1.9.7

Ref: https://github.com/Shopify/liquid/wiki/Liquid-for-Designers#allowed-collection-types

.eslintrc.json

@@ -0,0 +1,11 @@
+{
+  "extends": "standard",
+  "env": {
+    "browser": true,
+    "node": true
+  },
+  "plugins": [
+    "standard",
+    "promise"
+  ]
+}

.travis.yml

@@ -1,7 +1,9 @@
 language: node_js
 node_js:
+  - "node"
+  - "lts/*"
   - "4"
 before_script:
   - npm install -g mocha
 after_script: 
-  - NODE_ENV=test ./node_modules/.bin/istanbul cover --report lcovonly ./node_modules/mocha/bin/_mocha -- -R spec --recursive && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js && rm -rf ./coverage
+  - npm run lcov && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js && rm -rf ./coverage

README.md

@@ -1,27 +1,35 @@
-# shopify-liquid
+# liquidjs
 
-[![NPM version](https://img.shields.io/npm/v/shopify-liquid.svg?style=flat)](https://www.npmjs.org/package/shopify-liquid)
-[![Build Status](https://travis-ci.org/harttle/shopify-liquid.svg?branch=master)](https://travis-ci.org/harttle/shopify-liquid)
-[![Coverage Status](https://img.shields.io/coveralls/harttle/shopify-liquid/master.svg)](https://coveralls.io/github/harttle/shopify-liquid?branch=master)
-[![Dependency manager](https://img.shields.io/david/harttle/shopify-liquid.svg?style=flat)](https://david-dm.org/harttle/shopify-liquid)
+[![npm](https://img.shields.io/npm/v/liquidjs.svg)](https://www.npmjs.org/package/liquidjs)
+[![Build Status](https://travis-ci.org/harttle/liquidjs.svg?branch=master)](https://travis-ci.org/harttle/liquidjs)
+[![Coveralls](https://img.shields.io/coveralls/harttle/liquidjs.svg)](https://coveralls.io/github/harttle/liquidjs?branch=master)
+[![GitHub issues](https://img.shields.io/github/issues-closed/harttle/liquidjs.svg)](https://github.com/harttle/liquidjs/issues)
 
-A feature-rich Liquid template engine for Node.js and browsers,
-with compliance with [the Ruby version][shopify-liquid].
-New to Liquid? Here's a live demo: <http://harttle.com/shopify-liquid/>
+A Liquid engine implementation for both Node.js and browsers, with all [shopify/liquid][shopify/liquid] features.
+Formerly known as shopify-liquid. 
+
+Live Demo: <http://harttle.com/liquidjs/>
 
 > The Liquid template engine is implemented in Ruby originally, 
 > which is used by [Jekyll][jekyll] and [Github Pages][gh].
 
 Features:
 
-* Pretty much [builtin filters](https://github.com/harttle/shopify-liquid/wiki/Builtin-Filters) and [builtin tags](https://github.com/harttle/shopify-liquid/wiki/Builtin-Tags)
-* Async rendering, especially for tags
+* A wide range of [filters](https://github.com/harttle/liquidjs/wiki/Builtin-Filters) and [tags](https://github.com/harttle/liquidjs/wiki/Builtin-Tags)
+* Easy tag/filter registration, allows async tags
 * [any-promise][any-promise]
 
+API Reference:
+
+* Builtin Tags: <https://github.com/harttle/liquidjs/wiki/Builtin-Tags>
+* Builtin Filters: <https://github.com/harttle/liquidjs/wiki/Builtin-Filters>
+* Operators: <https://github.com/harttle/liquidjs/wiki/Operators>
+* Whitespace Control: <https://github.com/harttle/liquidjs/wiki/Whitespace-Control>
+
 Installation:
 
 ```bash
-npm install --save shopify-liquid
+npm install --save liquidjs
 ```
 
 ## Render from String
@@ -29,7 +37,7 @@ npm install --save shopify-liquid
 Parse and Render:
 
 ```javascript
-var Liquid = require('shopify-liquid');
+var Liquid = require('liquidjs');
 var engine = Liquid();
 
 engine.parseAndRender('{{name | capitalize}}', {name: 'alice'})
@@ -52,11 +60,8 @@ engine.render(tpl, {name: 'alice'})
 
 ```javascript
 var engine = Liquid({
-    root: path.resolve(__dirname, 'views/'),  // for layouts and includes
-    extname: '.liquid',
-    cache: false,
-    strict_filters: false,       // default: false
-    strict_variables: false      // default: false
+    root: path.resolve(__dirname, 'views/'),  // dirs to lookup layouts/includes
+    extname: '.liquid'          // the default extname used for layouts/includes
 });
 engine.renderFile("hello.liquid", {name: 'alice'})
     .then(function(html){
@@ -69,11 +74,15 @@ engine.renderFile("hello", {name: 'alice'})
     });
 ```
 
+## Options
+
+The full list of options for `Liquid()` is listed as following:
+
 * `root` is a directory or an array of directories to resolve layouts and includes, as well as the filename passed in when calling `.renderFile()`.
 If an array, the files are looked up in the order they occur in the array.
-Defaults to `process.cwd()`
+Defaults to `["."]`
 
-* `extname` is used to lookup the template file when filepath doesn't include an extension name. Defaults to `.liquid`
+* `extname` is used to lookup the template file when filepath doesn't include an extension name. Defaults to `".liquid"`
 
 * `cache` indicates whether or not to cache resolved templates. Defaults to `false`.
 
@@ -83,14 +92,17 @@ Defaults to `process.cwd()`
 If set to `false`, undefined variables will be rendered as empty string.
 Otherwise, undefined variables will cause an exception. Defaults to `false`.
 
+* `trim_right` is used to strip blank characters (including ` `, `\t`, and `\r`) from the right of tags (`{% %}`) until `\n` (inclusive). Defaults to `false`.
+
+* `trim_left` is similiar to `trim_right`, whereas the `\n` is exclusive. Defaults to `false`. See [Whitespace Control][whitespace control] for details.
+
+* `greedy` is used to specify whether `trim_left`/`trim_right` is greedy. When set to `true`, all successive blank characters including `\n` will be trimed regardless of line breaks. Defaults to `false`.
+
 ## Use with Express.js
 
 ```javascript
 // register liquid engine
-app.engine('liquid', engine.express({
-    strict_variables: true,         // Default: fasle
-    strict_filters: true            // Default: false
-})); 
+app.engine('liquid', engine.express()); 
 app.set('views', './views');            // specify the views directory
 app.set('view engine', 'liquid');       // set to default
 ```
@@ -115,11 +127,11 @@ And `window.Liquid` is what you want. There's also a [demo](demo/browser/).
     var engine = window.Liquid();
     var src = '{{ name | capitalize}}';
     var ctx = {
-      name: 'welcome to Shopify Liquid'
+      name: 'welcome to liquidjs'
     };
     engine.parseAndRender(src, ctx)
       .then(function(html) {
-        // html === Welcome to Shopify Liquid 
+        // html === Welcome to liquidjs
       });
   </script>
 </body>
@@ -183,7 +195,7 @@ engine.registerFilter('upper', function(v){
 });
 ```
 
-> See existing filter implementations: <https://github.com/harttle/shopify-liquid/blob/master/filters.js>
+> See existing filter implementations: <https://github.com/harttle/liquidjs/blob/master/filters.js>
 
 ## Register Tags
 
@@ -200,20 +212,21 @@ engine.registerTag('upper', {
 });
 ```
 
-> See existing tag implementations: <https://github.com/harttle/shopify-liquid/blob/master/tags/>
+> See existing tag implementations: <https://github.com/harttle/liquidjs/blob/master/tags/>
 
 ## Contribution Guide
 
 1. Write a [test][test] to define the feature you want.
-2. Just initiate an issue, or optionally:
+2. File an issue, or optionally:
 3. Get your test pass and make a pull request.
 
 [nunjucks]: http://mozilla.github.io/nunjucks/
 [liquid-node]: https://github.com/sirlantis/liquid-node
-[shopify-liquid]: https://shopify.github.io/liquid/
+[shopify/liquid]: https://shopify.github.io/liquid/
 [jekyll]: http://jekyllrb.com/
 [gh]: https://pages.github.com/
-[releases]: https://github.com/harttle/shopify-liquid/releases
+[releases]: https://github.com/harttle/liquidjs/releases
 [any-promise]: https://github.com/kevinbeaty/any-promise
-[test]: https://github.com/harttle/shopify-liquid/tree/master/test
+[test]: https://github.com/harttle/liquidjs/tree/master/test
 [caniuse-promises]: http://caniuse.com/#feat=promises
+[whitespace control]: https://github.com/harttle/liquidjs/wiki/Whitespace-Control

demo/express/app.js

@@ -1,22 +1,22 @@
-var express = require('express');
-var app = express();
-var Liquid = require('../..');
+var express = require('express')
+var app = express()
+var Liquid = require('../..')
 
 var engine = Liquid({
-    root: __dirname,  // for layouts and partials
-    extname: '.liquid'
-});
+  root: __dirname,  // for layouts and partials
+  extname: '.liquid'
+})
 
-app.engine('liquid', engine.express()); // register liquid engine
-app.set('views', ['./partials', './views']);            // specify the views directory
-app.set('view engine', 'liquid');       // set to default
+app.engine('liquid', engine.express()) // register liquid engine
+app.set('views', ['./partials', './views'])            // specify the views directory
+app.set('view engine', 'liquid')       // set to default
 
 app.get('/', function (req, res) {
-    var todos = ['fork and clone', 'make it better', 'make a pull request'];
-    res.render('todolist', {
-        todos: todos,
-        title: 'Welcome to shopify-liquid!'
-    });
-});
+  var todos = ['fork and clone', 'make it better', 'make a pull request']
+  res.render('todolist', {
+    todos: todos,
+    title: 'Welcome to liquidjs!'
+  })
+})
 
-module.exports = app;
+module.exports = app

demo/express/package.json

@@ -1,14 +1,14 @@
 {
   "name": "express-demo",
   "version": "1.0.0",
-  "description": "Express Demo Using Shopify-Liquid",
+  "description": "Express Demo Using liquidjs",
   "main": "index.js",
   "scripts": {
     "start": "node index.js",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "author": "harttle",
-  "license": "ISC",
+  "license": "MIT",
   "dependencies": {
     "express": "^4.14.0"
   }

filters.js

@@ -1,127 +1,127 @@
-const strftime = require('./src/util/strftime.js');
-const _ = require('./src/util/underscore.js');
+const strftime = require('./src/util/strftime.js')
+const _ = require('./src/util/underscore.js')
+const isTruthy = require('./src/syntax.js').isTruthy
 
 var escapeMap = {
-    '&': '&',
-    '<': '&lt;',
-    '>': '&gt;',
-    '"': '&#34;',
-    "'": '&#39;',
-};
+  '&': '&amp;',
+  '<': '&lt;',
+  '>': '&gt;',
+  '"': '&#34;',
+  "'": '&#39;'
+}
 var unescapeMap = {
-    '&amp;': '&',
-    '&lt;': '<',
-    '&gt;': '>',
-    '&#34;': '"',
-    '&#39;': "'",
-};
+  '&amp;': '&',
+  '&lt;': '<',
+  '&gt;': '>',
+  '&#34;': '"',
+  '&#39;': "'"
+}
 
 var filters = {
-    'abs': v => Math.abs(v),
-    'append': (v, arg) => v + arg,
-    'capitalize': str => stringify(str).charAt(0).toUpperCase() + str.slice(1),
-    'ceil': v => Math.ceil(v),
-    'date': (v, arg) => {
-        if (v === 'now') v = new Date();
-        return strftime(v, arg);
-    },
-    'default': (v, arg) => v || arg,
-    'divided_by': (v, arg) => Math.floor(v / arg),
-    'downcase': v => v.toLowerCase(),
-    'escape': escape,
+  'abs': v => Math.abs(v),
+  'append': (v, arg) => v + arg,
+  'capitalize': str => stringify(str).charAt(0).toUpperCase() + str.slice(1),
+  'ceil': v => Math.ceil(v),
+  'date': (v, arg) => {
+    if (v === 'now') v = new Date()
+    return v instanceof Date ? strftime(v, arg) : ''
+  },
+  'default': (v, arg) => isTruthy(v) ? v : arg,
+  'divided_by': (v, arg) => Math.floor(v / arg),
+  'downcase': v => v.toLowerCase(),
+  'escape': escape,
 
-    'escape_once': str => escape(unescape(str)),
-    'first': v => v[0],
-    'floor': v => Math.floor(v),
-    'join': (v, arg) => v.join(arg),
-    'last': v => v[v.length - 1],
-    'lstrip': v => stringify(v).replace(/^\s+/, ''),
-    'map': (arr, arg) => arr.map(v => v[arg]),
-    'minus': bindFixed((v, arg) => v - arg),
-    'modulo': bindFixed((v, arg) => v % arg),
-    'newline_to_br': v => v.replace(/\n/g, '<br />'),
-    'plus': bindFixed((v, arg) => v + arg),
-    'prepend': (v, arg) => arg + v,
-    'remove': (v, arg) => v.split(arg).join(''),
-    'remove_first': (v, l) => v.replace(l, ''),
-    'replace': (v, pattern, replacement) =>
-        stringify(v).split(pattern).join(replacement),
-    'replace_first': (v, arg1, arg2) => stringify(v).replace(arg1, arg2),
-    'reverse': v => v.reverse(),
-    'round': (v, arg) => {
-        var amp = Math.pow(10, arg || 0);
-        return Math.round(v * amp, arg) / amp;
-    },
-    'rstrip': str => stringify(str).replace(/\s+$/, ''),
-    'size': v => v.length,
-    'slice': (v, begin, length) =>
-        v.substr(begin, length === undefined ? 1 : length),
-    'sort': (v, arg) => v.sort(arg),
-    'split': (v, arg) => stringify(v).split(arg),
-    'strip': (v) => stringify(v).trim(),
-    'strip_html': v => stringify(v).replace(/<\/?\s*\w+\s*\/?>/g, ''),
-    'strip_newlines': v => stringify(v).replace(/\n/g, ''),
-    'times': (v, arg) => v * arg,
-    'truncate': (v, l, o) => {
-        v = stringify(v);
-        o = (o === undefined) ? '...' : o;
-        l = l || 16;
-        if (v.length <= l) return v;
-        return v.substr(0, l - o.length) + o;
-    },
-    'truncatewords': (v, l, o) => {
-        if (o === undefined) o = '...';
-        var arr = v.split(' ');
-        var ret = arr.slice(0, l).join(' ');
-        if (arr.length > l) ret += o;
-        return ret;
-    },
-    'uniq': function(arr) {
-        var u = {};
-        return (arr || []).filter(val => {
-            if (u.hasOwnProperty(val)) {
-                return false;
-            }
-            u[val] = true;
-            return true;
-        });
-    },
-    'upcase': str => stringify(str).toUpperCase(),
-    'url_encode': encodeURIComponent
-};
-
-function escape(str) {
-    return stringify(str).replace(/&|<|>|"|'/g, m => escapeMap[m]);
+  'escape_once': str => escape(unescape(str)),
+  'first': v => v[0],
+  'floor': v => Math.floor(v),
+  'join': (v, arg) => v.join(arg),
+  'last': v => v[v.length - 1],
+  'lstrip': v => stringify(v).replace(/^\s+/, ''),
+  'map': (arr, arg) => arr.map(v => v[arg]),
+  'minus': bindFixed((v, arg) => v - arg),
+  'modulo': bindFixed((v, arg) => v % arg),
+  'newline_to_br': v => v.replace(/\n/g, '<br />'),
+  'plus': bindFixed((v, arg) => Number(v) + Number(arg)),
+  'prepend': (v, arg) => arg + v,
+  'remove': (v, arg) => v.split(arg).join(''),
+  'remove_first': (v, l) => v.replace(l, ''),
+  'replace': (v, pattern, replacement) =>
+    stringify(v).split(pattern).join(replacement),
+  'replace_first': (v, arg1, arg2) => stringify(v).replace(arg1, arg2),
+  'reverse': v => v.reverse(),
+  'round': (v, arg) => {
+    var amp = Math.pow(10, arg || 0)
+    return Math.round(v * amp, arg) / amp
+  },
+  'rstrip': str => stringify(str).replace(/\s+$/, ''),
+  'size': v => v.length,
+  'slice': (v, begin, length) =>
+    v.substr(begin, length === undefined ? 1 : length),
+  'sort': (v, arg) => v.sort(arg),
+  'split': (v, arg) => stringify(v).split(arg),
+  'strip': (v) => stringify(v).trim(),
+  'strip_html': v => stringify(v).replace(/<\/?\s*\w+\s*\/?>/g, ''),
+  'strip_newlines': v => stringify(v).replace(/\n/g, ''),
+  'times': (v, arg) => v * arg,
+  'truncate': (v, l, o) => {
+    v = stringify(v)
+    o = (o === undefined) ? '...' : o
+    l = l || 16
+    if (v.length <= l) return v
+    return v.substr(0, l - o.length) + o
+  },
+  'truncatewords': (v, l, o) => {
+    if (o === undefined) o = '...'
+    var arr = v.split(' ')
+    var ret = arr.slice(0, l).join(' ')
+    if (arr.length > l) ret += o
+    return ret
+  },
+  'uniq': function (arr) {
+    var u = {}
+    return (arr || []).filter(val => {
+      if (u.hasOwnProperty(val)) {
+        return false
+      }
+      u[val] = true
+      return true
+    })
+  },
+  'upcase': str => stringify(str).toUpperCase(),
+  'url_encode': encodeURIComponent
 }
 
-function unescape(str) {
-    return stringify(str).replace(/&(amp|lt|gt|#34|#39);/g, m => unescapeMap[m]);
+function escape (str) {
+  return stringify(str).replace(/&|<|>|"|'/g, m => escapeMap[m])
 }
 
-function getFixed(v) {
-    var p = (v + "").split(".");
-    return (p.length > 1) ? p[1].length : 0;
+function unescape (str) {
+  return stringify(str).replace(/&(amp|lt|gt|#34|#39);/g, m => unescapeMap[m])
 }
 
-function getMaxFixed(l, r) {
-    return Math.max(getFixed(l), getFixed(r));
+function getFixed (v) {
+  var p = (v + '').split('.')
+  return (p.length > 1) ? p[1].length : 0
 }
 
-function stringify(obj) {
-    obj = obj || "";
-    return obj + '';
+function getMaxFixed (l, r) {
+  return Math.max(getFixed(l), getFixed(r))
 }
 
-function bindFixed(cb) {
-    return (l, r) => {
-        var f = getMaxFixed(l, r);
-        return cb(l, r).toFixed(f);
-    };
+function stringify (obj) {
+  return obj + ''
 }
 
-function registerAll(liquid) {
-    return _.forOwn(filters, (func, name) => liquid.registerFilter(name, func));
+function bindFixed (cb) {
+  return (l, r) => {
+    var f = getMaxFixed(l, r)
+    return cb(l, r).toFixed(f)
+  }
 }
 
-registerAll.filters = filters;
-module.exports = registerAll;
+function registerAll (liquid) {
+  return _.forOwn(filters, (func, name) => liquid.registerFilter(name, func))
+}
+
+registerAll.filters = filters
+module.exports = registerAll

index.js

@@ -1,152 +1,144 @@
-const Scope = require('./src/scope');
-const _ = require('./src/util/underscore.js');
-const assert = require('./src/util/assert.js');
-const tokenizer = require('./src/tokenizer.js');
-const statFileAsync = require('./src/util/fs.js').statFileAsync;
-const readFileAsync = require('./src/util/fs.js').readFileAsync;
-const path = require('path');
-const Render = require('./src/render.js');
-const lexical = require('./src/lexical.js');
-const Tag = require('./src/tag.js');
-const Filter = require('./src/filter.js');
-const Parser = require('./src/parser');
-const Syntax = require('./src/syntax.js');
-const tags = require('./tags');
-const filters = require('./filters');
-const Promise = require('any-promise');
-const anySeries = require('./src/util/promise.js').anySeries;
-const Errors = require('./src/util/error.js');
+const Scope = require('./src/scope')
+const _ = require('./src/util/underscore.js')
+const assert = require('./src/util/assert.js')
+const tokenizer = require('./src/tokenizer.js')
+const statFileAsync = require('./src/util/fs.js').statFileAsync
+const readFileAsync = require('./src/util/fs.js').readFileAsync
+const path = require('path')
+const Render = require('./src/render.js')
+const lexical = require('./src/lexical.js')
+const Tag = require('./src/tag.js')
+const Filter = require('./src/filter.js')
+const Parser = require('./src/parser')
+const Syntax = require('./src/syntax.js')
+const tags = require('./tags')
+const filters = require('./filters')
+const Promise = require('any-promise')
+const anySeries = require('./src/util/promise.js').anySeries
+const Errors = require('./src/util/error.js')
 
 var _engine = {
-    init: function(tag, filter, options) {
-        if (options.cache) {
-            this.cache = {};
-        }
-        this.options = options;
-        this.tag = tag;
-        this.filter = filter;
-        this.parser = Parser(tag, filter);
-        this.renderer = Render();
-
-        tags(this);
-        filters(this);
-
-        return this;
-    },
-    parse: function(html) {
-        var tokens = tokenizer.parse(html);
-        return this.parser.parse(tokens);
-    },
-    render: function(tpl, ctx, opts) {
-        opts = _.assign({}, this.options, opts);
-        var scope = Scope.factory(ctx, opts);
-        return this.renderer.renderTemplates(tpl, scope);
-    },
-    parseAndRender: function(html, ctx, opts) {
-        return Promise.resolve()
-            .then(() => this.parse(html))
-            .then(tpl => this.render(tpl, ctx, opts))
-            .catch(e => {
-                if (e instanceof Errors.RenderBreakError) {
-                    return e.html;
-                }
-                throw e;
-            });
-    },
-    renderFile: function(filepath, ctx, opts) {
-        opts = _.assign({}, opts);
-        return this.getTemplate(filepath, opts.root)
-            .then(templates => this.render(templates, ctx, opts))
-            .catch(e => {
-                e.file = filepath;
-                throw e;
-            });
-    },
-    evalOutput: function(str, scope) {
-        var tpl = this.parser.parseOutput(str.trim());
-        return this.renderer.evalOutput(tpl, scope);
-    },
-    registerFilter: function(name, filter) {
-        return this.filter.register(name, filter);
-    },
-    registerTag: function(name, tag) {
-        return this.tag.register(name, tag);
-    },
-    lookup: function(filepath, root) {
-        root = this.options.root.concat(root || []);
-        root = _.uniq(root);
-        var paths = root.map(root => path.resolve(root, filepath));
-        return anySeries(paths, path => statFileAsync(path).then(() => path))
-            .catch((e) => {
-                if (e.code === 'ENOENT') {
-                    e.message = `Failed to lookup ${filepath} in: ${root}`;
-                }
-                throw e;
-            });
-    },
-    getTemplate: function(filepath, root) {
-        if(!path.extname(filepath)){
-            filepath += this.options.extname;
-        }
-        return this
-            .lookup(filepath, root)
-            .then(filepath => {
-                if (this.options.cache) {
-                    var tpl = this.cache[filepath];
-                    if (tpl) {
-                        return Promise.resolve(tpl);
-                    }
-                    return readFileAsync(filepath)
-                        .then(str => this.parse(str))
-                        .then(tpl => this.cache[filepath] = tpl);
-                } else {
-                    return readFileAsync(filepath).then(str => this.parse(str));
-                }
-            });
-    },
-    express: function(opts) {
-        opts = opts || {};
-        var self = this;
-        return function(filePath, ctx, callback) {
-            assert(_.isArray(this.root) || _.isString(this.root), 
-                   'illegal views root, are you using express.js?');
-            opts.root = this.root;
-            self.renderFile(filePath, ctx, opts)
-                .then(html => callback(null, html))
-                .catch(e => callback(e));
-        };
+  init: function (tag, filter, options) {
+    if (options.cache) {
+      this.cache = {}
     }
-};
+    this.options = options
+    this.tag = tag
+    this.filter = filter
+    this.parser = Parser(tag, filter)
+    this.renderer = Render()
 
-function factory(options) {
-    options = _.assign({}, options);
-    options.root = normalizeStringArray(options.root);
-    if (!options.root.length) options.root = ['.'];
+    tags(this)
+    filters(this)
 
-    options.extname = options.extname || '.liquid';
-
-    var engine = Object.create(_engine);
-
-    engine.init(Tag(), Filter(options), options);
-    return engine;
+    return this
+  },
+  parse: function (html, filepath) {
+    var tokens = tokenizer.parse(html, filepath, this.options)
+    return this.parser.parse(tokens)
+  },
+  render: function (tpl, ctx, opts) {
+    opts = _.assign({}, this.options, opts)
+    var scope = Scope.factory(ctx, opts)
+    return this.renderer.renderTemplates(tpl, scope)
+  },
+  parseAndRender: function (html, ctx, opts) {
+    return Promise.resolve()
+      .then(() => this.parse(html))
+      .then(tpl => this.render(tpl, ctx, opts))
+  },
+  renderFile: function (filepath, ctx, opts) {
+    opts = _.assign({}, opts)
+    return this.getTemplate(filepath, opts.root)
+      .then(templates => this.render(templates, ctx, opts))
+  },
+  evalOutput: function (str, scope) {
+    var tpl = this.parser.parseOutput(str.trim())
+    return this.renderer.evalOutput(tpl, scope)
+  },
+  registerFilter: function (name, filter) {
+    return this.filter.register(name, filter)
+  },
+  registerTag: function (name, tag) {
+    return this.tag.register(name, tag)
+  },
+  lookup: function (filepath, root) {
+    root = this.options.root.concat(root || [])
+    root = _.uniq(root)
+    var paths = root.map(root => path.resolve(root, filepath))
+    return anySeries(paths, path => statFileAsync(path).then(() => path))
+      .catch((e) => {
+        e.message = `${e.code}: Failed to lookup ${filepath} in: ${root}`
+        throw e
+      })
+  },
+  getTemplate: function (filepath, root) {
+    if (!path.extname(filepath)) {
+      filepath += this.options.extname
+    }
+    return this
+      .lookup(filepath, root)
+      .then(filepath => {
+        if (this.options.cache) {
+          var tpl = this.cache[filepath]
+          if (tpl) {
+            return Promise.resolve(tpl)
+          }
+          return readFileAsync(filepath)
+            .then(str => this.parse(str))
+            .then(tpl => (this.cache[filepath] = tpl))
+        } else {
+          return readFileAsync(filepath).then(str => this.parse(str, filepath))
+        }
+      })
+  },
+  express: function (opts) {
+    opts = opts || {}
+    var self = this
+    return function (filePath, ctx, callback) {
+      assert(Array.isArray(this.root) || _.isString(this.root),
+        'illegal views root, are you using express.js?')
+      opts.root = this.root
+      self.renderFile(filePath, ctx, opts)
+        .then(html => callback(null, html))
+        .catch(e => callback(e))
+    }
+  }
 }
 
-function normalizeStringArray(value) {
-    if (_.isArray(value)) return value;
-    if (_.isString(value)) return [value];
-    return [];
+function factory (options) {
+  options = _.assign({
+    root: ['.'],
+    cache: false,
+    extname: '.liquid',
+    trim_right: false,
+    trim_left: false,
+    strict_filters: false,
+    strict_variables: false
+  }, options)
+  options.root = normalizeStringArray(options.root)
+
+  var engine = Object.create(_engine)
+  engine.init(Tag(), Filter(options), options)
+  return engine
 }
 
-factory.lexical = lexical;
-factory.isTruthy = Syntax.isTruthy;
-factory.isFalsy = Syntax.isFalsy;
-factory.evalExp = Syntax.evalExp;
-factory.evalValue = Syntax.evalValue;
+function normalizeStringArray (value) {
+  if (Array.isArray(value)) return value
+  if (_.isString(value)) return [value]
+  return []
+}
+
+factory.lexical = lexical
+factory.isTruthy = Syntax.isTruthy
+factory.isFalsy = Syntax.isFalsy
+factory.evalExp = Syntax.evalExp
+factory.evalValue = Syntax.evalValue
 factory.Types = {
-    ParseError: Errors.ParseError,
-    TokenizationEroor: Errors.TokenizationError,
-    RenderBreakError: Errors.RenderBreakError,
-    AssertionError: Errors.AssertionError
-};
+  ParseError: Errors.ParseError,
+  TokenizationEroor: Errors.TokenizationError,
+  RenderBreakError: Errors.RenderBreakError,
+  AssertionError: Errors.AssertionError
+}
 
-module.exports = factory;
+module.exports = factory

package.json

@@ -1,18 +1,21 @@
 {
-  "name": "shopify-liquid",
-  "version": "1.5.0",
-  "description": "A feature-rich Liquid template engine for Node.js and browsers, with compliance with the Ruby version.",
+  "name": "liquidjs",
+  "version": "1.9.7",
+  "description": "A Liquid template engine for Node.js and browsers, with all shopify/liquid features.",
   "main": "index.js",
   "scripts": {
-    "test": "mocha --recursive",
+    "lint": "eslint src/ test/",
+    "test": "npm run lint && mocha --recursive",
+    "coverage": "NODE_ENV=test istanbul cover --report html ./node_modules/mocha/bin/_mocha -- -R spec --recursive",
+    "lcov": "NODE_ENV=test istanbul cover --report lcovonly ./node_modules/mocha/bin/_mocha -- -R spec --recursive",
     "dist": "make dist",
     "preversion": "npm test",
     "version": "npm run dist && git add -A dist",
-    "postversion": "git push && git push --tags"
+    "postversion": "git push && git push --tags && npm publish"
   },
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/harttle/shopify-liquid.git"
+    "url": "git+https://github.com/harttle/liquidjs.git"
   },
   "keywords": [
     "liquid",
@@ -24,26 +27,33 @@
   "author": "Harttle",
   "license": "MIT",
   "bugs": {
-    "url": "https://github.com/harttle/shopify-liquid/issues"
+    "url": "https://github.com/harttle/liquidjs/issues"
   },
-  "homepage": "https://github.com/harttle/shopify-liquid#readme",
+  "homepage": "https://github.com/harttle/liquidjs#readme",
   "dependencies": {
     "any-promise": "^1.3.0"
   },
   "devDependencies": {
-    "babel-preset-es2015": "^6.14.0",
+    "babel-preset-es2015": "^6.24.1",
     "babelify": "^7.3.0",
-    "browserify": "^13.1.0",
-    "chai": "^3.5.0",
-    "chai-as-promised": "^5.3.0",
-    "coveralls": "^2.11.9",
-    "express": "^4.14.0",
-    "istanbul": "^0.4.3",
-    "mocha": "^3.0.2",
-    "mock-fs": "^3.9.0",
-    "sinon": "^1.17.4",
-    "sinon-chai": "^2.8.0",
-    "supertest": "^2.0.0",
-    "uglifyjs": "^2.4.10"
+    "browserify": "^14.4.0",
+    "chai": "^4.1.2",
+    "chai-as-promised": "^7.1.1",
+    "coveralls": "^3.0.0",
+    "eslint": "^4.8.0",
+    "eslint-config-standard": "^10.2.1",
+    "eslint-plugin-import": "^2.7.0",
+    "eslint-plugin-mocha": "^4.11.0",
+    "eslint-plugin-node": "^5.2.0",
+    "eslint-plugin-promise": "^3.5.0",
+    "eslint-plugin-standard": "^3.0.1",
+    "express": "^4.16.1",
+    "istanbul": "^0.4.5",
+    "mocha": "^4.0.0",
+    "mock-fs": "^4.4.1",
+    "sinon": "^4.0.1",
+    "sinon-chai": "^2.14.0",
+    "supertest": "^3.0.0",
+    "uglify-js": "^3.1.3"
   }
 }

src/filter.js

@@ -1,66 +1,66 @@
-const lexical = require('./lexical.js');
-const Syntax = require('./syntax.js');
-const assert = require('./util/assert.js');
-const _ = require('./util/underscore.js');
+const lexical = require('./lexical.js')
+const Syntax = require('./syntax.js')
+const assert = require('./util/assert.js')
+const _ = require('./util/underscore.js')
 
-var valueRE = new RegExp(`${lexical.value.source}`, 'g');
+var valueRE = new RegExp(`${lexical.value.source}`, 'g')
 
-module.exports = function(options) {
-    options = _.assign({}, options);
-    var filters = {};
+module.exports = function (options) {
+  options = _.assign({}, options)
+  var filters = {}
 
-    var _filterInstance = {
-        render: function(output, scope) {
-            var args = this.args.map(arg => Syntax.evalValue(arg, scope));
-            args.unshift(output);
-            return this.filter.apply(null, args);
-        },
-        parse: function(str) {
-            var match = lexical.filterLine.exec(str);
-            assert(match, 'illegal filter: ' + str);
+  var _filterInstance = {
+    render: function (output, scope) {
+      var args = this.args.map(arg => Syntax.evalValue(arg, scope))
+      args.unshift(output)
+      return this.filter.apply(null, args)
+    },
+    parse: function (str) {
+      var match = lexical.filterLine.exec(str)
+      assert(match, 'illegal filter: ' + str)
 
-            var name = match[1], argList = match[2] || '', filter = filters[name];
-            if (typeof filter !== 'function'){
-                if(options.strict_filters){
-                    throw new TypeError(`undefined filter: ${name}`);
-                }
-                this.name= name;
-                this.filter= x => x;
-                this.args= [];
-                return this;
-                //return {
-                    //name: name,
-                    //error: new TypeError(`undefined filter: ${name}`)
-                //};
-            }
-
-            var args = [];
-            while(match = valueRE.exec(argList.trim())){
-                args.push(match[0]);
-            }
-
-            this.name = name;
-            this.filter = filter;
-            this.args = args;
-
-            return this;
+      var name = match[1]
+      var argList = match[2] || ''
+      var filter = filters[name]
+      if (typeof filter !== 'function') {
+        if (options.strict_filters) {
+          throw new TypeError(`undefined filter: ${name}`)
         }
-    };
+        this.name = name
+        this.filter = x => x
+        this.args = []
+        return this
+      }
 
-    function construct(str) {
-        var instance = Object.create(_filterInstance);
-        return instance.parse(str);
+      var args = []
+      while ((match = valueRE.exec(argList.trim()))) {
+        var v = match[0]
+        var re = new RegExp(`${v}\\s*:`, 'g')
+        re.test(match.input) ? args.push(`'${v}'`) : args.push(v)
+      }
+
+      this.name = name
+      this.filter = filter
+      this.args = args
+
+      return this
     }
+  }
 
-    function register(name, filter) {
-        filters[name] = filter;
-    }
+  function construct (str) {
+    var instance = Object.create(_filterInstance)
+    return instance.parse(str)
+  }
 
-    function clear() {
-        filters = {};
-    }
+  function register (name, filter) {
+    filters[name] = filter
+  }
 
-    return {
-        construct, register, clear
-    };
-};
+  function clear () {
+    filters = {}
+  }
+
+  return {
+    construct, register, clear
+  }
+}

src/lexical.js

@@ -1,91 +1,116 @@
 // quote related
-var singleQuoted = /'[^']*'/;
-var doubleQuoted = /"[^"]*"/;
-var quoted = new RegExp(`${singleQuoted.source}|${doubleQuoted.source}`);
-var quoteBalanced = new RegExp(`(?:${quoted.source}|[^'"])*`);
+var singleQuoted = /'[^']*'/
+var doubleQuoted = /"[^"]*"/
+var quoted = new RegExp(`${singleQuoted.source}|${doubleQuoted.source}`)
+var quoteBalanced = new RegExp(`(?:${quoted.source}|[^'"])*`)
 
 // basic types
-var integer = /-?\d+/;
-var number = /-?\d+\.?\d*|\.?\d+/;
-var bool = /true|false/;
+var integer = /-?\d+/
+var number = /-?\d+\.?\d*|\.?\d+/
+var bool = /true|false/
 
 // peoperty access
-var identifier = /[\w-]+/;
-var subscript = new RegExp(`\\[(?:${quoted.source}|[\\w-\\.]+)\\]`);
-var literal = new RegExp(`(?:${quoted.source}|${bool.source}|${number.source})`);
-var variable = new RegExp(`${identifier.source}(?:\\.${identifier.source}|${subscript.source})*`);
+var identifier = /[\w-]+/
+var subscript = new RegExp(`\\[(?:${quoted.source}|[\\w-\\.]+)\\]`)
+var literal = new RegExp(`(?:${quoted.source}|${bool.source}|${number.source})`)
+var variable = new RegExp(`${identifier.source}(?:\\.${identifier.source}|${subscript.source})*`)
 
 // range related
-var rangeLimit = new RegExp(`(?:${variable.source}|${number.source})`);
-var range = new RegExp(`\\(${rangeLimit.source}\\.\\.${rangeLimit.source}\\)`);
-var rangeCapture = new RegExp(`\\((${rangeLimit.source})\\.\\.(${rangeLimit.source})\\)`);
+var rangeLimit = new RegExp(`(?:${variable.source}|${number.source})`)
+var range = new RegExp(`\\(${rangeLimit.source}\\.\\.${rangeLimit.source}\\)`)
+var rangeCapture = new RegExp(`\\((${rangeLimit.source})\\.\\.(${rangeLimit.source})\\)`)
 
-var value = new RegExp(`(?:${variable.source}|${literal.source}|${range.source})`);
+var value = new RegExp(`(?:${variable.source}|${literal.source}|${range.source})`)
 
 // hash related
-var hash = new RegExp(`(?:${identifier.source})\\s*:\\s*(?:${value.source})`);
-var hashCapture = new RegExp(`(${identifier.source})\\s*:\\s*(${value.source})`, 'g');
+var hash = new RegExp(`(?:${identifier.source})\\s*:\\s*(?:${value.source})`)
+var hashCapture = new RegExp(`(${identifier.source})\\s*:\\s*(${value.source})`, 'g')
 
 // full match
-var tagLine = new RegExp(`^\\s*(${identifier.source})\\s*(.*)\\s*$`);
-var literalLine = new RegExp(`^${literal.source}$`, 'i');
-var variableLine = new RegExp(`^${variable.source}$`);
-var numberLine = new RegExp(`^${number.source}$`);
-var boolLine = new RegExp(`^${bool.source}$`, 'i');
-var quotedLine = new RegExp(`^${quoted.source}$`);
-var rangeLine = new RegExp(`^${rangeCapture.source}$`);
-var integerLine = new RegExp(`^${integer.source}$`);
+var tagLine = new RegExp(`^\\s*(${identifier.source})\\s*([\\s\\S]*)\\s*$`)
+var literalLine = new RegExp(`^${literal.source}$`, 'i')
+var variableLine = new RegExp(`^${variable.source}$`)
+var numberLine = new RegExp(`^${number.source}$`)
+var boolLine = new RegExp(`^${bool.source}$`, 'i')
+var quotedLine = new RegExp(`^${quoted.source}$`)
+var rangeLine = new RegExp(`^${rangeCapture.source}$`)
+var integerLine = new RegExp(`^${integer.source}$`)
 
 // filter related
-var valueList = new RegExp(`${value.source}(\\s*,\\s*${value.source})*`);
-var filter = new RegExp(`${identifier.source}(?:\\s*:\\s*${valueList.source})?`, 'g');
-var filterCapture = new RegExp(`(${identifier.source})(?:\\s*:\\s*(${valueList.source}))?`);
-var filterLine = new RegExp(`^${filterCapture.source}$`);
+var valueDeclaration = new RegExp(`(?:${identifier.source}\\s*:\\s*)?${value.source}`)
+var valueList = new RegExp(`${valueDeclaration.source}(\\s*,\\s*${valueDeclaration.source})*`)
+var filter = new RegExp(`${identifier.source}(?:\\s*:\\s*${valueList.source})?`, 'g')
+var filterCapture = new RegExp(`(${identifier.source})(?:\\s*:\\s*(${valueList.source}))?`)
+var filterLine = new RegExp(`^${filterCapture.source}$`)
 
 var operators = [
-    /\s+or\s+/,
-    /\s+and\s+/,
-    /==|!=|<=|>=|<|>|\s+contains\s+/
-];
+  /\s+or\s+/,
+  /\s+and\s+/,
+  /==|!=|<=|>=|<|>|\s+contains\s+/
+]
 
-function isInteger(str){
-    return integerLine.test(str);
+function isInteger (str) {
+  return integerLine.test(str)
 }
 
-function isLiteral(str) {
-    return literalLine.test(str);
+function isLiteral (str) {
+  return literalLine.test(str)
 }
 
-function isRange(str) {
-    return rangeLine.test(str);
+function isRange (str) {
+  return rangeLine.test(str)
 }
 
-function isVariable(str) {
-    return variableLine.test(str);
+function isVariable (str) {
+  return variableLine.test(str)
 }
 
-function matchValue(str) {
-    return value.exec(str);
+function matchValue (str) {
+  return value.exec(str)
 }
 
-function parseLiteral(str) {
-    var res;
-    if (res = str.match(numberLine)) {
-        return Number(str);
-    }
-    if (res = str.match(boolLine)) {
-        return str.toLowerCase() === 'true';
-    }
-    if (res = str.match(quotedLine)) {
-        return str.slice(1, -1);
-    }
+function parseLiteral (str) {
+  var res = str.match(numberLine)
+  if (res) {
+    return Number(str)
+  }
+  res = str.match(boolLine)
+  if (res) {
+    return str.toLowerCase() === 'true'
+  }
+  res = str.match(quotedLine)
+  if (res) {
+    return str.slice(1, -1)
+  }
+  throw new TypeError(`cannot parse '${str}' as literal`)
 }
 
 module.exports = {
-    quoted, number, bool, literal, filter, integer,
-    hash, hashCapture,
-    range, rangeCapture, 
-    identifier, value, quoteBalanced, operators,
-    quotedLine, numberLine, boolLine, rangeLine, literalLine, filterLine, tagLine,
-    isLiteral, isVariable, parseLiteral, isRange, matchValue, isInteger
-};
+  quoted,
+  number,
+  bool,
+  literal,
+  filter,
+  integer,
+  hash,
+  hashCapture,
+  range,
+  rangeCapture,
+  identifier,
+  value,
+  quoteBalanced,
+  operators,
+  quotedLine,
+  numberLine,
+  boolLine,
+  rangeLine,
+  literalLine,
+  filterLine,
+  tagLine,
+  isLiteral,
+  isVariable,
+  parseLiteral,
+  isRange,
+  matchValue,
+  isInteger
+}

src/operators.js

@@ -1,13 +1,17 @@
 var operators = {
-    '==': (l, r) => l == r,
-    '!=': (l, r) => l != r,
-    '>': (l, r) => l > r,
-    '<': (l, r) => l < r,
-    '>=': (l, r) => l >= r,
-    '<=': (l, r) => l <= r,
-    'contains': (l, r) => l.indexOf(r) > -1,
-    'and': (l, r) => l && r,
-    'or': (l, r) => l || r
-};
+  '==': (l, r) => l === r,
+  '!=': (l, r) => l !== r,
+  '>': (l, r) => l !== null && r !== null && l > r,
+  '<': (l, r) => l !== null && r !== null && l < r,
+  '>=': (l, r) => l !== null && r !== null && l >= r,
+  '<=': (l, r) => l !== null && r !== null && l <= r,
+  'contains': (l, r) => {
+    if (!l) return false
+    if (typeof l.indexOf !== 'function') return false
+    return l.indexOf(r) > -1
+  },
+  'and': (l, r) => l && r,
+  'or': (l, r) => l || r
+}
 
-module.exports = operators;
+module.exports = operators

src/parser.js

@@ -1,105 +1,105 @@
-const lexical = require('./lexical.js');
-const ParseError = require('./util/error.js').ParseError;
-const assert = require('./util/assert.js');
+const lexical = require('./lexical.js')
+const ParseError = require('./util/error.js').ParseError
+const assert = require('./util/assert.js')
 
-module.exports = function(Tag, Filter) {
-
-    var stream = {
-        init: function(tokens) {
-            this.tokens = tokens;
-            this.handlers = {};
-            return this;
-        },
-        on: function(name, cb) {
-            this.handlers[name] = cb;
-            return this;
-        },
-        trigger: function(event, arg) {
-            var h = this.handlers[event];
-            if (typeof h === 'function') {
-                h(arg);
-                return true;
-            }
-        },
-        start: function() {
-            this.trigger('start');
-            var token;
-            while (!this.stopRequested && (token = this.tokens.shift())) {
-                if (this.trigger('token', token)) continue;
-                if (token.type == 'tag' &&
-                    this.trigger(`tag:${token.name}`, token)) {
-                    continue;
-                }
-                var template = parseToken(token, this.tokens);
-                this.trigger('template', template);
-            }
-            if (!this.stopRequested) this.trigger('end');
-            return this;
-        },
-        stop: function() {
-            this.stopRequested = true;
-            return this;
+module.exports = function (Tag, Filter) {
+  var stream = {
+    init: function (tokens) {
+      this.tokens = tokens
+      this.handlers = {}
+      return this
+    },
+    on: function (name, cb) {
+      this.handlers[name] = cb
+      return this
+    },
+    trigger: function (event, arg) {
+      var h = this.handlers[event]
+      if (typeof h === 'function') {
+        h(arg)
+        return true
+      }
+    },
+    start: function () {
+      this.trigger('start')
+      var token
+      while (!this.stopRequested && (token = this.tokens.shift())) {
+        if (this.trigger('token', token)) continue
+        if (token.type === 'tag' &&
+            this.trigger(`tag:${token.name}`, token)) {
+          continue
         }
-    };
-
-    function parse(tokens) {
-        var token, templates = [];
-        while (token = tokens.shift()) {
-            templates.push(parseToken(token, tokens));
-        }
-        return templates;
+        var template = parseToken(token, this.tokens)
+        this.trigger('template', template)
+      }
+      if (!this.stopRequested) this.trigger('end')
+      return this
+    },
+    stop: function () {
+      this.stopRequested = true
+      return this
     }
+  }
 
-    function parseToken(token, tokens) {
-        try {
-            var tpl = null;
-            if (token.type === 'tag') {
-                tpl = parseTag(token, tokens);
-            } else if (token.type === 'output') {
-                tpl = parseOutput(token.value);
-            } else { // token.type === 'html'
-                tpl = token;
-            }
-            tpl.token = token;
-            return tpl;
-        } catch (e) {
-            throw new ParseError(e, token);
-        }
+  function parse (tokens) {
+    var token
+    var templates = []
+    while ((token = tokens.shift())) {
+      templates.push(parseToken(token, tokens))
     }
+    return templates
+  }
 
-    function parseTag(token, tokens) {
-        if (token.name === 'continue' || token.name === 'break') return token;
-        return Tag.construct(token, tokens);
+  function parseToken (token, tokens) {
+    try {
+      var tpl = null
+      if (token.type === 'tag') {
+        tpl = parseTag(token, tokens)
+      } else if (token.type === 'output') {
+        tpl = parseOutput(token.value)
+      } else { // token.type === 'html'
+        tpl = token
+      }
+      tpl.token = token
+      return tpl
+    } catch (e) {
+      throw new ParseError(e, token)
     }
+  }
 
-    function parseOutput(str) {
-        var match = lexical.matchValue(str);
-        assert(match, `illegal output string: ${str}`);
+  function parseTag (token, tokens) {
+    if (token.name === 'continue' || token.name === 'break') return token
+    return Tag.construct(token, tokens)
+  }
 
-        var initial = match[0];
-        str = str.substr(match.index + match[0].length);
+  function parseOutput (str) {
+    var match = lexical.matchValue(str)
+    assert(match, `illegal output string: ${str}`)
 
-        var filters = [];
-        while (match = lexical.filter.exec(str)) {
-            filters.push([match[0].trim()]);
-        }
+    var initial = match[0]
+    str = str.substr(match.index + match[0].length)
 
-        return {
-            type: 'output',
-            initial: initial,
-            filters: filters.map(str => Filter.construct(str))
-        };
-    }
-
-    function parseStream(tokens) {
-        var s = Object.create(stream);
-        return s.init(tokens);
+    var filters = []
+    while ((match = lexical.filter.exec(str))) {
+      filters.push([match[0].trim()])
     }
 
     return {
-        parse,
-        parseTag,
-        parseStream,
-        parseOutput
-    };
-};
+      type: 'output',
+      initial: initial,
+      filters: filters.map(str => Filter.construct(str))
+    }
+  }
+
+  function parseStream (tokens) {
+    var s = Object.create(stream)
+    return s.init(tokens)
+  }
+
+  return {
+    parse,
+    parseTag,
+    parseStream,
+    parseOutput
+  }
+}

src/render.js

@@ -1,68 +1,68 @@
-const Syntax = require('./syntax.js');
-const Promise = require('any-promise');
-const mapSeries = require('./util/promise.js').mapSeries;
-const RenderBreakError = require('./util/error.js').RenderBreakError;
-const RenderError = require('./util/error.js').RenderError;
-const assert = require('./util/assert.js');
+const Syntax = require('./syntax.js')
+const Promise = require('any-promise')
+const mapSeries = require('./util/promise.js').mapSeries
+const RenderBreakError = require('./util/error.js').RenderBreakError
+const RenderError = require('./util/error.js').RenderError
+const assert = require('./util/assert.js')
 
 var render = {
 
-    renderTemplates: function(templates, scope) {
-        assert(scope, 'unable to evalTemplates: scope undefined');
+  renderTemplates: function (templates, scope) {
+    assert(scope, 'unable to evalTemplates: scope undefined')
 
-        var html = '';
-        return mapSeries(templates, (tpl) => {
-            return renderTemplate.call(this, tpl)
-                .then(partial => html += partial)
-                .catch(e => {
-                    if (e instanceof RenderBreakError) {
-                        e.resolvedHTML = html;
-                        throw e;
-                    }
-                    throw new RenderError(e, tpl);
-                });
-        }).then(() => html);
+    var html = ''
+    return mapSeries(templates, (tpl) => {
+      return renderTemplate.call(this, tpl)
+        .then(partial => (html += partial))
+        .catch(e => {
+          if (e instanceof RenderBreakError) {
+            e.resolvedHTML = html
+            throw e
+          }
+          throw new RenderError(e, tpl)
+        })
+    }).then(() => html)
 
-        function renderTemplate(template) {
-            if (template.type === 'tag') {
-                return this.renderTag(template, scope)
-                    .then(partial => partial === undefined ? '' : partial);
-            } else if (template.type === 'output') {
-                return Promise.resolve()
-                    .then(() => this.evalOutput(template, scope))
-                    .then(partial => partial === undefined ? '' : stringify(partial));
-            } else { // template.type === 'html'
-                return Promise.resolve(template.value);
-            }
-        }
-    },
-
-    renderTag: function(template, scope) {
-        if (template.name === 'continue') {
-            return Promise.reject(new RenderBreakError('continue'));
-        }
-        if (template.name === 'break') {
-            return Promise.reject(new RenderBreakError('break'));
-        }
-        return template.render(scope);
-    },
-
-    evalOutput: function(template, scope) {
-        assert(scope, 'unable to evalOutput: scope undefined');
-        return template.filters.reduce(
-            (prev, filter) => filter.render(prev, scope),
-            Syntax.evalExp(template.initial, scope));
+    function renderTemplate (template) {
+      if (template.type === 'tag') {
+        return this.renderTag(template, scope)
+          .then(partial => partial === undefined ? '' : partial)
+      } else if (template.type === 'output') {
+        return Promise.resolve()
+          .then(() => this.evalOutput(template, scope))
+          .then(partial => partial === undefined ? '' : stringify(partial))
+      } else { // template.type === 'html'
+        return Promise.resolve(template.value)
+      }
     }
-};
+  },
 
-function factory() {
-    var instance = Object.create(render);
-    return instance;
+  renderTag: function (template, scope) {
+    if (template.name === 'continue') {
+      return Promise.reject(new RenderBreakError('continue'))
+    }
+    if (template.name === 'break') {
+      return Promise.reject(new RenderBreakError('break'))
+    }
+    return template.render(scope)
+  },
+
+  evalOutput: function (template, scope) {
+    assert(scope, 'unable to evalOutput: scope undefined')
+    return template.filters.reduce(
+      (prev, filter) => filter.render(prev, scope),
+      Syntax.evalExp(template.initial, scope))
+  }
 }
 
-function stringify(val) {
-    if (typeof val === 'string') return val;
-    return JSON.stringify(val);
+function factory () {
+  var instance = Object.create(render)
+  return instance
 }
 
-module.exports = factory;
+function stringify (val) {
+  if (typeof val === 'string') return val
+  return JSON.stringify(val)
+}
+
+module.exports = factory

src/scope.js

@@ -1,172 +1,186 @@
-const _ = require('./util/underscore.js');
-const lexical = require('./lexical.js');
-const assert = require('./util/assert.js');
+const _ = require('./util/underscore.js')
+const lexical = require('./lexical.js')
+const assert = require('./util/assert.js')
 
 var Scope = {
-    getAll: function() {
-        var ctx = {};
-        for (var i = this.scopes.length - 1; i >= 0; i--) {
-            _.assign(ctx, this.scopes[i]);
-        }
-        return ctx;
-    },
-    get: function(str) {
-        for (var i = this.scopes.length - 1; i >= 0; i--) {
-            try {
-                return this.getPropertyByPath(this.scopes[i], str);
-            } catch (e) {
-                if (/undefined variable/.test(e.message)) {
-                    continue;
-                }
-                if (/Cannot read property/.test(e.message)) {
-                    if (this.opts.strict_variables) {
-                        e.message += ': ' + str;
-                        throw e;
-                    } else {
-                        continue;
-                    }
-                } else {
-                    e.message += ': ' + str;
-                    throw e;
-                }
-            }
-        }
-        if (this.opts.strict_variables) {
-            throw new TypeError('undefined variable: ' + str);
-        }
-    },
-    set: function(k, v) {
-        this.setPropertyByPath(this.scopes[this.scopes.length - 1], k, v);
-        return this;
-    },
-    push: function(ctx) {
-        assert(ctx, `trying to push ${ctx} into scopes`);
-        return this.scopes.push(ctx);
-    },
-    pop: function() {
-        return this.scopes.pop();
-    },
-    unshift: function(ctx) {
-        assert(ctx, `trying to push ${ctx} into scopes`);
-        return this.scopes.unshift(ctx);
-    },
-    shift: function() {
-        return this.scopes.shift();
-    },
-    setPropertyByPath: function(obj, path, val) {
-        if (_.isString(path)) {
-            var paths = path.replace(/\[/g, '.').replace(/\]/g, '').split('.');
-            for (var i = 0; i < paths.length; i++) {
-                var key = paths[i];
-                if (i === paths.length - 1) {
-                    return obj[key] = val;
-                }
-                if (undefined === obj[key]) obj[key] = {};
-                // case for readonly objects
-                obj = obj[key] || {};
-            }
-        }
-    },
-
-    getPropertyByPath: function(obj, path) {
-        var paths = this.propertyAccessSeq(path + '');
-        var varName = paths.shift();
-        if (!obj.hasOwnProperty(varName)) {
-            throw new TypeError('undefined variable');
-        }
-        var variable = obj[varName];
-        paths.forEach(p => variable = variable[p]);
-        return variable;
-    },
-
-    /*
-     * Parse property access sequence from access string
-     * @example
-     * accessSeq("foo.bar")            // ['foo', 'bar']
-     * accessSeq("foo['bar']")      // ['foo', 'bar']
-     * accessSeq("foo['b]r']")      // ['foo', 'b]r']
-     * accessSeq("foo[bar.coo]")    // ['foo', 'bar'], for bar.coo == 'bar'
-     */
-    propertyAccessSeq: function(str) {
-        var seq = [],
-            name = '';
-        for (var i = 0; i < str.length; i++) {
-            if (str[i] === '[') {
-                seq.push(name);
-                name = '';
-
-                var delemiter = str[i + 1];
-                // foo[bar.coo]
-                if (delemiter !== "'" && delemiter !== '"') {
-                    var j = matchRightBracket(str, i + 1);
-                    assert(j !== -1, `unbalanced []: ${str}`);
-                    name = str.slice(i + 1, j);
-                    // foo[1]
-                    if (lexical.isInteger(name)) {
-                        seq.push(name);
-                    }
-                    // foo["bar"]
-                    else {
-                        seq.push(this.get(name));
-                    }
-                    name = '';
-                    i = j;
-                }
-                // foo["bar"]
-                else {
-                    j = str.indexOf(delemiter, i + 2);
-                    assert(j !== -1, `unbalanced ${delemiter}: ${str}`);
-                    name = str.slice(i + 2, j);
-                    seq.push(name);
-                    name = '';
-                    i = j + 1;
-                }
-            }
-            // foo.bar
-            else if (str[i] === ".") {
-                seq.push(name);
-                name = '';
-            }
-            //foo.bar
-            else {
-                name += str[i];
-            }
-        }
-        if (name.length) seq.push(name);
-        return seq;
+  getAll: function () {
+    var ctx = {}
+    for (var i = this.scopes.length - 1; i >= 0; i--) {
+      _.assign(ctx, this.scopes[i])
     }
-};
-
-function matchRightBracket(str, begin) {
-    var stack = 1; // count of '[' - count of ']'
-    for (var i = begin; i < str.length; i++) {
-        if (str[i] === '[') {
-            stack++;
-        }
-        if (str[i] === ']') {
-            stack--;
-            if (stack === 0) {
-                return i;
-            }
-        }
+    return ctx
+  },
+  get: function (str) {
+    try {
+      return this.getPropertyByPath(this.scopes, str)
+    } catch (e) {
+      if (!/undefined variable/.test(e.message) || this.opts.strict_variables) {
+        throw e
+      }
     }
-    return -1;
+  },
+  set: function (k, v) {
+    var scope = this.findScopeFor(k)
+    setPropertyByPath(scope, k, v)
+    return this
+  },
+  push: function (ctx) {
+    assert(ctx, `trying to push ${ctx} into scopes`)
+    return this.scopes.push(ctx)
+  },
+  pop: function () {
+    return this.scopes.pop()
+  },
+  findScopeFor: function (key) {
+    var i = this.scopes.length - 1
+    while (i >= 0 && !(key in this.scopes[i])) {
+      i--
+    }
+    if (i < 0) {
+      i = this.scopes.length - 1
+    }
+    return this.scopes[i]
+  },
+  unshift: function (ctx) {
+    assert(ctx, `trying to push ${ctx} into scopes`)
+    return this.scopes.unshift(ctx)
+  },
+  shift: function () {
+    return this.scopes.shift()
+  },
+
+  getPropertyByPath: function (scopes, path) {
+    var paths = this.propertyAccessSeq(path + '')
+    if (!paths.length) {
+      throw new TypeError('undefined variable: ' + path)
+    }
+    var key = paths.shift()
+    var value = getValueFromScopes(key, scopes)
+    return paths.reduce(
+      (value, key) => {
+        if (_.isNil(value)) {
+          throw new TypeError('undefined variable: ' + key)
+        }
+        return getValueFromParent(key, value)
+      },
+      value
+    )
+  },
+
+  /*
+   * Parse property access sequence from access string
+   * @example
+   * accessSeq("foo.bar")            // ['foo', 'bar']
+   * accessSeq("foo['bar']")      // ['foo', 'bar']
+   * accessSeq("foo['b]r']")      // ['foo', 'b]r']
+   * accessSeq("foo[bar.coo]")    // ['foo', 'bar'], for bar.coo == 'bar'
+   */
+  propertyAccessSeq: function (str) {
+    var seq = []
+    var name = ''
+    var j
+    var i = 0
+    while (i < str.length) {
+      switch (str[i]) {
+        case '[':
+          push()
+
+          var delemiter = str[i + 1]
+          if (/['"]/.test(delemiter)) { // foo["bar"]
+            j = str.indexOf(delemiter, i + 2)
+            assert(j !== -1, `unbalanced ${delemiter}: ${str}`)
+            name = str.slice(i + 2, j)
+            push()
+            i = j + 2
+          } else { // foo[bar.coo]
+            j = matchRightBracket(str, i + 1)
+            assert(j !== -1, `unbalanced []: ${str}`)
+            name = str.slice(i + 1, j)
+            if (!lexical.isInteger(name)) { // foo[bar] vs. foo[1]
+              name = this.get(name)
+            }
+            push()
+            i = j + 1
+          }
+          break
+        case '.':// foo.bar, foo[0].bar
+          push()
+          i++
+          break
+        default:// foo.bar
+          name += str[i]
+          i++
+      }
+    }
+    push()
+    return seq
+
+    function push () {
+      if (name.length) seq.push(name)
+      name = ''
+    }
+  }
 }
 
-exports.factory = function(ctx, opts) {
-    opts = _.assign({
-        strict_variables: false,
-        strict_filters: false,
-        blocks: {},
-        root: []
-    }, opts);
+function setPropertyByPath (obj, path, val) {
+  var paths = (path + '').replace(/\[/g, '.').replace(/\]/g, '').split('.')
+  for (var i = 0; i < paths.length; i++) {
+    var key = paths[i]
+    if (i === paths.length - 1) {
+      return (obj[key] = val)
+    }
+    if (undefined === obj[key]) obj[key] = {}
+    // case for readonly objects
+    obj = obj[key] || {}
+  }
+}
 
-    ctx = _.assign(ctx, {
-        liquid: opts
-    });
+function getValueFromParent (key, value) {
+  return (key === 'size' && (_.isArray(value) || _.isString(value)))
+    ? value.length
+    : value[key]
+}
 
-    var scope = Object.create(Scope);
-    scope.opts = opts;
-    scope.scopes = [ctx];
-    return scope;
-};
+function getValueFromScopes (key, scopes) {
+  for (var i = scopes.length - 1; i > -1; i--) {
+    var scope = scopes[i]
+    if (scope.hasOwnProperty(key)) {
+      return scope[key]
+    }
+  }
+  throw new TypeError('undefined variable: ' + key)
+}
+
+function matchRightBracket (str, begin) {
+  var stack = 1 // count of '[' - count of ']'
+  for (var i = begin; i < str.length; i++) {
+    if (str[i] === '[') {
+      stack++
+    }
+    if (str[i] === ']') {
+      stack--
+      if (stack === 0) {
+        return i
+      }
+    }
+  }
+  return -1
+}
+
+exports.factory = function (ctx, opts) {
+  opts = _.assign({
+    strict_variables: false,
+    strict_filters: false,
+    blocks: {},
+    root: []
+  }, opts)
+
+  ctx = _.assign(ctx, {
+    liquid: opts
+  })
+
+  var scope = Object.create(Scope)
+  scope.opts = opts
+  scope.scopes = [ctx]
+  return scope
+}

src/syntax.js

@@ -1,56 +1,56 @@
-const operators = require('./operators.js');
-const lexical = require('./lexical.js');
-const assert = require('../src/util/assert.js');
+const operators = require('./operators.js')
+const lexical = require('./lexical.js')
+const assert = require('../src/util/assert.js')
 
-function evalExp(exp, scope) {
-    assert(scope, 'unable to evalExp: scope undefined');
-    var operatorREs = lexical.operators,
-        match;
-    for (var i = 0; i < operatorREs.length; i++) {
-        var operatorRE = operatorREs[i];
-        var expRE = new RegExp(`^(${lexical.quoteBalanced.source})(${operatorRE.source})(${lexical.quoteBalanced.source})$`);
-        if (match = exp.match(expRE)) {
-            var l = evalExp(match[1], scope);
-            var op = operators[match[2].trim()];
-            var r = evalExp(match[3], scope);
-            return op(l, r);
-        }
+function evalExp (exp, scope) {
+  assert(scope, 'unable to evalExp: scope undefined')
+  var operatorREs = lexical.operators
+  var match
+  for (var i = 0; i < operatorREs.length; i++) {
+    var operatorRE = operatorREs[i]
+    var expRE = new RegExp(`^(${lexical.quoteBalanced.source})(${operatorRE.source})(${lexical.quoteBalanced.source})$`)
+    if ((match = exp.match(expRE))) {
+      var l = evalExp(match[1], scope)
+      var op = operators[match[2].trim()]
+      var r = evalExp(match[3], scope)
+      return op(l, r)
     }
+  }
 
-    if (match = exp.match(lexical.rangeLine)) {
-        var low = evalValue(match[1], scope),
-            high = evalValue(match[2], scope);
-        var range = [];
-        for (var j = low; j <= high; j++) {
-            range.push(j);
-        }
-        return range;
+  if ((match = exp.match(lexical.rangeLine))) {
+    var low = evalValue(match[1], scope)
+    var high = evalValue(match[2], scope)
+    var range = []
+    for (var j = low; j <= high; j++) {
+      range.push(j)
     }
+    return range
+  }
 
-    return evalValue(exp, scope);
+  return evalValue(exp, scope)
 }
 
-function evalValue(str, scope) {
-    str = str && str.trim();
-    if (!str) return undefined;
+function evalValue (str, scope) {
+  str = str && str.trim()
+  if (!str) return undefined
 
-    if (lexical.isLiteral(str)) {
-        return lexical.parseLiteral(str);
-    }
-    if (lexical.isVariable(str)) {
-        return scope.get(str);
-    }
+  if (lexical.isLiteral(str)) {
+    return lexical.parseLiteral(str)
+  }
+  if (lexical.isVariable(str)) {
+    return scope.get(str)
+  }
+  throw new TypeError(`cannot eval '${str}' as value`)
 }
 
-function isTruthy(val) {
-    if (val instanceof Array) return !!val.length;
-    return !!val;
+function isTruthy (val) {
+  return !isFalsy(val)
 }
 
-function isFalsy(val) {
-    return !isTruthy(val);
+function isFalsy (val) {
+  return val === false || undefined === val || val === null
 }
 
 module.exports = {
-    evalExp, evalValue, isTruthy, isFalsy
-};
+  evalExp, evalValue, isTruthy, isFalsy
+}

src/tag.js

@@ -1,73 +1,63 @@
-const lexical = require('./lexical.js');
-const _ = require('./util/underscore.js');
-const Promise = require('any-promise');
-const Syntax = require('./syntax.js');
-const assert = require('./util/assert.js');
+const lexical = require('./lexical.js')
+const Promise = require('any-promise')
+const Syntax = require('./syntax.js')
+const assert = require('./util/assert.js')
 
-function hash(markup, scope) {
-    var obj = {},
-        match;
-    lexical.hashCapture.lastIndex = 0;
-    while (match = lexical.hashCapture.exec(markup)) {
-        var k = match[1],
-            v = match[2];
-        obj[k] = Syntax.evalValue(v, scope);
-    }
-    return obj;
+function hash (markup, scope) {
+  var obj = {}
+  var match
+  lexical.hashCapture.lastIndex = 0
+  while ((match = lexical.hashCapture.exec(markup))) {
+    var k = match[1]
+    var v = match[2]
+    obj[k] = Syntax.evalValue(v, scope)
+  }
+  return obj
 }
 
-module.exports = function() {
-    var tagImpls = {};
+module.exports = function () {
+  var tagImpls = {}
 
-    var _tagInstance = {
-        render: function(scope) {
-            var obj = hash(this.token.args, scope);
-            var impl = this.tagImpl;
-            if (typeof impl.render !== 'function') {
-                return Promise.resolve('');
-            }
-            return Promise.resolve()
-                .then(() => typeof impl.render === 'function' ?
-                    impl.render(scope, obj) : '')
-                .catch(function(e) {
-                    if (_.isError(e)) {
-                        throw e;
-                    }
-                    var msg = `Please reject with an Error in ${impl.render}, got ${e}`;
-                    throw new Error(msg);
-                });
-        },
-        parse: function(token, tokens) {
-            this.type = 'tag';
-            this.token = token;
-            this.name = token.name;
+  var _tagInstance = {
+    render: function (scope) {
+      var obj = hash(this.token.args, scope)
+      var impl = this.tagImpl
+      if (typeof impl.render !== 'function') {
+        return Promise.resolve('')
+      }
+      return Promise.resolve().then(() => impl.render(scope, obj))
+    },
+    parse: function (token, tokens) {
+      this.type = 'tag'
+      this.token = token
+      this.name = token.name
 
-            var tagImpl = tagImpls[this.name];
-            assert(tagImpl, `tag ${this.name} not found`);
-            this.tagImpl = Object.create(tagImpl);
-            if (this.tagImpl.parse) {
-                this.tagImpl.parse(token, tokens);
-            }
-        }
-    };
-
-    function register(name, tag) {
-        tagImpls[name] = tag;
+      var tagImpl = tagImpls[this.name]
+      assert(tagImpl, `tag ${this.name} not found`)
+      this.tagImpl = Object.create(tagImpl)
+      if (this.tagImpl.parse) {
+        this.tagImpl.parse(token, tokens)
+      }
     }
+  }
 
-    function construct(token, tokens) {
-        var instance = Object.create(_tagInstance);
-        instance.parse(token, tokens);
-        return instance;
-    }
+  function register (name, tag) {
+    tagImpls[name] = tag
+  }
 
-    function clear() {
-        tagImpls = {};
-    }
+  function construct (token, tokens) {
+    var instance = Object.create(_tagInstance)
+    instance.parse(token, tokens)
+    return instance
+  }
 
-    return {
-        construct,
-        register,
-        clear
-    };
-};
+  function clear () {
+    tagImpls = {}
+  }
+
+  return {
+    construct,
+    register,
+    clear
+  }
+}

src/tokenizer.js

@@ -1,73 +1,96 @@
-const lexical = require('./lexical.js');
-const TokenizationError = require('./util/error.js').TokenizationError;
-const _ = require('./util/underscore.js');
-const assert = require('../src/util/assert.js');
+const lexical = require('./lexical.js')
+const TokenizationError = require('./util/error.js').TokenizationError
+const _ = require('./util/underscore.js')
+const assert = require('../src/util/assert.js')
 
-function parse(html) {
-    assert(_.isString(html), 'illegal input type');
+function parse (html, filepath, options) {
+  assert(_.isString(html), 'illegal input type')
 
-    var tokens = [];
-    var syntax = /({%(.*?)%})|({{(.*?)}})/g;
-    var result, htmlFragment, token;
-    var lastMatchEnd = 0, lastMatchBegin = -1, parsedLinesCount = 0;
+  html = whiteSpaceCtrl(html, options)
 
-    while ((result = syntax.exec(html)) !== null) {
-        // passed html fragments
-        if (result.index > lastMatchEnd) {
-            htmlFragment = html.slice(lastMatchEnd, result.index);
-            tokens.push({
-                type: 'html',
-                raw: htmlFragment,
-                value: htmlFragment
-            });
-        }
-        // tag appeared
-        if (result[1]) {
-            token = factory('tag', 1, result);
+  var tokens = []
+  var syntax = /({%-?([\s\S]*?)-?%})|({{-?([\s\S]*?)-?}})/g
+  var result, htmlFragment, token
+  var lastMatchEnd = 0
+  var lastMatchBegin = -1
+  var parsedLinesCount = 0
 
-            var match = token.value.match(lexical.tagLine);
-            if (!match) {
-                throw new TokenizationError(`illegal tag syntax`, token);
-            }
-            token.name = match[1];
-            token.args = match[2];
-
-            tokens.push(token);
-        }
-        // output
-        else { token = factory('output', 3, result);
-            tokens.push(token);
-        }
-        lastMatchEnd = syntax.lastIndex;
+  while ((result = syntax.exec(html)) !== null) {
+    // passed html fragments
+    if (result.index > lastMatchEnd) {
+      htmlFragment = html.slice(lastMatchEnd, result.index)
+      tokens.push({
+        type: 'html',
+        raw: htmlFragment,
+        value: htmlFragment
+      })
     }
+    if (result[1]) {
+      // tag appeared
+      token = factory('tag', 1, result)
 
-    // remaining html
-    if (html.length > lastMatchEnd) {
-        htmlFragment = html.slice(lastMatchEnd, html.length);
-        tokens.push({
-            type: 'html',
-            raw: htmlFragment,
-            value: htmlFragment
-        });
-    }
-    return tokens;
+      var match = token.value.match(lexical.tagLine)
+      if (!match) {
+        throw new TokenizationError(`illegal tag syntax`, token)
+      }
+      token.name = match[1]
+      token.args = match[2]
 
-    function factory(type, offset, match) {
-        return {
-            type: type,
-            raw: match[offset],
-            value: match[offset + 1].trim(),
-            line: getLineNum(match),
-            input: html
-        };
-    }
+      // get last line indentation
+      var lineStart = (htmlFragment || '').split('\n')
+      token.indent = lineStart[lineStart.length - 1].length
 
-    function getLineNum(match) {
-        var lines = match.input.slice(lastMatchBegin + 1, match.index).split('\n');
-        parsedLinesCount += lines.length - 1;
-        lastMatchBegin = match.index;
-        return parsedLinesCount + 1;
+      tokens.push(token)
+    } else {
+      // output
+      token = factory('output', 3, result)
+      tokens.push(token)
     }
+    lastMatchEnd = syntax.lastIndex
+  }
+
+  // remaining html
+  if (html.length > lastMatchEnd) {
+    htmlFragment = html.slice(lastMatchEnd, html.length)
+    tokens.push({
+      type: 'html',
+      raw: htmlFragment,
+      value: htmlFragment
+    })
+  }
+  return tokens
+
+  function factory (type, offset, match) {
+    return {
+      type: type,
+      raw: match[offset],
+      value: match[offset + 1].trim(),
+      line: getLineNum(match),
+      input: html,
+      file: filepath
+    }
+  }
+
+  function getLineNum (match) {
+    var lines = match.input.slice(lastMatchBegin + 1, match.index).split('\n')
+    parsedLinesCount += lines.length - 1
+    lastMatchBegin = match.index
+    return parsedLinesCount + 1
+  }
 }
 
-exports.parse = parse;
+function whiteSpaceCtrl (html, options) {
+  options = options || {}
+  if (options.trim_left) {
+    html = html.replace(/({[{%])-?/g, '$1-')
+  }
+  if (options.trim_right) {
+    html = html.replace(/-?([%}]})/g, '-$1')
+  }
+  var rLeft = options.greedy ? /\s+({[{%]-)/g : /[\t\r ]*({[{%]-)/g
+  var rRight = options.greedy ? /(-[%}]})\s+/g : /(-[%}]})[\t\r ]*\n?/g
+  return html.replace(rLeft, '$1').replace(rRight, '$1')
+}
+
+exports.parse = parse
+exports.whiteSpaceCtrl = whiteSpaceCtrl

src/util/assert.js

@@ -1,13 +1,10 @@
-const AssertionError = require('./error.js').AssertionError;
+const AssertionError = require('./error.js').AssertionError
 
-function assert(predicate, message) {
-    if (!predicate) {
-        if (message instanceof Error) {
-            throw message;
-        }
-        var message = message || `expect ${predicate} to be true`;
-        throw new AssertionError(message);
-    }
+function assert (predicate, message) {
+  if (!predicate) {
+    message = message || `expect ${predicate} to be true`
+    throw new AssertionError(message)
+  }
 }
 
-module.exports = assert;
+module.exports = assert

src/util/error.js

@@ -1,98 +1,106 @@
-const _ = require('./underscore.js');
+const _ = require('./underscore.js')
 
-function TokenizationError(message, token) {
-    if (Error.captureStackTrace) {
-        Error.captureStackTrace(this, this.constructor);
-    }
-    this.name = this.constructor.name;
-
-    this.input = token.input;
-    this.line = token.line;
-
-    var context = mkContext(token.input, token.line);
-    this.message = message + ', line:' + token.line;
-    this.stack = context + '\n' + (this.stack || '');
-}
-TokenizationError.prototype = Object.create(Error.prototype);
-TokenizationError.prototype.constructor = TokenizationError;
-
-function ParseError(e, token) {
-    this.name = this.constructor.name;
-    this.stack = e.stack;
-
-    this.input = token.input;
-    this.line = token.line;
-
-    var context = mkContext(token.input, token.line);
-    this.message = e.message + ', line:' + token.line;
-    this.stack = context + '\n' + (this.stack || '');
-}
-ParseError.prototype = Object.create(Error.prototype);
-ParseError.prototype.constructor = ParseError;
-
-function RenderError(e, tpl) {
-    this.name = this.constructor.name;
-    this.stack = e.stack;
-
-    this.input = tpl.token.input;
-    this.line = tpl.token.line;
-
-    var context = mkContext(tpl.token.input, tpl.token.line);
-    this.message = e.message + ', line:' + tpl.token.line;
-    this.stack = context + '\n' + (e.stack || '');
-}
-RenderError.prototype = Object.create(Error.prototype);
-RenderError.prototype.constructor = RenderError;
-
-function RenderBreakError(message) {
-    if (Error.captureStackTrace) {
-        Error.captureStackTrace(this, this.constructor);
-    }
-    this.name = this.constructor.name;
-    this.message = message || '';
-}
-RenderBreakError.prototype = Object.create(Error.prototype);
-RenderBreakError.prototype.constructor = RenderBreakError;
-
-function AssertionError(message) {
-    if (Error.captureStackTrace) {
-        Error.captureStackTrace(this, this.constructor);
-    }
-    this.name = this.constructor.name;
-    this.message = message;
-}
-AssertionError.prototype = Object.create(Error.prototype);
-AssertionError.prototype.constructor = AssertionError;
-
-function mkContext(input, line) {
-    var lines = input.split('\n');
-    var begin = Math.max(line - 2, 1);
-    var end = Math.min(line + 3, lines.length);
-
-    var context = _
-        .range(begin, end + 1)
-        .map(l => [
-            (l === line) ? '>> ' : '   ',
-            align(l, end),
-            '| ',
-            lines[l - 1]
-        ].join(''))
-        .join('\n');
-
-    return context;
+function initError () {
+  this.name = this.constructor.name
+  if (Error.captureStackTrace) {
+    Error.captureStackTrace(this, this.constructor)
+  }
 }
 
-function align(n, max) {
-    var length = (max + '').length;
-    var str = n + '';
-    var blank = Array(length - str.length).join(' ');
-    return blank + str;
+function initLiquidError (message, token) {
+  initError.call(this)
+
+  this.input = token.input
+  this.line = token.line
+  this.file = token.file
+
+  var context = mkContext(token.input, token.line)
+  this.message = mkMessage(message, token)
+  this.stack = context + '\n' + (this.stack || this.message)
+}
+
+function TokenizationError (message, token) {
+  initLiquidError.call(this, message, token)
+}
+TokenizationError.prototype = Object.create(Error.prototype)
+TokenizationError.prototype.constructor = TokenizationError
+
+function ParseError (e, token) {
+  _.assign(this, e)
+  this.originalError = e
+
+  initLiquidError.call(this, e.message, token)
+}
+ParseError.prototype = Object.create(Error.prototype)
+ParseError.prototype.constructor = ParseError
+
+function RenderError (e, tpl) {
+  // return the original render error
+  if (e instanceof RenderError) {
+    return e
+  }
+  _.assign(this, e)
+  this.originalError = e
+
+  initLiquidError.call(this, e.message, tpl.token)
+}
+RenderError.prototype = Object.create(Error.prototype)
+RenderError.prototype.constructor = RenderError
+
+function RenderBreakError (message) {
+  initError.call(this)
+  this.message = message + ''
+}
+RenderBreakError.prototype = Object.create(Error.prototype)
+RenderBreakError.prototype.constructor = RenderBreakError
+
+function AssertionError (message) {
+  initError.call(this)
+  this.message = message + ''
+}
+AssertionError.prototype = Object.create(Error.prototype)
+AssertionError.prototype.constructor = AssertionError
+
+function mkContext (input, line) {
+  var lines = input.split('\n')
+  var begin = Math.max(line - 2, 1)
+  var end = Math.min(line + 3, lines.length)
+
+  var context = _
+    .range(begin, end + 1)
+    .map(l => [
+      (l === line) ? '>> ' : '   ',
+      align(l, end),
+      '| ',
+      lines[l - 1]
+    ].join(''))
+    .join('\n')
+
+  return context
+}
+
+function align (n, max) {
+  var length = (max + '').length
+  var str = n + ''
+  var blank = Array(length - str.length).join(' ')
+  return blank + str
+}
+
+function mkMessage (msg, token) {
+  msg = msg || ''
+  if (token.file) {
+    msg += ', file:' + token.file
+  }
+  if (token.line) {
+    msg += ', line:' + token.line
+  }
+  return msg
 }
 
 module.exports = {
-    TokenizationError,
-    ParseError,
-    RenderBreakError,
-    AssertionError,
-    RenderError
-};
+  TokenizationError,
+  ParseError,
+  RenderBreakError,
+  AssertionError,
+  RenderError
+}

src/util/fs.js

@@ -1,20 +1,20 @@
-const fs = require('fs');
+const fs = require('fs')
 
-function readFileAsync(filepath) {
-    return new Promise(function(resolve, reject) {
-        fs.readFile(filepath, 'utf8', function(err, content) {
-            err ? reject(err) : resolve(content);
-        });
-    });
+function readFileAsync (filepath) {
+  return new Promise(function (resolve, reject) {
+    fs.readFile(filepath, 'utf8', function (err, content) {
+      err ? reject(err) : resolve(content)
+    })
+  })
 };
 
-function statFileAsync(path) {
-    return new Promise(function(resolve, reject) {
-        fs.stat(path, (err, stat) => err ? reject(err) : resolve(stat))
-    });
+function statFileAsync (path) {
+  return new Promise(function (resolve, reject) {
+    fs.stat(path, (err, stat) => err ? reject(err) : resolve(stat))
+  })
 };
 
 module.exports = {
-    readFileAsync,
-    statFileAsync
-};
+  readFileAsync,
+  statFileAsync
+}

src/util/promise.js

@@ -1,35 +1,35 @@
-const Promise = require('any-promise');
+const Promise = require('any-promise')
 
 /*
  * Call functions in serial until someone resolved.
  * @param {Array} iterable the array to iterate with.
  * @param {Array} iteratee returns a new promise.
- * The iteratee is invoked with three arguments: (value, index, iterable). 
+ * The iteratee is invoked with three arguments: (value, index, iterable).
  */
-function anySeries(iterable, iteratee) {
-    var ret = Promise.reject(new Error('init'));
-    iterable.forEach(function(item, idx) {
-        ret = ret.catch(e => iteratee(item, idx, iterable));
-    });
-    return ret;
+function anySeries (iterable, iteratee) {
+  var ret = Promise.reject(new Error('init'))
+  iterable.forEach(function (item, idx) {
+    ret = ret.catch(e => iteratee(item, idx, iterable))
+  })
+  return ret
 }
 
 /*
  * Call functions in serial until someone rejected.
  * @param {Array} iterable the array to iterate with.
  * @param {Array} iteratee returns a new promise.
- * The iteratee is invoked with three arguments: (value, index, iterable). 
+ * The iteratee is invoked with three arguments: (value, index, iterable).
  */
-function mapSeries(iterable, iteratee) {
-    var ret = Promise.resolve('init');
-    var result = [];
-    iterable.forEach(function(item, idx) {
-        ret = ret
-            .then(() => iteratee(item, idx, iterable))
-            .then(x => result.push(x));
-    });
-    return ret.then(() => result);
+function mapSeries (iterable, iteratee) {
+  var ret = Promise.resolve('init')
+  var result = []
+  iterable.forEach(function (item, idx) {
+    ret = ret
+      .then(() => iteratee(item, idx, iterable))
+      .then(x => result.push(x))
+  })
+  return ret.then(() => result)
 }
 
-exports.anySeries = anySeries;
-exports.mapSeries = mapSeries;
+exports.anySeries = anySeries
+exports.mapSeries = mapSeries

src/util/strftime.js

@@ -1,200 +1,200 @@
 var monthNames = [
-    "January", "February", "March", "April", "May", "June", "July", "August",
-    "September", "October", "November", "December"
-];
+  'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August',
+  'September', 'October', 'November', 'December'
+]
 var monthNamesShort = [
-    "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct",
-    "Nov", "Dec"
-];
+  'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct',
+  'Nov', 'Dec'
+]
 var dayNames = [
-    "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
-];
-var dayNamesShort = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
+  'Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'
+]
+var dayNamesShort = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat']
 var suffixes = {
-    1: 'st',
-    2: 'nd',
-    3: 'rd',
-    'default': 'th'
-};
+  1: 'st',
+  2: 'nd',
+  3: 'rd',
+  'default': 'th'
+}
 
 // prototype extensions
 var _date = {
-    daysInMonth: function(d) {
-        var feb = _date.isLeapYear(d) ? 29 : 28;
-        return [31, feb, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
-    },
+  daysInMonth: function (d) {
+    var feb = _date.isLeapYear(d) ? 29 : 28
+    return [31, feb, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
+  },
 
-    getDayOfYear: function(d) {
-        var num = 0;
-        for (var i = 0; i < d.getMonth(); ++i) {
-            num += _date.daysInMonth(d)[i];
-        }
-        return num + d.getDate();
-    },
-
-    // Startday is an integer of which day to start the week measuring from
-    // TODO: that comment was retarted. fix it.
-    getWeekOfYear: function(d, startDay) {
-        // Skip to startDay of this week
-        var now = this.getDayOfYear(d) + (startDay - d.getDay());
-        // Find the first startDay of the year
-        var jan1 = new Date(d.getFullYear(), 0, 1);
-        var then = (7 - jan1.getDay() + startDay);
-        return _number.pad(Math.floor((now - then) / 7) + 1, 2);
-    },
-
-    isLeapYear: function(d) {
-        var year = d.getFullYear();
-        return !!((year & 3) === 0 && (year % 100 || (year % 400 === 0 && year)));
-    },
-
-    getSuffix: function(d) {
-        var str = d.getDate().toString();
-        var index = parseInt(str.slice(-1));
-        return suffixes[index] || suffixes['default'];
-    },
-
-    century: function(d) {
-        return parseInt(d.getFullYear().toString().substring(0, 2), 10);
+  getDayOfYear: function (d) {
+    var num = 0
+    for (var i = 0; i < d.getMonth(); ++i) {
+      num += _date.daysInMonth(d)[i]
     }
-};
+    return num + d.getDate()
+  },
+
+  // Startday is an integer of which day to start the week measuring from
+  // TODO: that comment was retarted. fix it.
+  getWeekOfYear: function (d, startDay) {
+    // Skip to startDay of this week
+    var now = this.getDayOfYear(d) + (startDay - d.getDay())
+    // Find the first startDay of the year
+    var jan1 = new Date(d.getFullYear(), 0, 1)
+    var then = (7 - jan1.getDay() + startDay)
+    return _number.pad(Math.floor((now - then) / 7) + 1, 2)
+  },
+
+  isLeapYear: function (d) {
+    var year = d.getFullYear()
+    return !!((year & 3) === 0 && (year % 100 || (year % 400 === 0 && year)))
+  },
+
+  getSuffix: function (d) {
+    var str = d.getDate().toString()
+    var index = parseInt(str.slice(-1))
+    return suffixes[index] || suffixes['default']
+  },
+
+  century: function (d) {
+    return parseInt(d.getFullYear().toString().substring(0, 2), 10)
+  }
+}
 
 var _number = {
-    pad: function(value, size, ch) {
-        if (!ch) ch = '0';
-        var result = value.toString();
-        var pad = size - result.length;
+  pad: function (value, size, ch) {
+    if (!ch) ch = '0'
+    var result = value.toString()
+    var pad = size - result.length
 
-        while (pad-- > 0) {
-            result = ch + result;
-        }
-
-        return result;
+    while (pad-- > 0) {
+      result = ch + result
     }
-};
 
+    return result
+  }
+}
 
-var format_codes = {
-    a: function(d) {
-        return dayNamesShort[d.getDay()];
-    },
-    A: function(d) {
-        return dayNames[d.getDay()];
-    },
-    b: function(d) {
-        return monthNamesShort[d.getMonth()];
-    },
-    B: function(d) {
-        return monthNames[d.getMonth()];
-    },
-    c: function(d) {
-        return d.toLocaleString();
-    },
-    C: function(d) {
-        return _date.century(d);
-    },
-    d: function(d) {
-        return _number.pad(d.getDate(), 2);
-    },
-    e: function(d) {
-        return _number.pad(d.getDate(), 2, ' ');
-    },
-    H: function(d) {
-        return _number.pad(d.getHours(), 2);
-    },
-    I: function(d) {
-        return _number.pad(d.getHours() % 12 || 12, 2);
-    },
-    j: function(d) {
-        return _number.pad(_date.getDayOfYear(d), 3);
-    },
-    k: function(d) {
-        return _number.pad(d.getHours(), 2, ' ');
-    },
-    l: function(d) {
-        return _number.pad(d.getHours() % 12 || 12, 2, ' ');
-    },
-    L: function(d) {
-        return _number.pad(d.getMilliseconds(), 3);
-    },
-    m: function(d) {
-        return _number.pad(d.getMonth() + 1, 2);
-    },
-    M: function(d) {
-        return _number.pad(d.getMinutes(), 2);
-    },
-    p: function(d) {
-        return (d.getHours() < 12 ? 'AM' : 'PM');
-    },
-    P: function(d) {
-        return (d.getHours() < 12 ? 'am' : 'pm');
-    },
-    q: function(d) {
-        return _date.getSuffix(d);
-    },
-    s: function(d) {
-        return Math.round(d.valueOf() / 1000);
-    },
-    S: function(d) {
-        return _number.pad(d.getSeconds(), 2);
-    },
-    u: function(d) {
-        return d.getDay() || 7;
-    },
-    U: function(d) {
-        return _date.getWeekOfYear(d, 0);
-    },
-    w: function(d) {
-        return d.getDay();
-    },
-    W: function(d) {
-        return _date.getWeekOfYear(d, 1);
-    },
-    x: function(d) {
-        return d.toLocaleDateString();
-    },
-    X: function(d) {
-        return d.toLocaleTimeString();
-    },
-    y: function(d) {
-        return d.getFullYear().toString().substring(2, 4);
-    },
-    Y: function(d) {
-        return d.getFullYear();
-    },
-    z: function(d) {
-        var tz = d.getTimezoneOffset() / 60 * 100;
-        return (tz > 0 ? '-' : '+') + _number.pad(Math.abs(tz), 4);
-    },
-    "%": function() {
-        return '%';
+var formatCodes = {
+  a: function (d) {
+    return dayNamesShort[d.getDay()]
+  },
+  A: function (d) {
+    return dayNames[d.getDay()]
+  },
+  b: function (d) {
+    return monthNamesShort[d.getMonth()]
+  },
+  B: function (d) {
+    return monthNames[d.getMonth()]
+  },
+  c: function (d) {
+    return d.toLocaleString()
+  },
+  C: function (d) {
+    return _date.century(d)
+  },
+  d: function (d) {
+    return _number.pad(d.getDate(), 2)
+  },
+  e: function (d) {
+    return _number.pad(d.getDate(), 2, ' ')
+  },
+  H: function (d) {
+    return _number.pad(d.getHours(), 2)
+  },
+  I: function (d) {
+    return _number.pad(d.getHours() % 12 || 12, 2)
+  },
+  j: function (d) {
+    return _number.pad(_date.getDayOfYear(d), 3)
+  },
+  k: function (d) {
+    return _number.pad(d.getHours(), 2, ' ')
+  },
+  l: function (d) {
+    return _number.pad(d.getHours() % 12 || 12, 2, ' ')
+  },
+  L: function (d) {
+    return _number.pad(d.getMilliseconds(), 3)
+  },
+  m: function (d) {
+    return _number.pad(d.getMonth() + 1, 2)
+  },
+  M: function (d) {
+    return _number.pad(d.getMinutes(), 2)
+  },
+  p: function (d) {
+    return (d.getHours() < 12 ? 'AM' : 'PM')
+  },
+  P: function (d) {
+    return (d.getHours() < 12 ? 'am' : 'pm')
+  },
+  q: function (d) {
+    return _date.getSuffix(d)
+  },
+  s: function (d) {
+    return Math.round(d.valueOf() / 1000)
+  },
+  S: function (d) {
+    return _number.pad(d.getSeconds(), 2)
+  },
+  u: function (d) {
+    return d.getDay() || 7
+  },
+  U: function (d) {
+    return _date.getWeekOfYear(d, 0)
+  },
+  w: function (d) {
+    return d.getDay()
+  },
+  W: function (d) {
+    return _date.getWeekOfYear(d, 1)
+  },
+  x: function (d) {
+    return d.toLocaleDateString()
+  },
+  X: function (d) {
+    return d.toLocaleTimeString()
+  },
+  y: function (d) {
+    return d.getFullYear().toString().substring(2, 4)
+  },
+  Y: function (d) {
+    return d.getFullYear()
+  },
+  z: function (d) {
+    var tz = d.getTimezoneOffset() / 60 * 100
+    console.log('tz', tz)
+    return (tz > 0 ? '-' : '+') + _number.pad(Math.abs(tz), 4)
+  },
+  '%': function () {
+    return '%'
+  }
+}
+formatCodes.h = formatCodes.b
+formatCodes.N = formatCodes.L
+
+var strftime = function (d, format) {
+  var output = ''
+  var remaining = format
+
+  while (true) {
+    var r = /%./g
+    var results = r.exec(remaining)
+
+    // No more format codes. Add the remaining text and return
+    if (!results) {
+      return output + remaining
     }
-};
-format_codes.h = format_codes.b;
-format_codes.N = format_codes.L;
 
-var strftime = function(d, format) {
-    var output = '';
-    var remaining = format;
+    // Add the preceding text
+    output += remaining.slice(0, r.lastIndex - 2)
+    remaining = remaining.slice(r.lastIndex)
 
-    while (true) {
-        var r = /%./g;
-        var results = r.exec(remaining);
+    // Add the format code
+    var ch = results[0].charAt(1)
+    var func = formatCodes[ch]
+    output += func ? func.call(this, d) : '%' + ch
+  }
+}
 
-        // No more format codes. Add the remaining text and return
-        if (!results) {
-            return output + remaining;
-        }
-
-        // Add the preceding text
-        output += remaining.slice(0, r.lastIndex - 2);
-        remaining = remaining.slice(r.lastIndex);
-
-        // Add the format code
-        var ch = results[0].charAt(1);
-        var func = format_codes[ch];
-        output += func ? func.call(this, d) : '%' + ch;
-    }
-};
-
-module.exports = strftime;
+module.exports = strftime

src/util/underscore.js

@@ -1,41 +1,52 @@
+const toStr = Object.prototype.toString
+
 /*
  * Checks if value is classified as a String primitive or object.
  * @param {any} value The value to check.
  * @return {Boolean} Returns true if value is a string, else false.
  */
-function isString(value) {
-    return value instanceof String || typeof value === 'string';
+function isString (value) {
+  return value instanceof String || typeof value === 'string'
 }
 
-function isError(value) {
-    var signature = Object.prototype.toString.call(value);
-    // [object XXXError]
-    return signature.substr(-6, 5) === 'Error' ||
-        (typeof value.message == 'string' && typeof value.name == 'string');
+function isNil (value) {
+  return value === null || value === undefined
+}
+
+function isArray (value) {
+  // be compatible with IE 8
+  return toStr.call(value) === '[object Array]'
+}
+
+function isError (value) {
+  var signature = Object.prototype.toString.call(value)
+  // [object XXXError]
+  return signature.substr(-6, 5) === 'Error' ||
+        (typeof value.message === 'string' && typeof value.name === 'string')
 }
 
 /*
- * Iterates over own enumerable string keyed properties of an object and invokes iteratee for each property. 
- * The iteratee is invoked with three arguments: (value, key, object). 
+ * Iterates over own enumerable string keyed properties of an object and invokes iteratee for each property.
+ * The iteratee is invoked with three arguments: (value, key, object).
  * Iteratee functions may exit iteration early by explicitly returning false.
  * @param {Object} object The object to iterate over.
  * @param {Function} iteratee The function invoked per iteration.
  * @return {Object} Returns object.
  */
-function forOwn(object, iteratee) {
-    object = object || {};
-    for (var k in object) {
-        if (object.hasOwnProperty(k)) {
-            if (iteratee(object[k], k, object) === false) break;
-        }
+function forOwn (object, iteratee) {
+  object = object || {}
+  for (var k in object) {
+    if (object.hasOwnProperty(k)) {
+      if (iteratee(object[k], k, object) === false) break
     }
-    return object;
+  }
+  return object
 }
 
 /*
- * Assigns own enumerable string keyed properties of source objects to the destination object. 
- * Source objects are applied from left to right. 
- * Subsequent sources overwrite property assignments of previous sources.  
+ * Assigns own enumerable string keyed properties of source objects to the destination object.
+ * Source objects are applied from left to right.
+ * Subsequent sources overwrite property assignments of previous sources.
  *
  * Note: This method mutates object and is loosely based on Object.assign.
  *
@@ -43,89 +54,85 @@ function forOwn(object, iteratee) {
  * @param {...Object} sources The source objects.
  * @return {Object} Returns object.
  */
-function assign(object) {
-    object = isObject(object) ? object : {};
-    var srcs = Array.prototype.slice.call(arguments, 1);
-    srcs.forEach(function(src) {
-        _assignBinary(object, src);
-    });
-    return object;
+function assign (object) {
+  object = isObject(object) ? object : {}
+  var srcs = Array.prototype.slice.call(arguments, 1)
+  srcs.forEach(function (src) {
+    _assignBinary(object, src)
+  })
+  return object
 }
 
-function _assignBinary(dst, src) {
-    if (!dst) return dst;
-    forOwn(src, function(v, k) {
-        dst[k] = v;
-    });
-    return dst;
+function _assignBinary (dst, src) {
+  forOwn(src, function (v, k) {
+    dst[k] = v
+  })
+  return dst
 }
 
-
-function isArray(value) {
-    return value instanceof Array;
+function echo (prefix) {
+  return v => {
+    console.log('[' + prefix + ']', v)
+    return v
+  }
 }
 
-function echo(prefix) {
-    return v => {
-        console.log('[' + prefix + ']', v);
-        return v;
-    };
-}
-
-function uniq(arr) {
-    var u = {},
-        a = [];
-    for (var i = 0, l = arr.length; i < l; ++i) {
-        if (u.hasOwnProperty(arr[i])) {
-            continue;
-        }
-        a.push(arr[i]);
-        u[arr[i]] = 1;
+function uniq (arr) {
+  var u = {}
+  var a = []
+  for (var i = 0, l = arr.length; i < l; ++i) {
+    if (u.hasOwnProperty(arr[i])) {
+      continue
     }
-    return a;
+    a.push(arr[i])
+    u[arr[i]] = 1
+  }
+  return a
 }
 
 /*
- * Checks if value is the language type of Object. 
+ * Checks if value is the language type of Object.
  * (e.g. arrays, functions, objects, regexes, new Number(0), and new String(''))
  * @param {any} value The value to check.
  * @return {Boolean} Returns true if value is an object, else false.
  */
-function isObject(value) {
-    return value !== null && typeof value === 'object';
+function isObject (value) {
+  var type = typeof value
+  return value != null && (type === 'object' || type === 'function')
 }
 
 /*
- * A function to create flexibly-numbered lists of integers, 
- * handy for each and map loops. start, if omitted, defaults to 0; step defaults to 1. 
- * Returns a list of integers from start (inclusive) to stop (exclusive), 
- * incremented (or decremented) by step, exclusive. 
- * Note that ranges that stop before they start are considered to be zero-length instead of 
+ * A function to create flexibly-numbered lists of integers,
+ * handy for each and map loops. start, if omitted, defaults to 0; step defaults to 1.
+ * Returns a list of integers from start (inclusive) to stop (exclusive),
+ * incremented (or decremented) by step, exclusive.
+ * Note that ranges that stop before they start are considered to be zero-length instead of
  * negative — if you'd like a negative range, use a negative step.
  */
-function range(start, stop, step) {
-    if (arguments.length === 1) {
-        stop = start;
-        start = 0;
-    }
-    step = step || 1;
+function range (start, stop, step) {
+  if (arguments.length === 1) {
+    stop = start
+    start = 0
+  }
+  step = step || 1
 
-    var arr = [];
-    for (var i = start; i < stop; i += step) {
-        arr.push(i);
-    }
-    return arr;
+  var arr = []
+  for (var i = start; i < stop; i += step) {
+    arr.push(i)
+  }
+  return arr
 }
 
-exports.isString = isString;
-exports.isArray = isArray;
-exports.isObject = isObject;
-exports.isError = isError;
+exports.isString = isString
+exports.isObject = isObject
+exports.isArray = isArray
+exports.isNil = isNil
+exports.isError = isError
 
-exports.range = range;
+exports.range = range
 
-exports.forOwn = forOwn;
-exports.assign = assign;
-exports.uniq = uniq;
+exports.forOwn = forOwn
+exports.assign = assign
+exports.uniq = uniq
 
-exports.echo = echo;
+exports.echo = echo

tags/assign.js

@@ -1,22 +1,20 @@
-const Liquid = require('..');
-const lexical = Liquid.lexical;
-const Promise = require('any-promise');
-const re = new RegExp(`(${lexical.identifier.source})\\s*=(.*)`);
-const assert = require('../src/util/assert.js');
+const Liquid = require('..')
+const lexical = Liquid.lexical
+const Promise = require('any-promise')
+const re = new RegExp(`(${lexical.identifier.source})\\s*=(.*)`)
+const assert = require('../src/util/assert.js')
 
-module.exports = function(liquid) {
-
-    liquid.registerTag('assign', {
-        parse: function(token){
-            var match = token.args.match(re);
-            assert(match, `illegal token ${token.raw}`);
-            this.key = match[1];
-            this.value = match[2];
-        },
-        render: function(scope) {
-            scope.set(this.key, liquid.evalOutput(this.value, scope));
-            return Promise.resolve('');
-        }
-    });
-
-};
+module.exports = function (liquid) {
+  liquid.registerTag('assign', {
+    parse: function (token) {
+      var match = token.args.match(re)
+      assert(match, `illegal token ${token.raw}`)
+      this.key = match[1]
+      this.value = match[2]
+    },
+    render: function (scope) {
+      scope.set(this.key, liquid.evalOutput(this.value, scope))
+      return Promise.resolve('')
+    }
+  })
+}

tags/case.js

@@ -1,45 +1,41 @@
-const Liquid = require('..');
-const assert = require('../src/util/assert.js');
+const Liquid = require('..')
 
-module.exports = function(liquid) {
-    liquid.registerTag('case', {
+module.exports = function (liquid) {
+  liquid.registerTag('case', {
 
-        parse: function(tagToken, remainTokens) {
-            this.cond = tagToken.args;
-            this.cases = [];
-            this.elseTemplates = [];
+    parse: function (tagToken, remainTokens) {
+      this.cond = tagToken.args
+      this.cases = []
+      this.elseTemplates = []
 
-            var p = [],
-                stream = liquid.parser.parseStream(remainTokens)
-                .on('tag:when', token => {
-                    if (!this.cases[token.args]) {
-                        this.cases.push({
-                            val: token.args,
-                            templates: p = []
-                        });
-                    }
-                })
-                .on('tag:else', token => p = this.elseTemplates)
-                .on('tag:endcase', token => stream.stop())
-                .on('template', tpl => p.push(tpl))
-                .on('end', x => {
-                    throw new Error(`tag ${tagToken.raw} not closed`);
-                });
+      var p = []
+      var stream = liquid.parser.parseStream(remainTokens)
+        .on('tag:when', token => {
+          this.cases.push({
+            val: token.args,
+            templates: p = []
+          })
+        })
+        .on('tag:else', () => (p = this.elseTemplates))
+        .on('tag:endcase', token => stream.stop())
+        .on('template', tpl => p.push(tpl))
+        .on('end', x => {
+          throw new Error(`tag ${tagToken.raw} not closed`)
+        })
 
-            stream.start();
-        },
+      stream.start()
+    },
 
-        render: function(scope, hash) {
-            for (var i = 0; i < this.cases.length; i++) {
-                var branch = this.cases[i];
-                var val = Liquid.evalExp(branch.val, scope);
-                var cond = Liquid.evalExp(this.cond, scope);
-                if (val === cond) {
-                    return liquid.renderer.renderTemplates(branch.templates, scope);
-                }
-            }
-            return liquid.renderer.renderTemplates(this.elseTemplates, scope);
+    render: function (scope, hash) {
+      for (var i = 0; i < this.cases.length; i++) {
+        var branch = this.cases[i]
+        var val = Liquid.evalExp(branch.val, scope)
+        var cond = Liquid.evalExp(this.cond, scope)
+        if (val === cond) {
+          return liquid.renderer.renderTemplates(branch.templates, scope)
         }
-
-    });
-};
+      }
+      return liquid.renderer.renderTemplates(this.elseTemplates, scope)
+    }
+  })
+}

tags/for.js

@@ -1,88 +1,97 @@
-const Liquid = require('..');
-const lexical = Liquid.lexical;
-const mapSeries = require('../src/util/promise.js').mapSeries;
-const RenderBreakError = Liquid.Types.RenderBreakError;
-const assert = require('../src/util/assert.js');
+const Liquid = require('..')
+const lexical = Liquid.lexical
+const mapSeries = require('../src/util/promise.js').mapSeries
+const _ = require('../src/util/underscore.js')
+const RenderBreakError = Liquid.Types.RenderBreakError
+const assert = require('../src/util/assert.js')
 const re = new RegExp(`^(${lexical.identifier.source})\\s+in\\s+` +
     `(${lexical.value.source})` +
     `(?:\\s+${lexical.hash.source})*` +
-    `(?:\\s+(reversed))?$`);
+    `(?:\\s+(reversed))?` +
+    `(?:\\s+${lexical.hash.source})*$`)
 
-module.exports = function(liquid) {
-    liquid.registerTag('for', {
+module.exports = function (liquid) {
+  liquid.registerTag('for', {
 
-        parse: function(tagToken, remainTokens) {
-            var match = re.exec(tagToken.args);
-            assert(match, `illegal tag: ${tagToken.raw}`);
-            this.variable = match[1];
-            this.collection = match[2];
-            this.reversed = !!match[3];
+    parse: function (tagToken, remainTokens) {
+      var match = re.exec(tagToken.args)
+      assert(match, `illegal tag: ${tagToken.raw}`)
+      this.variable = match[1]
+      this.collection = match[2]
+      this.reversed = !!match[3]
 
-            this.templates = [];
-            this.elseTemplates = [];
+      this.templates = []
+      this.elseTemplates = []
 
-            var p, stream = liquid.parser.parseStream(remainTokens)
-                .on('start', () => p = this.templates)
-                .on('tag:else', () => p = this.elseTemplates)
-                .on('tag:endfor', () => stream.stop())
-                .on('template', tpl => p.push(tpl))
-                .on('end', () => {
-                    throw new Error(`tag ${tagToken.raw} not closed`);
-                });
+      var p
+      var stream = liquid.parser.parseStream(remainTokens)
+        .on('start', () => (p = this.templates))
+        .on('tag:else', () => (p = this.elseTemplates))
+        .on('tag:endfor', () => stream.stop())
+        .on('template', tpl => p.push(tpl))
+        .on('end', () => {
+          throw new Error(`tag ${tagToken.raw} not closed`)
+        })
 
-            stream.start();
-        },
+      stream.start()
+    },
 
-        render: function(scope, hash) {
-            var collection = Liquid.evalExp(this.collection, scope);
-            if (Liquid.isFalsy(collection)) {
-                return liquid.renderer.renderTemplates(this.elseTemplates, scope);
-            }
+    render: function (scope, hash) {
+      var collection = Liquid.evalExp(this.collection, scope)
 
-            var length = collection.length;
-            var offset = hash.offset || 0;
-            var limit = (hash.limit === undefined) ? collection.length : hash.limit;
-
-            collection = collection.slice(offset, offset + limit);
-            if (this.reversed) collection.reverse();
-
-            var contexts = collection.map((item, i) => {
-                var ctx = {};
-                ctx[this.variable] = item;
-                ctx.forloop = {
-                    first: i === 0,
-                    index: i + 1,
-                    index0: i,
-                    last: i === length - 1,
-                    length: length,
-                    rindex: length - i,
-                    rindex0: length - i - 1,
-                    stop: false,
-                    skip: false
-                };
-                return ctx;
-            });
-
-            var html = '';
-            return mapSeries(contexts, (context) => {
-                scope.push(context);
-                return liquid.renderer
-                    .renderTemplates(this.templates, scope)
-                    .then(partial => html += partial)
-                    .catch(e => {
-                        if (e instanceof RenderBreakError) {
-                            html += e.resolvedHTML;
-                            if (e.message === 'continue') return;
-                        }
-                        throw e;
-                    })
-                    .then(() => scope.pop());
-            }).catch((e) => {
-                if (e instanceof RenderBreakError && e.message === 'break') {
-                    return;
-                }
-                throw e;
-            }).then(() => html);
+      if (!Array.isArray(collection)) {
+        if (_.isString(collection) && collection.length > 0) {
+          collection = [collection]
+        } else if (_.isObject(collection)) {
+          collection = Object.keys(collection).map((key) => [key, collection[key]])
         }
-    });
-};
+      }
+      if (!Array.isArray(collection) || !collection.length) {
+        return liquid.renderer.renderTemplates(this.elseTemplates, scope)
+      }
+
+      var length = collection.length
+      var offset = hash.offset || 0
+      var limit = (hash.limit === undefined) ? collection.length : hash.limit
+
+      collection = collection.slice(offset, offset + limit)
+      if (this.reversed) collection.reverse()
+
+      var contexts = collection.map((item, i) => {
+        var ctx = {}
+        ctx[this.variable] = item
+        ctx.forloop = {
+          first: i === 0,
+          index: i + 1,
+          index0: i,
+          last: i === length - 1,
+          length: length,
+          rindex: length - i,
+          rindex0: length - i - 1
+        }
+        return ctx
+      })
+
+      var html = ''
+      return mapSeries(contexts, (context) => {
+        return Promise.resolve()
+          .then(() => scope.push(context))
+          .then(() => liquid.renderer.renderTemplates(this.templates, scope))
+          .then(partial => (html += partial))
+          .catch(e => {
+            if (e instanceof RenderBreakError) {
+              html += e.resolvedHTML
+              if (e.message === 'continue') return
+            }
+            throw e
+          })
+          .then(() => scope.pop())
+      }).catch((e) => {
+        if (e instanceof RenderBreakError && e.message === 'break') {
+          return
+        }
+        throw e
+      }).then(() => html)
+    }
+  })
+}

tags/if.js

@@ -1,46 +1,43 @@
-const Liquid = require('..');
+const Liquid = require('..')
 
-module.exports = function(liquid) {
-    liquid.registerTag('if', {
+module.exports = function (liquid) {
+  liquid.registerTag('if', {
 
-        parse: function(tagToken, remainTokens) {
+    parse: function (tagToken, remainTokens) {
+      this.branches = []
+      this.elseTemplates = []
 
-            this.branches = [];
-            this.elseTemplates = [];
+      var p
+      var stream = liquid.parser.parseStream(remainTokens)
+        .on('start', () => this.branches.push({
+          cond: tagToken.args,
+          templates: (p = [])
+        }))
+        .on('tag:elsif', token => {
+          this.branches.push({
+            cond: token.args,
+            templates: p = []
+          })
+        })
+        .on('tag:else', () => (p = this.elseTemplates))
+        .on('tag:endif', token => stream.stop())
+        .on('template', tpl => p.push(tpl))
+        .on('end', x => {
+          throw new Error(`tag ${tagToken.raw} not closed`)
+        })
 
-            var p, stream = liquid.parser.parseStream(remainTokens)
-                .on('start', x => this.branches.push({
-                    cond: tagToken.args,
-                    templates: p = []
-                }))
-                .on('tag:elsif', token => {
-                    if (!this.branches[token.args]) {
-                        this.branches.push({
-                            cond: token.args,
-                            templates: p = []
-                        });
-                    }
-                })
-                .on('tag:else', token => p = this.elseTemplates)
-                .on('tag:endif', token => stream.stop())
-                .on('template', tpl => p.push(tpl))
-                .on('end', x => {
-                    throw new Error(`tag ${tagToken.raw} not closed`);
-                });
+      stream.start()
+    },
 
-            stream.start();
-        },
-
-        render: function(scope, hash) {
-            for (var i = 0; i < this.branches.length; i++) {
-                var branch = this.branches[i];
-                var cond = Liquid.evalExp(branch.cond, scope);
-                if (Liquid.isTruthy(cond)) {
-                    return liquid.renderer.renderTemplates(branch.templates, scope);
-                }
-            }
-            return liquid.renderer.renderTemplates(this.elseTemplates, scope);
+    render: function (scope, hash) {
+      for (var i = 0; i < this.branches.length; i++) {
+        var branch = this.branches[i]
+        var cond = Liquid.evalExp(branch.cond, scope)
+        if (Liquid.isTruthy(cond)) {
+          return liquid.renderer.renderTemplates(branch.templates, scope)
         }
-
-    });
-};
+      }
+      return liquid.renderer.renderTemplates(this.elseTemplates, scope)
+    }
+  })
+}

tags/include.js

@@ -1,42 +1,40 @@
-const Liquid = require('..');
-const lexical = Liquid.lexical;
-const withRE = new RegExp(`with\\s+(${lexical.value.source})`);
-const assert = require('../src/util/assert.js');
+const Liquid = require('..')
+const lexical = Liquid.lexical
+const withRE = new RegExp(`with\\s+(${lexical.value.source})`)
+const assert = require('../src/util/assert.js')
 
-module.exports = function(liquid) {
+module.exports = function (liquid) {
+  liquid.registerTag('include', {
+    parse: function (token) {
+      var match = lexical.value.exec(token.args)
+      assert(match, `illegal token ${token.raw}`)
+      this.value = match[0]
 
-    liquid.registerTag('include', {
-        parse: function(token){
-            var match = lexical.value.exec(token.args);
-            assert(match, `illegal token ${token.raw}`);
-            this.value = match[0];
+      match = withRE.exec(token.args)
+      if (match) {
+        this.with = match[1]
+      }
+    },
+    render: function (scope, hash) {
+      var filepath = Liquid.evalValue(this.value, scope)
 
-            match = withRE.exec(token.args);
-            if(match){
-                this.with = match[1];
-            }
-        },
-        render: function(scope, hash) {
-            var filepath = Liquid.evalValue(this.value, scope);
+      var register = scope.get('liquid')
+      var originBlocks = register.blocks
+      register.blocks = {}
 
-            var register = scope.get('liquid');
-            var originBlocks = register.blocks;
-            register.blocks = {};
-
-            if(this.with){
-                hash[filepath] = Liquid.evalValue(this.with, scope);
-            }
-            return liquid.getTemplate(filepath, register.root)
-                .then((templates) => {
-                    scope.push(hash);
-                    return liquid.renderer.renderTemplates(templates, scope);
-                })
-                .then((html) => {
-                    scope.pop();
-                    register.blocks = originBlocks;
-                    return html;
-                });
-        }
-    });
-
-};
+      if (this.with) {
+        hash[filepath] = Liquid.evalValue(this.with, scope)
+      }
+      return liquid.getTemplate(filepath, register.root)
+        .then((templates) => {
+          scope.push(hash)
+          return liquid.renderer.renderTemplates(templates, scope)
+        })
+        .then((html) => {
+          scope.pop()
+          register.blocks = originBlocks
+          return html
+        })
+    }
+  })
+}

tags/layout.js

@@ -1,66 +1,68 @@
-const Liquid = require('..');
-const Promise = require('any-promise');
-const lexical = Liquid.lexical;
-const assert = require('../src/util/assert.js');
+const Liquid = require('..')
+const Promise = require('any-promise')
+const lexical = Liquid.lexical
+const assert = require('../src/util/assert.js')
 
-module.exports = function(liquid) {
+module.exports = function (liquid) {
+  liquid.registerTag('layout', {
+    parse: function (token, remainTokens) {
+      var match = lexical.value.exec(token.args)
+      assert(match, `illegal token ${token.raw}`)
 
-    liquid.registerTag('layout', {
-        parse: function(token, remainTokens){
-            var match = lexical.value.exec(token.args);
-            assert(match, `illegal token ${token.raw}`);
+      this.layout = match[0]
+      this.tpls = liquid.parser.parse(remainTokens)
+    },
+    render: function (scope, hash) {
+      var layout = Liquid.evalValue(this.layout, scope)
+      var register = scope.get('liquid')
 
-            this.layout = match[0];
-            this.tpls = liquid.parser.parse(remainTokens);
-        },
-        render: function(scope, hash) {
-            var layout = Liquid.evalValue(this.layout, scope);
-            var register = scope.get('liquid');
+      // render the remaining tokens immediately
+      return liquid.renderer.renderTemplates(this.tpls, scope)
+        // now register.blocks contains rendered blocks
+        .then(() => liquid.getTemplate(layout, register.root))
+        .then(templates => {
+          // push the hash
+          scope.push(hash)
+          // render the parent
+          return liquid.renderer.renderTemplates(templates, scope)
+        })
+        // pop the hash
+        .then(partial => {
+          scope.pop()
+          return partial
+        })
+    }
+  })
 
-            // render the remaining tokens immediately
-            return liquid.renderer.renderTemplates(this.tpls, scope)
-                // now register.blocks contains rendered blocks
-                .then(() => liquid.getTemplate(layout, register.root))
-                // push the hash
-                .then(templates => (scope.push(hash), templates))
-                // render the parent
-                .then(templates => liquid.renderer.renderTemplates(templates, scope))
-                // pop the hash
-                .then(partial => (scope.pop(), partial));
-        }
-    });
+  liquid.registerTag('block', {
+    parse: function (token, remainTokens) {
+      var match = /\w+/.exec(token.args)
+      this.block = match ? match[0] : 'anonymous'
 
-    liquid.registerTag('block', {
-        parse: function(token, remainTokens){
-            var match = /\w+/.exec(token.args);
-            this.block = match ? match[0] : 'anonymous';
-
-            this.tpls = [];
-            var stream = liquid.parser.parseStream(remainTokens)
-                .on('tag:endblock', () => stream.stop())
-                .on('template', tpl => this.tpls.push(tpl))
-                .on('end', () => {
-                    throw new Error(`tag ${token.raw} not closed`);
-                });
-            stream.start();
-        },
-        render: function(scope){
-            var register = scope.get('liquid');
-            var html = register.blocks[this.block];
-            // if not defined yet
-            if (html === undefined) {
-                return liquid.renderer.renderTemplates(this.tpls, scope)
-                    .then((partial) => {
-                        register.blocks[this.block] = partial;
-                        return partial;
-                    });
-            }
-            // if already defined by desendents
-            else {
-                register.blocks[this.block] = html;
-                return Promise.resolve(html);
-            }
-        }
-    });
-
-};
+      this.tpls = []
+      var stream = liquid.parser.parseStream(remainTokens)
+        .on('tag:endblock', () => stream.stop())
+        .on('template', tpl => this.tpls.push(tpl))
+        .on('end', () => {
+          throw new Error(`tag ${token.raw} not closed`)
+        })
+      stream.start()
+    },
+    render: function (scope) {
+      var register = scope.get('liquid')
+      var html = register.blocks[this.block]
+      // if not defined yet
+      if (html === undefined) {
+        return liquid.renderer.renderTemplates(this.tpls, scope)
+          .then((partial) => {
+            register.blocks[this.block] = partial
+            return partial
+          })
+      } else {
+        // if already defined by desendents
+        register.blocks[this.block] = html
+        return Promise.resolve(html)
+      }
+    }
+  })
+}

tags/raw.js

@@ -1,26 +1,24 @@
-const Promise = require('any-promise');
+const Promise = require('any-promise')
 
-module.exports = function(liquid) {
+module.exports = function (liquid) {
+  liquid.registerTag('raw', {
+    parse: function (tagToken, remainTokens) {
+      this.tokens = []
 
-    liquid.registerTag('raw', {
-        parse: function(tagToken, remainTokens) {
-            this.tokens = [];
-
-            var stream = liquid.parser.parseStream(remainTokens);
-            stream
+      var stream = liquid.parser.parseStream(remainTokens)
+      stream
                 .on('token', token => {
-                    if(token.name === 'endraw') stream.stop();
-                    else this.tokens.push(token);
+                  if (token.name === 'endraw') stream.stop()
+                  else this.tokens.push(token)
                 })
                 .on('end', x => {
-                    throw new Error(`tag ${tagToken.raw} not closed`);
-                });
-            stream.start();
-        },
-        render: function(scope, hash) {
-            var tokens = this.tokens.map(token => token.raw).join('');
-            return Promise.resolve(tokens);
-        }
-    });
-
-};
+                  throw new Error(`tag ${tagToken.raw} not closed`)
+                })
+      stream.start()
+    },
+    render: function (scope, hash) {
+      var tokens = this.tokens.map(token => token.raw).join('')
+      return Promise.resolve(tokens)
+    }
+  })
+}

tags/tablerow.js

@@ -1,95 +1,84 @@
-const Liquid = require('..');
-const Promise = require('any-promise');
-const lexical = Liquid.lexical;
-const assert = require('../src/util/assert.js');
+const Liquid = require('..')
+const mapSeries = require('../src/util/promise.js').mapSeries
+const lexical = Liquid.lexical
+const assert = require('../src/util/assert.js')
 const re = new RegExp(`^(${lexical.identifier.source})\\s+in\\s+` +
-    `(${lexical.value.source})` +
-    `(?:\\s+${lexical.hash.source})*$`);
+  `(${lexical.value.source})` +
+  `(?:\\s+${lexical.hash.source})*$`)
 
-module.exports = function(liquid) {
-    liquid.registerTag('tablerow', {
+module.exports = function (liquid) {
+  liquid.registerTag('tablerow', {
 
-        parse: function(tagToken, remainTokens) {
-            var match = re.exec(tagToken.args);
-            assert(match, `illegal tag: ${tagToken.raw}`);
-            this.variable = match[1];
-            this.collection = match[2];
+    parse: function (tagToken, remainTokens) {
+      var match = re.exec(tagToken.args)
+      assert(match, `illegal tag: ${tagToken.raw}`)
 
-            this.templates = [];
+      this.variable = match[1]
+      this.collection = match[2]
+      this.templates = []
 
-            var p, stream = liquid.parser.parseStream(remainTokens)
-                .on('start', x => p = this.templates)
-                .on('tag:endtablerow', token => stream.stop())
-                .on('template', tpl => p.push(tpl))
-                .on('end', x => {
-                    throw new Error(`tag ${tagToken.raw} not closed`);
-                });
+      var p
+      var stream = liquid.parser.parseStream(remainTokens)
+        .on('start', () => (p = this.templates))
+        .on('tag:endtablerow', token => stream.stop())
+        .on('template', tpl => p.push(tpl))
+        .on('end', () => {
+          throw new Error(`tag ${tagToken.raw} not closed`)
+        })
 
-            stream.start();
-        },
+      stream.start()
+    },
 
-        render: function(scope, hash) {
-            var collection = Liquid.evalExp(this.collection, scope) || [];
+    render: function (scope, hash) {
+      var collection = Liquid.evalExp(this.collection, scope) || []
 
-            var html = '<table>';
-            var offset = hash.offset || 0;
-            var limit = (hash.limit === undefined) ? collection.length : hash.limit;
+      var html = '<table>'
+      var offset = hash.offset || 0
+      var limit = (hash.limit === undefined) ? collection.length : hash.limit
 
-            var cols = hash.cols, row, col;
-            if (!cols) throw new Error(`illegal cols: ${cols}`);
+      var cols = hash.cols
+      var row
+      var col
+      if (!cols) throw new Error(`illegal cols: ${cols}`)
 
-            // build array of arguments to pass to sequential promises...
-            collection = collection.slice(offset, offset + limit);
-            var contexts = [];
-            collection.some((item, i) => {
-                var ctx = {};
-                ctx[this.variable] = item;
-                // We are just putting together an array of the arguments we will be passing to our sequential promises
-                contexts.push(ctx);
-            });
+      // build array of arguments to pass to sequential promises...
+      collection = collection.slice(offset, offset + limit)
+      var contexts = []
+      collection.some((item, i) => {
+        var ctx = {}
+        ctx[this.variable] = item
+        contexts.push(ctx)
+      })
 
-            // This executes an array of promises sequentially for every argument in the contexts array - http://webcache.googleusercontent.com/search?q=cache:rNbMUn9TPtkJ:joost.vunderink.net/blog/2014/12/15/processing-an-array-of-promises-sequentially-in-node-js/+&cd=5&hl=en&ct=clnk&gl=us
-            // It's fundamentally equivalent to the following...
-            //  emptyPromise.then(renderTemplates(args0).then(renderTemplates(args1).then(renderTemplates(args2)...
-            var lastPromise = contexts.reduce((promise, context, currentIndex) => {
-                return promise.then((partial) => {
-                    row = Math.floor(currentIndex / cols) + 1;
-                    col = (currentIndex % cols) + 1;
-                    if(col === 1) {
-                        if(row !== 1){
-                            html += '</tr>';
-                        }
-                        html += `<tr class="row${row}">`;
-                    }
+      return mapSeries(contexts,
+        (context, idx) => {
+          row = Math.floor(idx / cols) + 1
+          col = (idx % cols) + 1
+          if (col === 1) {
+            if (row !== 1) {
+              html += '</tr>'
+            }
+            html += `<tr class="row${row}">`
+          }
 
-                    //ctx[this.variable] = context;
-
-                    return html += `<td class="col${col}">`;
-                })
-                .then((partial) => {
-                    scope.push(context);
-                    return liquid.renderer.renderTemplates(this.templates, scope)
-                })
-                .then((partial) => {
-                    scope.pop(context);
-                    html += partial;
-                    return html += '</td>';
-                });
-            }, Promise.resolve(''));    // start the reduce chain with a resolved Promise. After first run, the "promise" argument
-                                        //  in our reduce callback will be the returned promise from our "then" above.  In this
-                                        //  case, the promise returned from liquid.renderer.renderTemplates.
-
-            return lastPromise
-                .then(() => {
-                    if(row > 0) {
-                        html += '</tr>';
-                    }
-                    html += '</table>';
-                    return html;
-                })
-                .catch((error) => {
-                    throw error;
-                });
-        }
-    });
-};
+          html += `<td class="col${col}">`
+          scope.push(context)
+          return liquid.renderer
+            .renderTemplates(this.templates, scope)
+            .then((partial) => {
+              scope.pop(context)
+              html += partial
+              html += '</td>'
+              return html
+            })
+        })
+        .then(() => {
+          if (row > 0) {
+            html += '</tr>'
+          }
+          html += '</table>'
+          return html
+        })
+    }
+  })
+}

test/.eslintrc.json

@@ -0,0 +1,11 @@
+{
+  "rules": {
+    "no-unused-expressions": "off"
+  },
+  "env": {
+    "mocha": true
+  },
+  "plugins": [
+    "mocha"
+  ]
+}

test/express.js

@@ -1,94 +1,94 @@
-const chai = require("chai");
-const expect = chai.expect;
-const mock = require('mock-fs');
-const request = require('supertest');
-const express = require('express');
-const Liquid = require('..');
+const chai = require('chai')
+const expect = chai.expect
+const mock = require('mock-fs')
+const request = require('supertest')
+const express = require('express')
+const Liquid = require('..')
 
-describe('engine#express()', function() {
-    var app, engine;
+describe('engine#express()', function () {
+  var app, engine
 
-    beforeEach(function() {
-        app = express();
-        engine = Liquid({
-            root: '/root',
-            extname: '.html'
-        });
+  beforeEach(function () {
+    app = express()
+    engine = Liquid({
+      root: '/root',
+      extname: '.html'
+    })
 
-        app.set('view engine', 'html');
-        app.engine('html', engine.express());
+    app.set('view engine', 'html')
+    app.engine('html', engine.express())
 
-        app.get('/name', (req, res) => res.render('name', {
-            name: 'harttle'
-        }));
-        app.get('/include/:file', (req, res) => res.render('include', {
-            file: req.params.file
-        }));
-    });
-    after(function() {
-        mock.restore();
-    });
-    it('should render express views', function(done) {
-        mock({ '/views/name.html': 'My name is {{name}}.' });
-        app.set('views', ['/views']);
-        request(app).get('/name')
-            .expect('My name is harttle.')
-            .expect(200, done);
-    });
-    it('should pass error when file not found', function(done) {
-        var view = {
-            root: []
-        };
-        var file = '/not-exist.html';
-        var ctx = {};
-        engine.express().call(view, file, ctx, function(err) {
-            try {
-                expect(err.code).to.equal('ENOENT');
-                expect(err.message).to.match(/Failed to lookup/);
-                done();
-            } catch (e) {
-                done(e);
-            }
-        });
-    });
-    it('should respect root option when lookup', function(done) {
-        mock({
-            '/root/foo.html': 'foo',
-            '/views/include.html': '{% include file %}'
-        });
-        app.set('views', ['/views']);
-        request(app).get('/include/foo')
-            .expect('foo')
-            .expect(200, done);
-    });
-    it('should respect express views (Array) when lookup', function(done) {
-        mock({
-            '/views/include.html': '{% include file %}',
-            '/partials/bar.html': 'bar'
-        });
-        app.set('views', ['/views', '/partials']);
-        request(app).get('/include/bar')
-            .expect('bar')
-            .expect(200, done);
-    });
-    it('should respect express views (String) when lookup', function(done) {
-        mock({
-            '/views/include.html': '{% include file %}',
-            '/views/bar.html': 'bar'
-        });
-        app.set('views', '/views');
-        request(app).get('/include/bar')
-            .expect('bar')
-            .expect(200, done);
-    });
-    it('should respect express views (Undefined) when lookup', function(done) {
-        var files = {};
-        files[process.cwd() + '/views/include.html'] = '{% include file %}';
-        files[process.cwd() + '/views/bar.html'] = 'bar';
-        mock(files);
+    app.get('/name', (req, res) => res.render('name', {
+      name: 'harttle'
+    }))
+    app.get('/include/:file', (req, res) => res.render('include', {
+      file: req.params.file
+    }))
+  })
+  after(function () {
+    mock.restore()
+  })
+  it('should render express views', function (done) {
+    mock({ '/views/name.html': 'My name is {{name}}.' })
+    app.set('views', ['/views'])
+    request(app).get('/name')
+      .expect('My name is harttle.')
+      .expect(200, done)
+  })
+  it('should pass error when file not found', function (done) {
+    var view = {
+      root: []
+    }
+    var file = '/not-exist.html'
+    var ctx = {}
+    engine.express().call(view, file, ctx, function (err) {
+      try {
+        expect(err.code).to.equal('ENOENT')
+        expect(err.message).to.match(/Failed to lookup/)
+        done()
+      } catch (e) {
+        done(e)
+      }
+    })
+  })
+  it('should respect root option when lookup', function (done) {
+    mock({
+      '/root/foo.html': 'foo',
+      '/views/include.html': '{% include file %}'
+    })
+    app.set('views', ['/views'])
+    request(app).get('/include/foo')
+      .expect('foo')
+      .expect(200, done)
+  })
+  it('should respect express views (Array) when lookup', function (done) {
+    mock({
+      '/views/include.html': '{% include file %}',
+      '/partials/bar.html': 'bar'
+    })
+    app.set('views', ['/views', '/partials'])
+    request(app).get('/include/bar')
+      .expect('bar')
+      .expect(200, done)
+  })
+  it('should respect express views (String) when lookup', function (done) {
+    mock({
+      '/views/include.html': '{% include file %}',
+      '/views/bar.html': 'bar'
+    })
+    app.set('views', '/views')
+    request(app).get('/include/bar')
+      .expect('bar')
+      .expect(200, done)
+  })
+  it('should respect express views (Undefined) when lookup', function (done) {
+    var files = {}
+    files[process.cwd() + '/views/include.html'] = '{% include file %}'
+    files[process.cwd() + '/views/bar.html'] = 'bar'
+    mock(files)
 
-        request(app).get('/include/bar')
-            .expect('bar')
-            .expect(200, done);
-    });
-});
+    request(app).get('/include/bar')
+      .expect('bar')
+      .expect(200, done)
+  })
+})

test/filter.js

@@ -1,57 +1,57 @@
-const chai = require("chai");
-const sinon = require("sinon");
-const sinonChai = require("sinon-chai");
-const expect = chai.expect;
+const chai = require('chai')
+const sinon = require('sinon')
+const sinonChai = require('sinon-chai')
+const expect = chai.expect
 
-chai.use(sinonChai);
+chai.use(sinonChai)
 
-var filter = require('../src/filter.js')();
-var Scope = require('../src/scope.js');
+var filter = require('../src/filter.js')()
+var Scope = require('../src/scope.js')
 
-describe('filter', function() {
-    var scope;
-    beforeEach(function() {
-        filter.clear();
-        scope = Scope.factory();
-    });
-    it('should return default filter when not registered', function() {
-        var result = filter.construct('foo');
-        expect(result.name).to.equal('foo');
-    });
+describe('filter', function () {
+  var scope
+  beforeEach(function () {
+    filter.clear()
+    scope = Scope.factory()
+  })
+  it('should return default filter when not registered', function () {
+    var result = filter.construct('foo')
+    expect(result.name).to.equal('foo')
+  })
 
-    it('should throw when filter name illegal', function() {
-        expect(function() {
-            filter.construct('/');
-        }).to.throw(/illegal filter/);
-    });
+  it('should throw when filter name illegal', function () {
+    expect(function () {
+      filter.construct('/')
+    }).to.throw(/illegal filter/)
+  })
 
-    it('should parse argument syntax', function() {
-        filter.register('foo', x => x);
-        var f = filter.construct('foo: a, "b"');
+  it('should parse argument syntax', function () {
+    filter.register('foo', x => x)
+    var f = filter.construct('foo: a, "b"')
 
-        expect(f.name).to.equal('foo');
-        expect(f.args).to.deep.equal(['a', '"b"']);
-    });
+    expect(f.name).to.equal('foo')
+    expect(f.args).to.deep.equal(['a', '"b"'])
+  })
 
-    it('should register a simple filter', function() {
-        filter.register('upcase', x => x.toUpperCase());
-        expect(filter.construct('upcase').render('foo', scope)).to.equal('FOO');
-    });
+  it('should register a simple filter', function () {
+    filter.register('upcase', x => x.toUpperCase())
+    expect(filter.construct('upcase').render('foo', scope)).to.equal('FOO')
+  })
 
-    it('should register a argumented filter', function() {
-        filter.register('add', (a, b) => a + b);
-        expect(filter.construct('add: 2').render(3, scope)).to.equal(5);
-    });
+  it('should register a argumented filter', function () {
+    filter.register('add', (a, b) => a + b)
+    expect(filter.construct('add: 2').render(3, scope)).to.equal(5)
+  })
 
-    it('should register a multi-argumented filter', function() {
-        filter.register('add', (a, b, c) => a + b + c);
-        expect(filter.construct('add: 2, "c"').render(3, scope)).to.equal("5c");
-    });
+  it('should register a multi-argumented filter', function () {
+    filter.register('add', (a, b, c) => a + b + c)
+    expect(filter.construct('add: 2, "c"').render(3, scope)).to.equal('5c')
+  })
 
-    it('should call filter with corrct arguments', function() {
-        var spy = sinon.spy();
-        filter.register('foo', spy);
-        filter.construct('foo: 33').render('foo', scope);
-        expect(spy).to.have.been.calledWith('foo', 33);
-    });
-});
+  it('should call filter with corrct arguments', function () {
+    var spy = sinon.spy()
+    filter.register('foo', spy)
+    filter.construct('foo: 33').render('foo', scope)
+    expect(spy).to.have.been.calledWith('foo', 33)
+  })
+})

test/filters.js

@@ -1,318 +1,355 @@
-const chai = require("chai");
-const chaiAsPromised = require("chai-as-promised");
-var liquid = require('..')(),
-    ctx;
-chai.use(chaiAsPromised);
+const chai = require('chai')
+const chaiAsPromised = require('chai-as-promised')
+const expect = chai.expect
+var liquid = require('..')()
+var ctx
+chai.use(chaiAsPromised)
 
-function test(src, dst) {
-    ctx = {
-        date: new Date(),
-        foo: 'bar',
-        arr: [-2, 'a'],
-        obj: {
-            foo: 'bar'
-        },
-        func: function() {},
-        posts: [{
-            category: 'foo'
-        }, {
-            category: 'bar'
-        }]
-    };
-    return liquid.parseAndRender(src, ctx).should.eventually.equal(dst);
+function test (src, dst) {
+  ctx = {
+    date: new Date(),
+    foo: 'bar',
+    arr: [-2, 'a'],
+    obj: {
+      foo: 'bar'
+    },
+    func: function () {},
+    posts: [{
+      category: 'foo'
+    }, {
+      category: 'bar'
+    }]
+  }
+  return expect(liquid.parseAndRender(src, ctx)).to.eventually.equal(dst)
 }
 
-describe('filters', function() {
-    describe('abs', function() {
-        it('should return 3 for -3', () => test('{{ -3 | abs }}', '3'));
-        it('should return 2 for arr[0]', () => test('{{ arr[0] | abs }}', '2'));
-    });
+describe('filters', function () {
+  describe('abs', function () {
+    it('should return 3 for -3', () => test('{{ -3 | abs }}', '3'))
+    it('should return 2 for arr[0]', () => test('{{ arr[0] | abs }}', '2'))
+    it('should return convert string', () => test('{{ "-3" | abs }}', '3'))
+  })
 
-    describe('append', function() {
-        it('should return "-3abc" for -3, "abc"',
-            () => test('{{ -3 | append: "abc" }}', '-3abc'));
-        it('should return "abar" for "a",foo', () => test('{{ "a" | append: foo }}', 'abar'));
-    });
+  describe('append', function () {
+    it('should return "-3abc" for -3, "abc"',
+      () => test('{{ -3 | append: "abc" }}', '-3abc'))
+    it('should return "abar" for "a",foo', () => test('{{ "a" | append: foo }}', 'abar'))
+  })
 
-    it('should support capitalize', () => test('{{ "i am good" | capitalize }}', 'I am good'));
+  it('should support capitalize', () => test('{{ "i am good" | capitalize }}', 'I am good'))
 
-    describe('ceil', function() {
-        it('should return "2" for 1.2', () => test('{{ 1.2 | ceil }}', '2'));
-        it('should return "2" for 2.0', () => test('{{ 2.0 | ceil }}', '2'));
-        it('should return "4" for 3.5', () => test('{{ "3.5" | ceil }}', '4'));
-        it('should return "184" for 183.357', () => test('{{ 183.357 | ceil }}', '184'));
-    });
+  describe('ceil', function () {
+    it('should return "2" for 1.2', () => test('{{ 1.2 | ceil }}', '2'))
+    it('should return "2" for 2.0', () => test('{{ 2.0 | ceil }}', '2'))
+    it('should return "4" for 3.5', () => test('{{ "3.5" | ceil }}', '4'))
+    it('should return "184" for 183.357', () => test('{{ 183.357 | ceil }}', '184'))
+  })
 
-    describe('date', function() {
-        it('should support date: %a %b %d %Y', function() {
-            var str = ctx.date.toDateString();
-            return test('{{ date | date:"%a %b %d %Y"}}', str);
-        });
-        it('should create a new Date when given "now"', function() {
-            return test('{{ "now" | date: "%Y"}}', (new Date).getFullYear().toString());
-        });
-    });
+  describe('date', function () {
+    it('should support date: %a %b %d %Y', function () {
+      var str = ctx.date.toDateString()
+      return test('{{ date | date:"%a %b %d %Y"}}', str)
+    })
+    it('should create a new Date when given "now"', function () {
+      return test('{{ "now" | date: "%Y"}}', (new Date()).getFullYear().toString())
+    })
+    it('should render as empty string when invalid', function () {
+      return test('{{ "" | date: "%Y"}}', '')
+    })
+  })
 
-    describe('default', function() {
-        it('should use default when falsy', () => test('{{false |default: "a"}}', 'a'));
-        it('should not use default when truthy', () => test('{{true |default: "a"}}', 'true'));
-    });
+  describe('default', function () {
+    it('should use default when falsy', () => test('{{false |default: "a"}}', 'a'))
+    it('should not use default when truthy', () => test('{{true |default: "a"}}', 'true'))
+  })
 
-    describe('divided_by', function() {
-        it('should return 2 for 4,2', () => test('{{4 | divided_by: 2}}', '2'));
-        it('should return 4 for 16,4', () => test('{{16 | divided_by: 4}}', '4'));
-        it('should return 1 for 5,3', () => test('{{5 | divided_by: 3}}', '1'));
-    });
+  describe('divided_by', function () {
+    it('should return 2 for 4,2', () => test('{{4 | divided_by: 2}}', '2'))
+    it('should return 4 for 16,4', () => test('{{16 | divided_by: 4}}', '4'))
+    it('should return 1 for 5,3', () => test('{{5 | divided_by: 3}}', '1'))
+    it('should convert string to number', () => test('{{"5" | divided_by: "3"}}', '1'))
+  })
 
-    describe('downcase', function() {
-        it('should return "parker moore" for "Parker Moore"',
-            () => test('{{ "Parker Moore" | downcase }}', 'parker moore'));
-        it('should return "apple" for "apple"',
-            () => test('{{ "apple" | downcase }}', 'apple'));
-    });
+  describe('downcase', function () {
+    it('should return "parker moore" for "Parker Moore"',
+      () => test('{{ "Parker Moore" | downcase }}', 'parker moore'))
+    it('should return "apple" for "apple"',
+      () => test('{{ "apple" | downcase }}', 'apple'))
+  })
 
-    describe('escape', function() {
-        it('should escape \' and &', function() {
-            return test('{{ "Have you read \'James & the Giant Peach\'?" | escape }}',
-                'Have you read 'James & the Giant Peach'?');
-        });
-        it('should escape normal string', function() {
-            return test('{{ "Tetsuro Takara" | escape }}', 'Tetsuro Takara');
-        });
-        it('should escape function', function() {
-            return test('{{ func | escape }}', 'function () {}');
-        });
-    });
+  describe('escape', function () {
+    it('should escape \' and &', function () {
+      return test('{{ "Have you read \'James & the Giant Peach\'?" | escape }}',
+        'Have you read 'James & the Giant Peach'?')
+    })
+    it('should escape normal string', function () {
+      return test('{{ "Tetsuro Takara" | escape }}', 'Tetsuro Takara')
+    })
+    it('should escape function', function () {
+      return test('{{ func | escape }}', 'function () {}')
+    })
+  })
 
-    describe('escape_once', function() {
-        it('should do escape', () =>
-            test('{{ "1 < 2 & 3" | escape_once }}', '1 &lt; 2 &amp; 3'));
-        it('should not escape twice',
-            () => test('{{ "1 &lt; 2 &amp; 3" | escape_once }}', '1 &lt; 2 &amp; 3'));
-    });
+  describe('escape_once', function () {
+    it('should do escape', () =>
+      test('{{ "1 < 2 & 3" | escape_once }}', '1 &lt; 2 &amp; 3'))
+    it('should not escape twice',
+      () => test('{{ "1 &lt; 2 &amp; 3" | escape_once }}', '1 &lt; 2 &amp; 3'))
+  })
 
-    it('should support split/first', function() {
-        var src = '{% assign my_array = "apples, oranges, peaches, plums" | split: ", " %}' +
-            '{{ my_array | first }}';
-        return test(src, 'apples');
-    });
+  it('should support split/first', function () {
+    var src = '{% assign my_array = "apples, oranges, peaches, plums" | split: ", " %}' +
+            '{{ my_array | first }}'
+    return test(src, 'apples')
+  })
 
-    describe('floor', function() {
-        it('should return "1" for 1.2', () => test('{{ 1.2 | floor }}', '1'));
-        it('should return "2" for 2.0', () => test('{{ 2.0 | floor }}', '2'));
-        it('should return "183" for 183.357', () => test('{{ 183.357 | floor }}', '183'));
-        it('should return "3" for 3.5', () => test('{{ "3.5" | floor }}', '3'));
-    });
+  describe('floor', function () {
+    it('should return "1" for 1.2', () => test('{{ 1.2 | floor }}', '1'))
+    it('should return "2" for 2.0', () => test('{{ 2.0 | floor }}', '2'))
+    it('should return "183" for 183.357', () => test('{{ 183.357 | floor }}', '183'))
+    it('should return "3" for 3.5', () => test('{{ "3.5" | floor }}', '3'))
+  })
 
-    it('should support join', function() {
-        var src = '{% assign beatles = "John, Paul, George, Ringo" | split: ", " %}' +
-            '{{ beatles | join: " and " }}';
-        return test(src, 'John and Paul and George and Ringo');
-    });
+  it('should support join', function () {
+    var src = '{% assign beatles = "John, Paul, George, Ringo" | split: ", " %}' +
+            '{{ beatles | join: " and " }}'
+    return test(src, 'John and Paul and George and Ringo')
+  })
 
-    it('should support split/last', function() {
-        var src = '{% assign my_array = "zebra, octopus, giraffe, tiger" | split: ", " %}' +
-            '{{ my_array|last }}';
-        return test(src, 'tiger');
-    });
+  it('should support split/last', function () {
+    var src = '{% assign my_array = "zebra, octopus, giraffe, tiger" | split: ", " %}' +
+            '{{ my_array|last }}'
+    return test(src, 'tiger')
+  })
 
-    it('should support lstrip', function() {
-        var src = '{{ "          So much room for activities!          " | lstrip }}';
-        return test(src, 'So much room for activities!          ');
-    });
+  it('should support lstrip', function () {
+    var src = '{{ "          So much room for activities!          " | lstrip }}'
+    return test(src, 'So much room for activities!          ')
+  })
 
-    it('should support map', function() {
-        return test('{{posts | map: "category"}}', '["foo","bar"]');
-    });
+  it('should support map', function () {
+    return test('{{posts | map: "category"}}', '["foo","bar"]')
+  })
 
-    describe('minus', function() {
-        it('should return "2" for 4,2', () => test('{{ 4 | minus: 2 }}', '2'));
-        it('should return "12" for 16,4', () => test('{{ 16 | minus: 4 }}', '12'));
-        it('should return "171.357" for 183.357,12',
-            () => test('{{ 183.357 | minus: 12 }}', '171.357'));
-    });
+  describe('minus', function () {
+    it('should return "2" for 4,2', () => test('{{ 4 | minus: 2 }}', '2'))
+    it('should return "12" for 16,4', () => test('{{ 16 | minus: 4 }}', '12'))
+    it('should return "171.357" for 183.357,12',
+      () => test('{{ 183.357 | minus: 12 }}', '171.357'))
+    it('should convert first arg as number', () => test('{{ "4" | minus: 1 }}', '3'))
+    it('should convert both args as number', () => test('{{ "4" | minus: "1" }}', '3'))
+  })
 
-    describe('modulo', function() {
-        it('should return "1" for 3,2', () => test('{{ 3 | modulo: 2 }}', '1'));
-        it('should return "3" for 24,7', () => test('{{ 24 | modulo: 7 }}', '3'));
-        it('should return "3.357" for 183.357,12',
-            () => test('{{ 183.357 | modulo: 12 }}', '3.357'));
-    });
+  describe('modulo', function () {
+    it('should return "1" for 3,2', () => test('{{ 3 | modulo: 2 }}', '1'))
+    it('should return "3" for 24,7', () => test('{{ 24 | modulo: 7 }}', '3'))
+    it('should return "3.357" for 183.357,12',
+      () => test('{{ 183.357 | modulo: 12 }}', '3.357'))
+    it('should convert string', () => test('{{ "24" | modulo: "7" }}', '3'))
+  })
 
-    it('should support string_with_newlines', function() {
-        var src = '{% capture string_with_newlines %}\n' +
+  it('should support string_with_newlines', function () {
+    var src = '{% capture string_with_newlines %}\n' +
             'Hello\n' +
             'there\n' +
             '{% endcapture %}' +
-            '{{ string_with_newlines | newline_to_br }}';
-        var dst = '<br />' +
+            '{{ string_with_newlines | newline_to_br }}'
+    var dst = '<br />' +
             'Hello<br />' +
-            'there<br />';
-        return test(src, dst);
-    });
+            'there<br />'
+    return test(src, dst)
+  })
 
-    describe('plus', function() {
-        it('should return "6" for 4,2', () => test('{{ 4 | plus: 2 }}', '6'));
-        it('should return "20" for 16,4', () => test('{{ 16 | plus: 4 }}', '20'));
-        it('should return "195.357" for 183.357,12',
-            () => test('{{ 183.357 | plus: 12 }}', '195.357'));
-    });
+  describe('plus', function () {
+    it('should return "6" for 4,2', () => test('{{ 4 | plus: 2 }}', '6'))
+    it('should return "20" for 16,4', () => test('{{ 16 | plus: 4 }}', '20'))
+    it('should return "195.357" for 183.357,12',
+      () => test('{{ 183.357 | plus: 12 }}', '195.357'))
+    it('should convert first arg as number', () => test('{{ "4" | plus: 2 }}', '6'))
+    it('should convert both args as number', () => test('{{ "4" | plus: "2" }}', '6'))
+  })
 
-    it('should support prepend', function() {
-        return test('{% assign url = "liquidmarkup.com" %}' +
+  it('should support prepend', function () {
+    return test('{% assign url = "liquidmarkup.com" %}' +
             '{{ "/index.html" | prepend: url }}',
-            'liquidmarkup.com/index.html');
-    });
+    'liquidmarkup.com/index.html')
+  })
 
-    it('should support remove', function() {
-        return test('{{ "I strained to see the train through the rain" | remove: "rain" }}',
-            'I sted to see the t through the ');
-    });
+  it('should support remove', function () {
+    return test('{{ "I strained to see the train through the rain" | remove: "rain" }}',
+      'I sted to see the t through the ')
+  })
 
-    it('should support remove_first', function() {
-        return test('{{ "I strained to see the train through the rain" | remove_first: "rain" }}',
-            'I sted to see the train through the rain');
-    });
+  it('should support remove_first', function () {
+    return test('{{ "I strained to see the train through the rain" | remove_first: "rain" }}',
+      'I sted to see the train through the rain')
+  })
 
-    it('should support replace', function() {
-        return test('{{ "Take my protein pills and put my helmet on" | replace: "my", "your" }}',
-            'Take your protein pills and put your helmet on');
-    });
+  it('should support replace', function () {
+    return test('{{ "Take my protein pills and put my helmet on" | replace: "my", "your" }}',
+      'Take your protein pills and put your helmet on')
+  })
 
-    it('should support replace_first', function() {
-        return test('{% assign my_string = "Take my protein pills and put my helmet on" %}\n' +
+  it('should support replace_first', function () {
+    return test('{% assign my_string = "Take my protein pills and put my helmet on" %}\n' +
             '{{ my_string | replace_first: "my", "your" }}',
-            '\nTake your protein pills and put my helmet on');
-    });
+    '\nTake your protein pills and put my helmet on')
+  })
 
-    it('should support reverse', function() {
-        return test('{{ "Ground control to Major Tom." | split: "" | reverse | join: "" }}',
-            '.moT rojaM ot lortnoc dnuorG');
-    });
+  it('should support reverse', function () {
+    return test('{{ "Ground control to Major Tom." | split: "" | reverse | join: "" }}',
+      '.moT rojaM ot lortnoc dnuorG')
+  })
 
-    describe('round', function() {
-        it('should return "1" for 1.2', () => test('{{1.2|round}}', '1'));
-        it('should return "3" for 2.7', () => test('{{2.7|round}}', '3'));
-        it('should return "183.36" for 183.357,2',
-            () => test('{{183.357|round: 2}}', '183.36'));
-    });
+  describe('round', function () {
+    it('should return "1" for 1.2', () => test('{{1.2|round}}', '1'))
+    it('should return "3" for 2.7', () => test('{{2.7|round}}', '3'))
+    it('should return "183.36" for 183.357,2',
+      () => test('{{183.357|round: 2}}', '183.36'))
+    it('should convert string to number', () => test('{{"2.7"|round}}', '3'))
+  })
 
-    it('should support rstrip', function() {
-        return test('{{ "          So much room for activities!          " | rstrip }}',
-            '          So much room for activities!');
-    });
+  it('should support rstrip', function () {
+    return test('{{ "          So much room for activities!          " | rstrip }}',
+      '          So much room for activities!')
+  })
 
-    describe('size', function() {
-        it('should return string length',
-            () => test('{{ "Ground control to Major Tom." | size }}', '28'));
-        it('should return array size', function() {
-            return test('{% assign my_array = "apples, oranges, peaches, plums"' +
+  describe('size', function () {
+    it('should return string length',
+      () => test('{{ "Ground control to Major Tom." | size }}', '28'))
+    it('should return array size', function () {
+      return test('{% assign my_array = "apples, oranges, peaches, plums"' +
                 ' | split: ", " %}{{ my_array | size }}',
-                '4');
-        });
-    });
+      '4')
+    })
+    it('should also be used with dot notation - string',
+      () => test('{% assign my_string = "Ground control to Major Tom." %}{{ my_string.size }}', '28'))
+    it('should also be used with dot notation - array',
+      () => test('{% assign my_array = "apples, oranges, peaches, plums" | split: ", " %}{{ my_array.size }}', '4'))
+  })
 
-    describe('slice', function() {
-        it('should slice first char by 0', () => test('{{ "Liquid" | slice: 0 }}', 'L'));
-        it('should slice third char by 2', () => test('{{ "Liquid" | slice: 2 }}', 'q'));
-        it('should slice substr by 2,5', () => test('{{ "Liquid" | slice: 2, 5 }}', 'quid'));
-        it('should slice substr by -3,2', () => test('{{ "Liquid" | slice: -3, 2 }}', 'ui'));
-    });
+  describe('slice', function () {
+    it('should slice first char by 0', () => test('{{ "Liquid" | slice: 0 }}', 'L'))
+    it('should slice third char by 2', () => test('{{ "Liquid" | slice: 2 }}', 'q'))
+    it('should slice substr by 2,5', () => test('{{ "Liquid" | slice: 2, 5 }}', 'quid'))
+    it('should slice substr by -3,2', () => test('{{ "Liquid" | slice: -3, 2 }}', 'ui'))
+  })
 
-    it('should support sort', function() {
-        return test('{% assign my_array = "zebra, octopus, giraffe, Sally Snake"' +
+  it('should support sort', function () {
+    return test('{% assign my_array = "zebra, octopus, giraffe, Sally Snake"' +
             ' | split: ", " %}' +
             '{{ my_array | sort | join: ", " }}',
-            'Sally Snake, giraffe, octopus, zebra');
-    });
+    'Sally Snake, giraffe, octopus, zebra')
+  })
 
-    it('should support split', function() {
-        return test('{% assign beatles = "John, Paul, George, Ringo" | split: ", " %}' +
+  it('should support split', function () {
+    return test('{% assign beatles = "John, Paul, George, Ringo" | split: ", " %}' +
             '{% for member in beatles %}' +
             '{{ member }} ' +
             '{% endfor %}',
-            'John Paul George Ringo ');
-    });
+    'John Paul George Ringo ')
+  })
 
-    it('should support strip', function() {
-        return test('{{ "          So much room for activities!          " | strip }}',
-            'So much room for activities!');
-    });
+  it('should support strip', function () {
+    return test('{{ "          So much room for activities!          " | strip }}',
+      'So much room for activities!')
+  })
 
-    describe('strip_html', function() {
-        it('should strip all tags', function() {
-            return test('{{ "Have <em>you</em> read <strong>Ulysses</strong>?" | strip_html }}',
-                'Have you read Ulysses?');
-        });
-        it('should strip until empty', function() {
-            return test('{{"<br/><br />< p ></p></ p >" | strip_html }}', '');
-        });
-    });
+  describe('strip_html', function () {
+    it('should strip all tags', function () {
+      return test('{{ "Have <em>you</em> read <strong>Ulysses</strong>?" | strip_html }}',
+        'Have you read Ulysses?')
+    })
+    it('should strip until empty', function () {
+      return test('{{"<br/><br />< p ></p></ p >" | strip_html }}', '')
+    })
+  })
 
-    it('should support strip_newlines', function() {
-        return test('{% capture string_with_newlines %}\n' +
+  it('should support strip_newlines', function () {
+    return test('{% capture string_with_newlines %}\n' +
             'Hello\nthere\n{% endcapture %}' +
             '{{ string_with_newlines | strip_newlines }}',
-            'Hellothere');
-    });
+    'Hellothere')
+  })
 
-    describe('times', function() {
-        it('should return "6" for 3,2', () => test('{{ 3 | times: 2 }}', '6'));
-        it('should return "168" for 24,7', () => test('{{ 24 | times: 7 }}', '168'));
-        it('should return "2200.284" for 183.357,12',
-            () => test('{{ 183.357 | times: 12 }}', '2200.284'));
-    });
+  describe('times', function () {
+    it('should return "6" for 3,2', () => test('{{ 3 | times: 2 }}', '6'))
+    it('should return "168" for 24,7', () => test('{{ 24 | times: 7 }}', '168'))
+    it('should return "2200.284" for 183.357,12',
+      () => test('{{ 183.357 | times: 12 }}', '2200.284'))
+    it('should convert string to number', () => test('{{ "24" | times: "7" }}', '168'))
+  })
 
-    describe('truncate', function() {
-        it('should truncate when string too long', function() {
-            return test('{{ "Ground control to Major Tom." | truncate: 20 }}',
-                'Ground control to...');
-        });
-        it('should not truncate when string not long enough', function() {
-            return test('{{ "Ground control to Major Tom." | truncate: 80 }}',
-                'Ground control to Major Tom.');
-        });
-        it('should truncate with custom ellipsis', function() {
-            return test('{{ "Ground control to Major Tom." | truncate: 25,", and so on" }}',
-                'Ground control, and so on');
-        });
-        it('should truncate with empty custom ellipsis', function() {
-            return test('{{ "Ground control to Major Tom." | truncate: 20, "" }}',
-                'Ground control to Ma');
-        });
-    });
+  describe('truncate', function () {
+    it('should truncate when string too long', function () {
+      return test('{{ "Ground control to Major Tom." | truncate: 20 }}',
+        'Ground control to...')
+    })
+    it('should not truncate when string not long enough', function () {
+      return test('{{ "Ground control to Major Tom." | truncate: 80 }}',
+        'Ground control to Major Tom.')
+    })
+    it('should truncate with custom ellipsis', function () {
+      return test('{{ "Ground control to Major Tom." | truncate: 25,", and so on" }}',
+        'Ground control, and so on')
+    })
+    it('should truncate with empty custom ellipsis', function () {
+      return test('{{ "Ground control to Major Tom." | truncate: 20, "" }}',
+        'Ground control to Ma')
+    })
+    it('should not truncate when short enough', function () {
+      return test('{{ "12345" | truncate: 5 }}', '12345')
+    })
+    it('should default to 16', function () {
+      return test('{{ "1234567890abcdefghi" | truncate }}', '1234567890abc...')
+    })
+  })
 
-    describe('truncatewords', function() {
-        it('should truncate when too many words', function() {
-            return test('{{ "Ground control to Major Tom." | truncatewords: 3 }}',
-                'Ground control to...');
-        });
-        it('should not truncate when not enough words', function() {
-            return test('{{ "Ground control to Major Tom." | truncatewords: 8 }}',
-                'Ground control to Major Tom.');
-        });
-        it('should truncate with custom ellipsis', function() {
-            return test('{{ "Ground control to Major Tom." | truncatewords: 3, "--" }}',
-                'Ground control to--');
-        });
-        it('should truncate with empty custom ellipsis', function() {
-            return test('{{ "Ground control to Major Tom." | truncatewords: 3, "" }}',
-                'Ground control to');
-        });
-    });
+  describe('truncatewords', function () {
+    it('should truncate when too many words', function () {
+      return test('{{ "Ground control to Major Tom." | truncatewords: 3 }}',
+        'Ground control to...')
+    })
+    it('should not truncate when not enough words', function () {
+      return test('{{ "Ground control to Major Tom." | truncatewords: 8 }}',
+        'Ground control to Major Tom.')
+    })
+    it('should truncate with custom ellipsis', function () {
+      return test('{{ "Ground control to Major Tom." | truncatewords: 3, "--" }}',
+        'Ground control to--')
+    })
+    it('should truncate with empty custom ellipsis', function () {
+      return test('{{ "Ground control to Major Tom." | truncatewords: 3, "" }}',
+        'Ground control to')
+    })
+  })
 
-    it('should support uniq', function() {
-        return test('{% assign my_array = "ants, bugs, bees, bugs, ants" | split: ", " %}' +
-            '{{ my_array | uniq | join: ", " }}',
-            'ants, bugs, bees');
-    });
+  describe('uniq', function () {
+    it('should uniq string list', function () {
+      return test(
+        '{% assign my_array = "ants, bugs, bees, bugs, ants" | split: ", " %}' +
+        '{{ my_array | uniq | join: ", " }}',
+        'ants, bugs, bees'
+      )
+    })
+    it('should uniq falsy value', function () {
+      return test('{{"" | uniq | join: ","}}', '')
+    })
+  })
 
-    it('should support upcase', () => test('{{ "Parker Moore" | upcase }}', 'PARKER MOORE'));
+  it('should support upcase', () => test('{{ "Parker Moore" | upcase }}', 'PARKER MOORE'))
 
-    describe('url_encode', function() {
-        it('should encode @',
-            () => test('{{ "[email protected]" | url_encode }}', 'john%40liquid.com'));
-        it('should encode <space>',
-            () => test('{{ "Tetsuro Takara" | url_encode }}', 'Tetsuro%20Takara'));
-    });
-});
+  describe('url_encode', function () {
+    it('should encode @',
+      () => test('{{ "[email protected]" | url_encode }}', 'john%40liquid.com'))
+    it('should encode <space>',
+      () => test('{{ "Tetsuro Takara" | url_encode }}', 'Tetsuro%20Takara'))
+  })
+
+  describe('obj_test', function () {
+    liquid.registerFilter('obj_test', function () {
+      return Array.prototype.slice.call(arguments).join(',')
+    })
+    it('should support object', () => test('{{ "a" | obj_test: k1: "v1", k2: "v2" }}', 'a,k1,v1,k2,v2'))
+  })
+})

test/lexical.js

@@ -1,122 +1,131 @@
-const chai = require("chai");
-const expect = chai.expect;
+const chai = require('chai')
+const expect = chai.expect
 
-var lexical = require('../src/lexical.js');
+var lexical = require('../src/lexical.js')
 
-describe('lexical', function() {
-    it('should test filter syntax', function() {
-        lexical.filterLine.test('abs').should.equal(true);
-        lexical.filterLine.test('plus:1').should.equal(true);
-        lexical.filterLine.test('replace: "a", b').should.equal(true);
-        lexical.filterLine.test('foo: a, "b"').should.equal(true);
-        lexical.filterLine.test('abs | another').should.equal(false);
-        lexical.filterLine.test('join: "," | another').should.equal(false);
-    });
-    it('should test boolean literal', function() {
-        lexical.isLiteral('true').should.equal(true);
-        lexical.isLiteral('TrUE').should.equal(true);
-        lexical.isLiteral('false').should.equal(true);
-    });
+describe('lexical', function () {
+  it('should test filter syntax', function () {
+    expect(lexical.filterLine.test('abs')).to.equal(true)
+    expect(lexical.filterLine.test('plus:1')).to.equal(true)
+    expect(lexical.filterLine.test('replace: "a", b')).to.equal(true)
+    expect(lexical.filterLine.test('foo: a, "b"')).to.equal(true)
+    expect(lexical.filterLine.test('abs | another')).to.equal(false)
+    expect(lexical.filterLine.test('join: "," | another')).to.equal(false)
+    expect(lexical.filterLine.test('obj_test: k1: "v1", k2: "v2"')).to.equal(true)
+  })
 
-    it('should test number literal', function() {
-        lexical.isLiteral('2.3').should.equal(true);
-        lexical.isLiteral('.3').should.equal(true);
-        lexical.isLiteral('-3.').should.equal(true);
-        lexical.isLiteral('23').should.equal(true);
-    });
+  it('should test boolean literal', function () {
+    expect(lexical.isLiteral('true')).to.equal(true)
+    expect(lexical.isLiteral('TrUE')).to.equal(true)
+    expect(lexical.isLiteral('false')).to.equal(true)
+  })
 
-    it("should test range literal", function() {
-        lexical.isRange("(12..32)").should.equal(true);
-        lexical.isRange("(12..foo)").should.equal(true);
-        lexical.isRange("(foo.bar..foo)").should.equal(true);
-    });
+  it('should test number literal', function () {
+    expect(lexical.isLiteral('2.3')).to.equal(true)
+    expect(lexical.isLiteral('.3')).to.equal(true)
+    expect(lexical.isLiteral('-3.')).to.equal(true)
+    expect(lexical.isLiteral('23')).to.equal(true)
+  })
 
-    it('should test string literal', function() {
-        lexical.isLiteral('""').should.equal(true);
-        lexical.isLiteral('"a\'b"').should.equal(true);
-        lexical.isLiteral("''").should.equal(true);
-        lexical.isLiteral("'a bcd'").should.equal(true);
-    });
+  it('should test range literal', function () {
+    expect(lexical.isRange('(12..32)')).to.equal(true)
+    expect(lexical.isRange('(12..foo)')).to.equal(true)
+    expect(lexical.isRange('(foo.bar..foo)')).to.equal(true)
+  })
 
-    describe('.isVariable()', function() {
-        it('should return true for foo', function() {
-            lexical.isVariable("foo").should.equal(true);
-        });
-        it('should return true for.bar.foo', function() {
-            lexical.isVariable("foo.bar.foo").should.equal(true);
-        });
-        it('should return true for foo[0].b', function() {
-            lexical.isVariable("foo[0].b").should.equal(true);
-        });
-        it('should return true for 0a', function() {
-            lexical.isVariable("0a").should.equal(true);
-        });
-        it('should return true for foo[a.b]', function() {
-            lexical.isVariable("foo[a.b]").should.equal(true);
-        });
-        it('should return true for foo[a.b]', function() {
-            lexical.isVariable("foo['a[0]']").should.equal(true);
-        });
-        it('should return true for "var-1"', function() {
-            lexical.isVariable("var-1").should.equal(true);
-        });
-        it('should return true for "-var"', function() {
-            lexical.isVariable("-var").should.equal(true);
-        });
-        it('should return true for "var-"', function() {
-            lexical.isVariable("var-").should.equal(true);
-        });
-        it('should return true for "3-4"', function() {
-            lexical.isVariable("3-4").should.equal(true);
-        });
-    });
+  it('should test string literal', function () {
+    expect(lexical.isLiteral('""')).to.equal(true)
+    expect(lexical.isLiteral('"a\'b"')).to.equal(true)
+    expect(lexical.isLiteral("''")).to.equal(true)
+    expect(lexical.isLiteral("'a bcd'")).to.equal(true)
+  })
 
-    it('should test none literal', function() {
-        lexical.isLiteral('2a').should.equal(false);
-        lexical.isLiteral('"x').should.equal(false);
-        lexical.isLiteral('a2').should.equal(false);
-    });
+  describe('.isVariable()', function () {
+    it('should return true for foo', function () {
+      expect(lexical.isVariable('foo')).to.equal(true)
+    })
+    it('should return true for.bar.foo', function () {
+      expect(lexical.isVariable('foo.bar.foo')).to.equal(true)
+    })
+    it('should return true for foo[0].b', function () {
+      expect(lexical.isVariable('foo[0].b')).to.equal(true)
+    })
+    it('should return true for 0a', function () {
+      expect(lexical.isVariable('0a')).to.equal(true)
+    })
+    it('should return true for foo[a.b]', function () {
+      expect(lexical.isVariable('foo[a.b]')).to.equal(true)
+    })
+    it('should return true for foo[a.b]', function () {
+      expect(lexical.isVariable("foo['a[0]']")).to.equal(true)
+    })
+    it('should return true for "var-1"', function () {
+      expect(lexical.isVariable('var-1')).to.equal(true)
+    })
+    it('should return true for "-var"', function () {
+      expect(lexical.isVariable('-var')).to.equal(true)
+    })
+    it('should return true for "var-"', function () {
+      expect(lexical.isVariable('var-')).to.equal(true)
+    })
+    it('should return true for "3-4"', function () {
+      expect(lexical.isVariable('3-4')).to.equal(true)
+    })
+  })
 
-    it('should test none variable', function() {
-        lexical.isVariable("a.").should.equal(false);
-        lexical.isVariable(".b").should.equal(false);
-        lexical.isVariable(".").should.equal(false);
-        lexical.isVariable("[0][12].bar[0]").should.equal(false);
-    });
+  it('should test none literal', function () {
+    expect(lexical.isLiteral('2a')).to.equal(false)
+    expect(lexical.isLiteral('"x')).to.equal(false)
+    expect(lexical.isLiteral('a2')).to.equal(false)
+  })
 
-    it('should parse boolean literal', function() {
-        lexical.parseLiteral('true').should.equal(true);
-        lexical.parseLiteral('TrUE').should.equal(true);
-        lexical.parseLiteral('false').should.equal(false);
-    });
+  it('should test none variable', function () {
+    expect(lexical.isVariable('a.')).to.equal(false)
+    expect(lexical.isVariable('.b')).to.equal(false)
+    expect(lexical.isVariable('.')).to.equal(false)
+    expect(lexical.isVariable('[0][12].bar[0]')).to.equal(false)
+  })
 
-    it('should parse number literal', function() {
-        lexical.parseLiteral('2.3').should.equal(2.3);
-        lexical.parseLiteral('.32').should.equal(0.32);
-        lexical.parseLiteral('-23.').should.equal(-23);
-        lexical.parseLiteral('23').should.equal(23);
-    });
+  describe('.parseLiteral()', function () {
+    it('should parse boolean literal', function () {
+      expect(lexical.parseLiteral('true')).to.equal(true)
+      expect(lexical.parseLiteral('TrUE')).to.equal(true)
+      expect(lexical.parseLiteral('false')).to.equal(false)
+    })
 
-    it('should parse string literal', function() {
-        lexical.parseLiteral('"ab\'c"').should.equal("ab\'c");
-    });
+    it('should parse number literal', function () {
+      expect(lexical.parseLiteral('2.3')).to.equal(2.3)
+      expect(lexical.parseLiteral('.32')).to.equal(0.32)
+      expect(lexical.parseLiteral('-23.')).to.equal(-23)
+      expect(lexical.parseLiteral('23')).to.equal(23)
+    })
 
-    describe('.matchValue()', function(){
-        it('should match -5-5', function() {
-            var match = lexical.matchValue('-5-5');
-            expect(match && match[0]).to.equal('-5-5');
-        });
-        it('should match 4-3', function() {
-            var match = lexical.matchValue('4-3');
-            expect(match && match[0]).to.equal('4-3');
-        });
-        it('should match 4-3', function() {
-            var match = lexical.matchValue('4-3');
-            expect(match && match[0]).to.equal('4-3');
-        });
-        it('should match var-1', function() {
-            var match = lexical.matchValue('var-1');
-            expect(match && match[0]).to.equal('var-1');
-        });
-    });
-});
+    it('should parse string literal', function () {
+      expect(lexical.parseLiteral('"ab\'c"')).to.equal("ab'c")
+    })
+
+    it('should throw if non-literal', function () {
+      var fn = () => lexical.parseLiteral('a')
+      expect(fn).to.throw("cannot parse 'a' as literal")
+    })
+  })
+
+  describe('.matchValue()', function () {
+    it('should match -5-5', function () {
+      var match = lexical.matchValue('-5-5')
+      expect(match && match[0]).to.equal('-5-5')
+    })
+    it('should match 4-3', function () {
+      var match = lexical.matchValue('4-3')
+      expect(match && match[0]).to.equal('4-3')
+    })
+    it('should match 4-3', function () {
+      var match = lexical.matchValue('4-3')
+      expect(match && match[0]).to.equal('4-3')
+    })
+    it('should match var-1', function () {
+      var match = lexical.matchValue('var-1')
+      expect(match && match[0]).to.equal('var-1')
+    })
+  })
+})

test/liquid.js

@@ -1,177 +1,232 @@
-const chai = require("chai");
-const expect = chai.expect;
-const Liquid = require('..');
-const mock = require('mock-fs');
-chai.use(require("chai-as-promised"));
+const chai = require('chai')
+const expect = chai.expect
+const Liquid = require('..')
+const mock = require('mock-fs')
+chai.use(require('chai-as-promised'))
 
-describe('liquid', function() {
-    var engine, strictEngine, ctx;
-    beforeEach(function() {
-        ctx = {
-            name: 'harttle',
-            arr: [-2, 'a'],
-            obj: {
-                foo: 'bar'
-            }
-        };
-        engine = Liquid({
-            root: '/root/',
-            extname: '.html'
-        });
-        strictEngine = Liquid({
-            root: '/root',
-            extname: '.html',
-            strict_filters: true
-        });
-        mock({
-            '/root/files/foo.html': 'foo',
-            '/root/files/name.html': 'My name is {{name}}.',
-            '/un-readable.html': mock.file({
-                mode: '0000'
-            })
-        });
-    });
-    afterEach(function() {
-        mock.restore();
-    });
-    describe('{{output}}', function() {
-        it('should output object', function() {
-            return engine.parseAndRender('{{obj}}', ctx).should.eventually.equal('{"foo":"bar"}');
-        });
-        it('should output array', function() {
-            return engine.parseAndRender('{{arr}}', ctx).should.eventually.equal('[-2,"a"]');
-        });
-        it('should output undefined to empty', function() {
-            return engine.parseAndRender('foo{{zzz}}bar', ctx).should.eventually.equal('foobar');
-        });
-        it('should render as null when filter undefined', function() {
-            return engine.parseAndRender('{{"foo" | filter1}}', ctx).should.eventually.equal('foo');
-        });
-        it('should throw upon undefined filter when strict_filters set', function() {
-            return expect(strictEngine.parseAndRender('{{arr | filter1}}', ctx)).to
-                .be.rejectedWith(/undefined filter: filter1/);
-        });
-    });
-    it('should parse html', function() {
-        (function() {
-            engine.parse('{{obj}}');
-        }).should.not.throw();
-        (function() {
-            engine.parse('<html><head>{{obj}}</head></html>');
-        }).should.not.throw();
-    });
-    it('should render template multiple times', function() {
-        var template = engine.parse('{{obj}}');
+describe('liquid', function () {
+  var engine, strictEngine, ctx
+  beforeEach(function () {
+    ctx = {
+      name: 'harttle',
+      arr: [-2, 'a'],
+      obj: {
+        foo: 'bar'
+      }
+    }
+    engine = Liquid({
+      root: '/root/',
+      extname: '.html'
+    })
+    strictEngine = Liquid({
+      root: '/root',
+      extname: '.html',
+      strict_filters: true
+    })
+    mock({
+      '/root/files/foo.html': 'foo',
+      '/root/files/name.html': 'My name is {{name}}.',
+      '/un-readable.html': mock.file({
+        mode: '0000'
+      })
+    })
+  })
+  afterEach(function () {
+    mock.restore()
+  })
+  describe('Liquid', function () {
+    it('should ignore invalid root option', function () {
+      var liquid = Liquid({ root: /regex/ })
+      expect(liquid.options.root).to.deep.equal([])
+    })
+  })
+  describe('{{output}}', function () {
+    it('should output object', function () {
+      return expect(engine.parseAndRender('{{obj}}', ctx)).to.eventually.equal('{"foo":"bar"}')
+    })
+    it('should output array', function () {
+      return expect(engine.parseAndRender('{{arr}}', ctx)).to.eventually.equal('[-2,"a"]')
+    })
+    it('should output undefined to empty', function () {
+      return expect(engine.parseAndRender('foo{{zzz}}bar', ctx)).to.eventually.equal('foobar')
+    })
+    it('should render as null when filter undefined', function () {
+      return expect(engine.parseAndRender('{{"foo" | filter1}}', ctx)).to.eventually.equal('foo')
+    })
+    it('should throw upon undefined filter when strict_filters set', function () {
+      return expect(strictEngine.parseAndRender('{{arr | filter1}}', ctx)).to
+        .be.rejectedWith(/undefined filter: filter1/)
+    })
+  })
+  it('should parse html', function () {
+    expect(function () {
+      engine.parse('{{obj}}')
+    }).to.not.throw()
+    expect(function () {
+      engine.parse('<html><head>{{obj}}</head></html>')
+    }).to.not.throw()
+  })
+  it('should render template multiple times', function () {
+    var template = engine.parse('{{obj}}')
+    return engine.render(template, ctx)
+      .then((result) => {
+        expect(result).to.equal('{"foo":"bar"}')
         return engine.render(template, ctx)
-            .then((result) => {
-                expect(result).to.equal('{"foo":"bar"}');
-                return engine.render(template, ctx);
-            })
-            .then((result) => {
-                return expect(result).to.equal('{"foo":"bar"}');
-            });
-    });
-    it('should render filters', function() {
-        var template = engine.parse('<p>{{arr | join: "_"}}</p>');
-        return engine.render(template, ctx).should.eventually.equal('<p>-2_a</p>');
-    });
-    it('should render accessive filters', function() {
-        var src = '{% assign my_array = "apples, oranges, peaches, plums" | split: ", " %}' +
-            '{{ my_array | first }}';
-        return expect(engine.parseAndRender(src)).to.eventually.equal('apples');
-    });
-    describe('#renderFile()', function() {
-        it('should render file', function() {
-            return expect(engine.renderFile('/root/files/foo.html', ctx))
-                .to.eventually.equal('foo');
-        });
-        it('should accept relative path', function() {
-            return expect(engine.renderFile('files/foo.html'))
-                .to.eventually.equal('foo');
-        });
-        it('should resolve array as root', function(){
-            engine = Liquid({
-                root: ['/boo', '/root/'],
-                extname: '.html'
-            });
-            return expect(engine.renderFile('files/foo.html'))
-                .to.eventually.equal('foo');
-        });
-        it('should default root to cwd', function(){
-            var files = {};
-            files[process.cwd() + '/foo.html'] = 'FOO';
-            mock(files);
+      })
+      .then((result) => {
+        return expect(result).to.equal('{"foo":"bar"}')
+      })
+  })
+  it('should render filters', function () {
+    var template = engine.parse('<p>{{arr | join: "_"}}</p>')
+    return expect(engine.render(template, ctx)).to.eventually.equal('<p>-2_a</p>')
+  })
+  it('should render accessive filters', function () {
+    var src = '{% assign my_array = "apples, oranges, peaches, plums" | split: ", " %}' +
+      '{{ my_array | first }}'
+    return expect(engine.parseAndRender(src)).to.eventually.equal('apples')
+  })
+  describe('#renderFile()', function () {
+    it('should render file', function () {
+      return expect(engine.renderFile('/root/files/foo.html', ctx))
+        .to.eventually.equal('foo')
+    })
+    it('should accept relative path', function () {
+      return expect(engine.renderFile('files/foo.html'))
+        .to.eventually.equal('foo')
+    })
+    it('should resolve array as root', function () {
+      engine = Liquid({
+        root: ['/boo', '/root/'],
+        extname: '.html'
+      })
+      return expect(engine.renderFile('files/foo.html'))
+        .to.eventually.equal('foo')
+    })
+    it('should default root to cwd', function () {
+      var files = {}
+      files[process.cwd() + '/foo.html'] = 'FOO'
+      mock(files)
 
-            engine = Liquid({
-                extname: '.html'
-            });
-            return expect(engine.renderFile('foo.html'))
-                .to.eventually.equal('FOO');
-        });
-        it('should render file with context', function() {
-            return engine.renderFile('/root/files/name.html', ctx).should.eventually.equal('My name is harttle.');
-        });
-        it('should use default extname', function() {
-            return engine.renderFile('files/name', ctx).should.eventually.equal('My name is harttle.');
-        });
-        it('should throw with lookup list when file not exist', function() {
-            engine = Liquid({
-                root: ['/boo', '/root/'],
-                extname: '.html'
-            });
-            return expect(engine.renderFile('/not/exist.html')).to
-                .be.rejectedWith(/failed to lookup \/not\/exist.html in: \/boo,\/root\//i);
-        });
-        it('should throw when file not readable', function() {
-            return expect(engine.renderFile('/un-readable.html')).to
-                .be.rejectedWith(/EACCES/);
-        });
-    });
-    describe('strict', function() {
-        it('should not throw when strict_variables false (default)', function() {
-            return expect(engine.parseAndRender('before{{notdefined}}after', ctx)).to
-                .eventually.equal('beforeafter');
-        });
-        it('should throw when strict_variables true', function() {
-            var tpl = engine.parse('before{{notdefined}}after');
-            var opts = {
-                strict_variables: true
-            };
-            return expect(engine.render(tpl, ctx, opts)).to
-                .be.rejectedWith(/undefined variable: notdefined/);
-        });
-        it('should pass strict_variables to render by parseAndRender', function() {
-            var html = 'before{{notdefined}}after';
-            var opts = {
-                strict_variables: true
-            };
-            return expect(engine.parseAndRender(html, ctx, opts)).to
-                .be.rejectedWith(/undefined variable: notdefined/);
-        });
-    });
-    describe('cache', function() {
-        it('should be disabled by default', function() {
-            return engine.renderFile('files/foo')
-                .then(x => expect(x).to.equal('foo'))
-                .then(() => mock({
-                    '/root/files/foo.html': 'bar'
-                }))
-                .then(() => engine.renderFile('files/foo'))
-                .then(x => expect(x).to.equal('bar'));
-        });
-        it('should respect cache=true option', function() {
-            engine = Liquid({
-                root: '/root/',
-                extname: '.html',
-                cache: true
-            });
-            return engine.renderFile('files/foo')
-                .then(x => expect(x).to.equal('foo'))
-                .then(() => mock({
-                    '/root/files/foo.html': 'bar'
-                }))
-                .then(() => engine.renderFile('files/foo'))
-                .then(x => expect(x).to.equal('foo'));
-        });
-    });
-});
+      engine = Liquid({
+        extname: '.html'
+      })
+      return expect(engine.renderFile('foo.html'))
+        .to.eventually.equal('FOO')
+    })
+    it('should render file with context', function () {
+      return expect(engine.renderFile('/root/files/name.html', ctx)).to.eventually.equal('My name is harttle.')
+    })
+    it('should use default extname', function () {
+      return expect(engine.renderFile('files/name', ctx)).to.eventually.equal('My name is harttle.')
+    })
+    it('should throw with lookup list when file not exist', function () {
+      engine = Liquid({
+        root: ['/boo', '/root/'],
+        extname: '.html'
+      })
+      return expect(engine.renderFile('/not/exist.html')).to
+        .be.rejectedWith(/failed to lookup \/not\/exist.html in: \/boo,\/root\//i)
+    })
+    it('should throw when file not readable', function () {
+      return expect(engine.renderFile('/un-readable.html')).to
+        .be.rejectedWith(/EACCES/)
+    })
+  })
+  describe('strict', function () {
+    it('should not throw when strict_variables false (default)', function () {
+      return expect(engine.parseAndRender('before{{notdefined}}after', ctx)).to
+        .eventually.equal('beforeafter')
+    })
+    it('should throw when strict_variables true', function () {
+      var tpl = engine.parse('before{{notdefined}}after')
+      var opts = {
+        strict_variables: true
+      }
+      return expect(engine.render(tpl, ctx, opts)).to
+        .be.rejectedWith(/undefined variable: notdefined/)
+    })
+    it('should pass strict_variables to render by parseAndRender', function () {
+      var html = 'before{{notdefined}}after'
+      var opts = {
+        strict_variables: true
+      }
+      return expect(engine.parseAndRender(html, ctx, opts)).to
+        .be.rejectedWith(/undefined variable: notdefined/)
+    })
+  })
+  describe('cache', function () {
+    it('should be disabled by default', function () {
+      return engine.renderFile('files/foo')
+        .then(x => expect(x).to.equal('foo'))
+        .then(() => mock({
+          '/root/files/foo.html': 'bar'
+        }))
+        .then(() => engine.renderFile('files/foo'))
+        .then(x => expect(x).to.equal('bar'))
+    })
+    it('should respect cache=true option', function () {
+      engine = Liquid({
+        root: '/root/',
+        extname: '.html',
+        cache: true
+      })
+      return engine.renderFile('files/foo')
+        .then(x => expect(x).to.equal('foo'))
+        .then(() => mock({
+          '/root/files/foo.html': 'bar'
+        }))
+        .then(() => engine.renderFile('files/foo'))
+        .then(x => expect(x).to.equal('foo'))
+    })
+  })
+  describe('trim_left, trim_right', function () {
+    it('should trim_left for tags when trim_left=true', function () {
+      engine = Liquid({
+        trim_left: true
+      })
+      return expect(engine.parseAndRender(' \n \t{%if true%}foo{%endif%} '))
+        .to.eventually.equal(' \nfoo ')
+    })
+    it('should trim_right for tags when trim_right=true', function () {
+      engine = Liquid({
+        trim_right: true
+      })
+      return expect(engine.parseAndRender('\t{%if true%}foo{%endif%} \n'))
+        .to.eventually.equal('\tfoo')
+    })
+    it('should trim all blanks before and after when greedy=true', function () {
+      engine = Liquid({
+        greedy: true
+      })
+      return expect(engine.parseAndRender('\t{%-if true%}foo{%endif-%} \n \n'))
+        .to.eventually.equal('foo')
+    })
+    it('should support trim using markup', function () {
+      engine = Liquid()
+      var src = [
+        '{%- assign username = "John G. Chalmers-Smith" -%}',
+        '{%- if username and username.length > 10 -%}',
+        '  Wow, {{ username }}, you have a long name!',
+        '{%- else -%}',
+        '  Hello there!',
+        '{%- endif -%}\n'
+      ].join('\n')
+      var dst = '  Wow, John G. Chalmers-Smith, you have a long name!\n'
+      return expect(engine.parseAndRender(src)).to.eventually.equal(dst)
+    })
+    it('should not trim when not specified', function () {
+      engine = Liquid()
+      var src = [
+        '{% assign username = "John G. Chalmers-Smith" %}',
+        '{% if username and username.length > 10 %}',
+        '  Wow, {{ username }}, you have a long name!',
+        '{% else %}',
+        '  Hello there!',
+        '{% endif %}\n'
+      ].join('\n')
+      var dst = '\n\n  Wow, John G. Chalmers-Smith, you have a long name!\n\n'
+      return expect(engine.parseAndRender(src)).to.eventually.equal(dst)
+    })
+  })
+})

test/parser.js

@@ -1,49 +1,47 @@
-const chai = require("chai");
-const sinon = require("sinon");
-const sinonChai = require("sinon-chai");
-const should = chai.should();
-const expect = chai.expect;
+const chai = require('chai')
+const expect = chai.expect
 
-chai.use(sinonChai);
+chai.use(require('sinon-chai'))
 
-var filter = require('../src/filter.js')();
-var tag = require('../src/tag.js')();
-var Template = require('../src/parser.js');
+var filter = require('../src/filter.js')()
+var tag = require('../src/tag.js')()
+var Template = require('../src/parser.js')
 
-describe('template', function() {
-    var scope, template, add = (l, r) => l + r;
+describe('template', function () {
+  var template
+  var add = (l, r) => l + r
 
-    beforeEach(function() {
-        filter.clear();
-        filter.register('add', add);
+  beforeEach(function () {
+    filter.clear()
+    filter.register('add', add)
 
-        tag.clear();
-        template = Template(tag, filter);
-    });
+    tag.clear()
+    template = Template(tag, filter)
+  })
 
-    it('should throw when output string illegal', function() {
-        expect(function() {
-            template.parseOutput('/');
-        }).to.throw(/illegal output string/);
-    });
+  it('should throw when output string illegal', function () {
+    expect(function () {
+      template.parseOutput('/')
+    }).to.throw(/illegal output string/)
+  })
 
-    it('should parse output string', function() {
-        var tpl = template.parseOutput('foo');
-        expect(tpl.type).to.equal('output');
-        expect(tpl.initial).to.equal('foo');
-        expect(tpl.filters).to.deep.equal([]);
-    });
+  it('should parse output string', function () {
+    var tpl = template.parseOutput('foo')
+    expect(tpl.type).to.equal('output')
+    expect(tpl.initial).to.equal('foo')
+    expect(tpl.filters).to.deep.equal([])
+  })
 
-    it('should parse output string with a simple filter', function() {
-        var tpl = template.parseOutput('foo | add: 3, "foo"');
-        expect(tpl.initial).to.equal('foo');
-        expect(tpl.filters.length).to.equal(1);
-        expect(tpl.filters[0].filter).to.equal(add);
-    });
+  it('should parse output string with a simple filter', function () {
+    var tpl = template.parseOutput('foo | add: 3, "foo"')
+    expect(tpl.initial).to.equal('foo')
+    expect(tpl.filters.length).to.equal(1)
+    expect(tpl.filters[0].filter).to.equal(add)
+  })
 
-    it('should parse output string with filters', function() {
-        var tpl = template.parseOutput('foo | add: "|" | add');
-        expect(tpl.initial).to.equal('foo');
-        expect(tpl.filters.length).to.equal(2);
-    });
-});
+  it('should parse output string with filters', function () {
+    var tpl = template.parseOutput('foo | add: "|" | add')
+    expect(tpl.initial).to.equal('foo')
+    expect(tpl.filters.length).to.equal(2)
+  })
+})

test/render.js

@@ -1,67 +1,66 @@
-const chai = require("chai");
-const chaiAsPromised = require("chai-as-promised");
-const should = chai.should();
-const expect = chai.expect;
-const sinonChai = require("sinon-chai");
-const sinon = require("sinon");
+const chai = require('chai')
+const chaiAsPromised = require('chai-as-promised')
+const expect = chai.expect
+const sinonChai = require('sinon-chai')
+const sinon = require('sinon')
 
-chai.use(sinonChai);
-chai.use(chaiAsPromised);
+chai.use(sinonChai)
+chai.use(chaiAsPromised)
 
-var tag = require('../src/tag.js')();
-var Scope = require('../src/scope.js');
-var filter = require('../src/filter')();
-var Render = require('../src/render.js');
-var Template = require('../src/parser.js')(tag, filter);
+var tag = require('../src/tag.js')()
+var Scope = require('../src/scope.js')
+var filter = require('../src/filter')()
+var Render = require('../src/render.js')
+var Template = require('../src/parser.js')(tag, filter)
 
-describe('render', function() {
-    var scope, render;
+describe('render', function () {
+  var scope, render
 
-    beforeEach(function() {
-        scope = Scope.factory({
-            foo: {
-                bar: ['a', 2]
-            }
-        });
-        filter.clear();
-        tag.clear();
-        render = Render();
-    });
+  beforeEach(function () {
+    scope = Scope.factory({
+      foo: {
+        bar: ['a', 2]
+      }
+    })
+    filter.clear()
+    tag.clear()
+    render = Render()
+  })
 
-    describe('.renderTemplates()', function(){
-        it('should throw when scope undefined', function() {
-            expect(function(){
-                render.renderTemplates([]);
-            }).to.throw(/scope undefined/);
-        });
+  describe('.renderTemplates()', function () {
+    it('should throw when scope undefined', function () {
+      expect(function () {
+        render.renderTemplates([])
+      }).to.throw(/scope undefined/)
+    })
 
-        it('should render html', function() {
-            return render.renderTemplates([{type: 'html', value: '<p>'}], scope).should.eventually.equal('<p>');
-        });
-    });
+    it('should render html', function () {
+      return expect(render.renderTemplates([{type: 'html', value: '<p>'}], scope)).to.eventually.equal('<p>')
+    })
+  })
 
-    it('should eval filter with correct arguments', function() {
-        var date = sinon.stub().returns('y');
-        var time = sinon.spy();
-        filter.register('date', date);
-        filter.register('time', time);
-        var tpl = Template.parseOutput('foo.bar[0] | date: "b" | time:2');
-        render.evalOutput(tpl, scope);
-        expect(date).to.have.been.calledWith('a', 'b');
-        expect(time).to.have.been.calledWith('y', 2);
-    });
+  it('should eval filter with correct arguments', function () {
+    var date = sinon.stub().returns('y')
+    var time = sinon.spy()
+    filter.register('date', date)
+    filter.register('time', time)
+    var tpl = Template.parseOutput('foo.bar[0] | date: "b" | time:2')
+    render.evalOutput(tpl, scope)
+    expect(date).to.have.been.calledWith('a', 'b')
+    expect(time).to.have.been.calledWith('y', 2)
+  })
 
-    describe('.evalOutput()', function(){
-        it('should throw when scope undefined', function() {
-            expect(function(){
-                render.evalOutput();
-            }).to.throw(/scope undefined/);
-        });
-        it('should eval output', function() {
-            filter.register('date', (l, r) => l + r);
-            filter.register('time', (l, r) => l + 3 * r);
-            var tpl = Template.parseOutput('foo.bar[0] | date: "b" | time:2');
-            expect(render.evalOutput(tpl, scope)).to.equal('ab6');
-        });
-    });
-});
+  describe('.evalOutput()', function () {
+    it('should throw when scope undefined', function () {
+      expect(function () {
+        render.evalOutput()
+      }).to.throw(/scope undefined/)
+    })
+    it('should eval output', function () {
+      filter.register('date', (l, r) => l + r)
+      filter.register('time', (l, r) => l + 3 * r)
+      var tpl = Template.parseOutput('foo.bar[0] | date: "b" | time:2')
+      expect(render.evalOutput(tpl, scope)).to.equal('ab6')
+    })
+  })
+})

test/scope.js

@@ -1,189 +1,223 @@
-const chai = require("chai");
-const expect = chai.expect;
+const chai = require('chai')
+const expect = chai.expect
 
-var Scope = require('../src/scope.js');
+var Scope = require('../src/scope.js')
 
-describe('scope', function() {
-    var scope, ctx;
-    beforeEach(function() {
-        ctx = {
-            foo: 'zoo',
-            bar: {
-                zoo: 'coo',
-                "Mr.Smith": 'John',
-                arr: ['a', 'b']
-            }
-        };
-        scope = Scope.factory(ctx);
-    });
+describe('scope', function () {
+  var scope, ctx
+  beforeEach(function () {
+    ctx = {
+      foo: 'zoo',
+      bar: {
+        zoo: 'coo',
+        'Mr.Smith': 'John',
+        arr: ['a', 'b']
+      }
+    }
+    scope = Scope.factory(ctx)
+  })
 
-    describe('#propertyAccessSeq()', function() {
-        it('should handle dot syntax', function() {
-            expect(scope.propertyAccessSeq('foo.bar'))
-                .to.deep.equal(['foo', 'bar']);
-        });
-        it('should handle [<String>] syntax', function() {
-            expect(scope.propertyAccessSeq('foo["bar"]'))
-                .to.deep.equal(['foo', 'bar']);
-        });
-        it('should handle [<Identifier>] syntax', function() {
-            expect(scope.propertyAccessSeq('foo[foo]'))
-                .to.deep.equal(['foo', 'zoo']);
-        });
-        it('should handle nested access', function() {
-            expect(scope.propertyAccessSeq('foo[bar.zoo]'))
-                .to.deep.equal(['foo', 'coo']);
-            expect(scope.propertyAccessSeq('foo[bar["zoo"]]'))
-                .to.deep.equal(['foo', 'coo']);
-        });
-    });
+  describe('#propertyAccessSeq()', function () {
+    it('should handle dot syntax', function () {
+      expect(scope.propertyAccessSeq('foo.bar'))
+        .to.deep.equal(['foo', 'bar'])
+    })
+    it('should handle [<String>] syntax', function () {
+      expect(scope.propertyAccessSeq('foo["bar"]'))
+        .to.deep.equal(['foo', 'bar'])
+    })
+    it('should handle [<Identifier>] syntax', function () {
+      expect(scope.propertyAccessSeq('foo[foo]'))
+        .to.deep.equal(['foo', 'zoo'])
+    })
+    it('should handle nested access 1', function () {
+      expect(scope.propertyAccessSeq('foo[bar.zoo]'))
+        .to.deep.equal(['foo', 'coo'])
+    })
+    it('should handle nested access 2', function () {
+      expect(scope.propertyAccessSeq('foo[bar["zoo"]]'))
+        .to.deep.equal(['foo', 'coo'])
+    })
+    it('should handle nested access 3', function () {
+      expect(scope.propertyAccessSeq('bar["foo"].zoo'))
+        .to.deep.equal(['bar', 'foo', 'zoo'])
+    })
+    it('should handle nested access 4', function () {
+      expect(scope.propertyAccessSeq('foo[0].bar'))
+        .to.deep.equal(['foo', '0', 'bar'])
+    })
+  })
 
-    describe('#get()', function() {
-        it('should get direct property', function() {
-            expect(scope.get('foo')).equal('zoo');
-        });
+  describe('#get()', function () {
+    it('should get direct property', function () {
+      expect(scope.get('foo')).equal('zoo')
+    })
 
-        it('should get undefined property', function() {
-            function fn() {
-                scope.get('notdefined');
-            }
-            expect(fn).to.not.throw();
-            expect(scope.get('notdefined')).to.equal(undefined);
-            expect(scope.get('')).to.equal(undefined);
-            expect(scope.get(false)).to.equal(undefined);
-        });
+    it('should get undefined property', function () {
+      function fn () {
+        scope.get('notdefined')
+      }
+      expect(fn).to.not.throw()
+      expect(scope.get('notdefined')).to.equal(undefined)
+      expect(scope.get('')).to.equal(undefined)
+      expect(scope.get(false)).to.equal(undefined)
+    })
 
-        it('should throw when [] unbalanced', function() {
-            expect(function() {
-                scope.get('foo[bar');
-            }).to.throw(/unbalanced \[\]/);
-        });
+    it('should throw when [] unbalanced', function () {
+      expect(function () {
+        scope.get('foo[bar')
+      }).to.throw(/unbalanced \[\]/)
+    })
 
-        it('should throw when "" unbalanced', function() {
-            expect(function() {
-                scope.get('foo["bar]');
-            }).to.throw(/unbalanced "/);
-        });
+    it('should throw when "" unbalanced', function () {
+      expect(function () {
+        scope.get('foo["bar]')
+      }).to.throw(/unbalanced "/)
+    })
 
-        it("should throw when '' unbalanced", function() {
-            expect(function() {
-                scope.get("foo['bar]");
-            }).to.throw(/unbalanced '/);
-        });
+    it("should throw when '' unbalanced", function () {
+      expect(function () {
+        scope.get("foo['bar]")
+      }).to.throw(/unbalanced '/)
+    })
 
-        it('should access child property via dot syntax', function() {
-            expect(scope.get('bar.zoo')).to.equal('coo');
-            expect(scope.get('bar.arr')).to.deep.equal(['a', 'b']);
-        });
+    it('should access child property via dot syntax', function () {
+      expect(scope.get('bar.zoo')).to.equal('coo')
+      expect(scope.get('bar.arr')).to.deep.equal(['a', 'b'])
+    })
 
-        it('should access child property via [<String>] syntax', function() {
-            expect(scope.get('bar["zoo"]')).to.equal('coo');
-        });
+    it('should access child property via [<String>] syntax', function () {
+      expect(scope.get('bar["zoo"]')).to.equal('coo')
+    })
 
-        it('should access child property via [<Number>] syntax', function() {
-            expect(scope.get('bar.arr[0]')).to.equal('a');
-        });
+    it('should access child property via [<Number>] syntax', function () {
+      expect(scope.get('bar.arr[0]')).to.equal('a')
+    })
 
-        it('should access child property via [<Identifier>] syntax', function() {
-            expect(scope.get('bar[foo]')).to.equal('coo');
-        });
+    it('should access child property via [<Identifier>] syntax', function () {
+      expect(scope.get('bar[foo]')).to.equal('coo')
+    })
 
-        it('should support nested case', function() {
-            scope.set('posts', {
-                "first": {
-                    "name": "A Nice Day"
-                }
-            });
-            scope.set('category', {
-                "diary": ["first"]
-            });
-            expect(scope.get('posts[category.diary[0]].name'), 'A Nice Day');
-        });
-    });
+    it('should return undefined when not exist', function () {
+      expect(scope.get('foo.foo.foo')).to.be.undefined
+    })
+  })
 
-    describe('strict_variables', function() {
-        var scope;
-        beforeEach(function(){
-            scope = Scope.factory(ctx, {
-                strict_variables: true
-            });
-        });
-        it('should throw undefined in strict mode', function() {
-            function fn() {
-                scope.get('notdefined');
-            }
-            expect(fn).to.throw(/undefined variable: notdefined/);
-        });
-        it('should find variable in parent scope', function() {
-            scope.set('foo', 'foo');
-            scope.push({
-                'bar': 'bar'
-            });
-            expect(scope.get('foo')).to.equal('foo');
-        });
-    });
+  describe('#set', function () {
+    it('should set nested value', function () {
+      scope.set('posts', {
+        'first': {
+          'name': 'A Nice Day'
+        }
+      })
+      scope.set('category', {
+        'diary': ['first']
+      })
+      expect(scope.get('posts[category.diary[0]].name'), 'A Nice Day')
+    })
 
-    describe('.getAll()', function() {
-        it('should get all properties when arguments empty', function() {
-            expect(scope.getAll()).deep.equal(ctx);
-        });
-    });
+    it('should create in parent scope if needed', function () {
+      scope.push({})
+      scope.set('bar.coo', 'COO')
+      expect(scope.get('bar.coo')).to.equal('COO')
+    })
+    it("should set parents' corresponding value", function () {
+      scope.push({})
+      scope.set('foo', 'bar')
+      scope.pop()
+      expect(scope.get('foo')).to.equal('bar')
+    })
+  })
+  describe('strict_variables', function () {
+    var scope
+    beforeEach(function () {
+      scope = Scope.factory(ctx, {
+        strict_variables: true
+      })
+    })
+    it('should throw when variable not defined', function () {
+      function fn () {
+        scope.get('notdefined')
+      }
+      expect(fn).to.throw(/undefined variable: notdefined/)
+    })
+    it('should throw when deep variable not exist', function () {
+      scope.set('foo', 'bar')
+      function fn () {
+        scope.get('foo.bar.not.defined')
+      }
+      expect(fn).to.throw(/undefined variable: not/)
+    })
+    it('should find variable in parent scope', function () {
+      scope.set('foo', 'foo')
+      scope.push({
+        'bar': 'bar'
+      })
+      expect(scope.get('foo')).to.equal('foo')
+    })
+  })
 
-    describe('.push()', function() {
-        it('should throw when trying to push non-object', function() {
-            expect(function() {
-                scope.push(false);
-            }).to.throw();
-        });
-        it('should push scope', function() {
-            scope.set('bar', 'bar');
-            scope.push({
-                foo: 'foo'
-            });
-            expect(scope.get('foo')).to.equal('foo');
-            expect(scope.get('bar')).to.equal('bar');
-        });
-        it('should hide deep properties by push', function(){
-            scope.set('bar', {bar: 'bar'});
-            scope.push({bar: {foo: 'foo'}});
-            expect(scope.get('bar.foo')).to.equal('foo');
-            expect(scope.get('bar.bar')).to.equal(undefined);
-        });
-    });
-    describe('.pop()', function() {
-        it('should pop scope', function() {
-            scope.push({
-                foo: 'foo'
-            });
-            scope.pop();
-            expect(scope.get('foo')).to.equal('zoo');
-        });
-    });
+  describe('.getAll()', function () {
+    it('should get all properties when arguments empty', function () {
+      expect(scope.getAll()).deep.equal(ctx)
+    })
+  })
 
-    describe('.unshift()', function() {
-        it('should throw when trying to unshift non-object', function() {
-            expect(function() {
-                scope.unshift(false);
-            }).to.throw();
-        });
-        it('should unshift scope', function() {
-            scope.unshift({
-                foo: 'blue',
-                foo1: 'foo1'
-            });
-            expect(scope.get('foo')).to.equal('zoo');
-            expect(scope.get('foo1')).to.equal('foo1');
-        });
-    });
-    describe('.shift()', function() {
-        it('should shift scope', function() {
-            scope.unshift({
-                foo: 'blue',
-                foo1: 'foo1'
-            });
-            scope.shift();
-            expect(scope.get('foo')).to.equal('zoo');
-            expect(scope.get('foo1')).to.equal(undefined);
-        });
-    });
-});
+  describe('.push()', function () {
+    it('should throw when trying to push non-object', function () {
+      expect(function () {
+        scope.push(false)
+      }).to.throw()
+    })
+    it('should push scope', function () {
+      scope.set('bar', 'bar')
+      scope.push({
+        foo: 'foo'
+      })
+      expect(scope.get('foo')).to.equal('foo')
+      expect(scope.get('bar')).to.equal('bar')
+    })
+    it('should hide deep properties by push', function () {
+      scope.set('bar', {bar: 'bar'})
+      scope.push({bar: {foo: 'foo'}})
+      expect(scope.get('bar.foo')).to.equal('foo')
+      expect(scope.get('bar.bar')).to.equal(undefined)
+    })
+  })
+  describe('.pop()', function () {
+    it('should pop scope', function () {
+      scope.push({
+        foo: 'foo'
+      })
+      scope.pop()
+      expect(scope.get('foo')).to.equal('zoo')
+    })
+  })
+
+  describe('.unshift()', function () {
+    it('should throw when trying to unshift non-object', function () {
+      expect(function () {
+        scope.unshift(false)
+      }).to.throw()
+    })
+    it('should unshift scope', function () {
+      scope.unshift({
+        foo: 'blue',
+        foo1: 'foo1'
+      })
+      expect(scope.get('foo')).to.equal('zoo')
+      expect(scope.get('foo1')).to.equal('foo1')
+    })
+  })
+  describe('.shift()', function () {
+    it('should shift scope', function () {
+      scope.unshift({
+        foo: 'blue',
+        foo1: 'foo1'
+      })
+      scope.shift()
+      expect(scope.get('foo')).to.equal('zoo')
+      expect(scope.get('foo1')).to.equal(undefined)
+    })
+  })
+})

test/syntax.js

@@ -1,65 +1,87 @@
-const chai = require("chai");
-const expect = chai.expect;
-var syntax = require('../src/syntax.js');
-var Scope = require('../src/scope.js');
+const chai = require('chai')
+const expect = chai.expect
+var syntax = require('../src/syntax.js')
+var Scope = require('../src/scope.js')
 
-var evalExp = syntax.evalExp;
-var evalValue = syntax.evalValue;
+var evalExp = syntax.evalExp
+var evalValue = syntax.evalValue
+var isTruthy = syntax.isTruthy
 
-describe('expression', function() {
-    var scope;
+describe('expression', function () {
+  var scope
 
-    beforeEach(function() {
-        scope = Scope.factory({
-            one: 1,
-            two: 2,
-            x: 'XXX'
-        });
-    });
+  beforeEach(function () {
+    scope = Scope.factory({
+      one: 1,
+      two: 2,
+      x: 'XXX',
+      y: undefined,
+      z: null
+    })
+  })
 
-    it('should eval literals', function() {
-        expect(evalValue('2.3')).to.equal(2.3);
-        expect(evalValue('"foo"')).to.equal("foo");
-    });
+  describe('.evalValue()', function () {
+    it('should eval literals', function () {
+      expect(evalValue('2.3')).to.equal(2.3)
+      expect(evalValue('"foo"')).to.equal('foo')
+    })
 
-    it('should throw on illegal expression', function() {
-        expect(function() {
-            evalExp('1 contains "x"', scope);
-        }).to.throw();
-    });
+    it('should eval variables', function () {
+      expect(evalValue('23', scope)).to.equal(23)
+      expect(evalValue('one', scope)).to.equal(1)
+      expect(evalValue('x', scope)).to.equal('XXX')
+    })
 
-    it('should eval variables', function() {
-        expect(evalValue('23', scope)).to.equal(23);
-        expect(evalValue('one', scope)).to.equal(1);
-        expect(evalValue('x', scope)).to.equal('XXX');
-    });
+    it('should throw if not valid', function () {
+      var fn = () => evalValue('===')
+      expect(fn).to.throw("cannot eval '===' as value")
+    })
+  })
 
-    describe('.evalExp()', function() {
+  describe('.isTruthy()', function () {
+    // Spec: https://shopify.github.io/liquid/basics/truthy-and-falsy/
+    expect(isTruthy(true)).to.be.true
+    expect(isTruthy(false)).to.be.false
+    expect(isTruthy(null)).to.be.false
+    expect(isTruthy('foo')).to.be.true
+    expect(isTruthy('')).to.be.true
+    expect(isTruthy(0)).to.be.true
+    expect(isTruthy(1)).to.be.true
+    expect(isTruthy(1.1)).to.be.true
+    expect(isTruthy([1])).to.be.true
+    expect(isTruthy([])).to.be.true
+  })
 
-        it('should throw when scope undefined', function() {
-            expect(function() {
-                evalExp('');
-            }).to.throw(/scope undefined/);
-        });
+  describe('.evalExp()', function () {
+    it('should throw when scope undefined', function () {
+      expect(function () {
+        evalExp('')
+      }).to.throw(/scope undefined/)
+    })
 
-        it('should eval simple expression', function() {
-            expect(evalExp('1<2', scope)).to.equal(true);
-            expect(evalExp('2<=2', scope)).to.equal(true);
-            expect(evalExp('one<=two', scope)).to.equal(true);
-            expect(evalExp('x contains "x"', scope)).to.equal(false);
-            expect(evalExp('x contains "X"', scope)).to.equal(true);
-            expect(evalExp('"<=" == "<="', scope)).to.equal(true);
-        });
+    it('should eval simple expression', function () {
+      expect(evalExp('1<2', scope)).to.equal(true)
+      expect(evalExp('2<=2', scope)).to.equal(true)
+      expect(evalExp('one<=two', scope)).to.equal(true)
+      expect(evalExp('x contains "x"', scope)).to.equal(false)
+      expect(evalExp('x contains "X"', scope)).to.equal(true)
+      expect(evalExp('1 contains "x"', scope)).to.equal(false)
+      expect(evalExp('y contains "x"', scope)).to.equal(false)
+      expect(evalExp('z contains "x"', scope)).to.equal(false)
+      expect(evalExp('(1..5) contains 3', scope)).to.equal(true)
+      expect(evalExp('(1..5) contains 6', scope)).to.equal(false)
+      expect(evalExp('"<=" == "<="', scope)).to.equal(true)
+    })
 
-        it('should eval complex expression', function() {
-            expect(evalExp('1<2 and x contains "x"', scope)).to.equal(false);
-            expect(evalExp('1<2 or x contains "x"', scope)).to.equal(true);
-            expect(evalExp('false or true', scope)).to.equal(true);
-        });
+    it('should eval complex expression', function () {
+      expect(evalExp('1<2 and x contains "x"', scope)).to.equal(false)
+      expect(evalExp('1<2 or x contains "x"', scope)).to.equal(true)
+      expect(evalExp('false or true', scope)).to.equal(true)
+    })
 
-        it("should eval range expression", function() {
-            expect(evalExp('(2..4)', scope)).to.deep.equal([2, 3, 4]);
-            expect(evalExp('(two..4)', scope)).to.deep.equal([2, 3, 4]);
-        });
-    });
-});
+    it('should eval range expression', function () {
+      expect(evalExp('(2..4)', scope)).to.deep.equal([2, 3, 4])
+      expect(evalExp('(two..4)', scope)).to.deep.equal([2, 3, 4])
+    })
+  })
+})

test/tag.js

@@ -1,73 +1,98 @@
-const chai = require("chai");
-const sinon = require("sinon");
-const expect = chai.expect;
-chai.use(require("sinon-chai"));
+const chai = require('chai')
+const sinon = require('sinon')
+const expect = chai.expect
+chai.use(require('sinon-chai'))
 
-var tag = require('../src/tag.js')();
-var Scope = require('../src/scope.js');
+var tag = require('../src/tag.js')()
+var Scope = require('../src/scope.js')
 
-describe('tag', function() {
-    var scope;
-    before(function() {
-        scope = Scope.factory({
-            foo: 'bar',
-            arr: [2, 1]
-        });
-        tag.clear();
-    });
+describe('tag', function () {
+  var scope
+  before(function () {
+    scope = Scope.factory({
+      foo: 'bar',
+      arr: [2, 1],
+      bar: {
+        coo: 'uoo'
+      }
+    })
+    tag.clear()
+  })
 
-    it('should throw when not registered', function() {
-        expect(function() {
-            tag.construct({
-                type: 'tag',
-                value: 'foo',
-                name: 'foo'
-            }, []);
-        }).to.throw(/tag foo not found/);
-    });
+  it('should throw when not registered', function () {
+    expect(function () {
+      tag.construct({
+        type: 'tag',
+        value: 'foo',
+        name: 'foo'
+      }, [])
+    }).to.throw(/tag foo not found/)
+  })
 
-    it('should register simple tag', function() {
-        expect(
-            function() {
-                tag.register('foo', {
-                    render: x => 'bar'
-                });
-            }).not.throw();
-    });
+  it('should register simple tag', function () {
+    expect(function () {
+      tag.register('foo', {
+        render: x => 'bar'
+      })
+    }).not.throw()
+  })
 
-    it('should call tag.render', function() {
-        var spy = sinon.spy(),
-            tokens = [];
-        tag.register('foo', {
-            render: spy
-        });
-        return tag
-            .construct({
-                type: 'tag',
-                value: 'foo',
-                name: 'foo'
-            }, [])
-            .render(scope, {})
-            .then(() => expect(spy).to.have.been.called);
-    });
+  it('should call tag.render', function () {
+    var spy = sinon.spy()
+    tag.register('foo', {
+      render: spy
+    })
+    return tag
+      .construct({
+        type: 'tag',
+        value: 'foo',
+        name: 'foo'
+      }, [])
+      .render(scope, {})
+      .then(() => expect(spy).to.have.been.called)
+  })
 
-    it('should call tag.render with resolved hash', function() {
-        var spy = sinon.spy(),
-            tokens = [];
-        tag.register('foo', {
-            render: spy
-        });
-        var token = {
-            type: 'tag',
-            value: 'foo aa:foo bb: arr[0] cc: 2.3',
-            name: 'foo',
-            args: 'aa:foo bb: arr[0] cc: 2.3'
-        };
-        return tag.construct(token, []).render(scope, {})
-            .then(() => expect(spy).to.have.been.calledWithMatch(scope, {
-                aa: 'bar',
-                bb: 2,
-                cc: 2.3
-            }));
-    });
-});
+  describe('hash', function () {
+    var spy, token
+    beforeEach(function () {
+      spy = sinon.spy()
+      tag.register('foo', {
+        render: spy
+      })
+      token = {
+        type: 'tag',
+        value: 'foo aa:foo bb: arr[0] cc: 2.3\ndd:bar.coo',
+        name: 'foo',
+        args: 'aa:foo bb: arr[0] cc: 2.3\ndd:bar.coo'
+      }
+    })
+    it('should call tag.render with scope', function () {
+      return tag.construct(token, []).render(scope, {})
+        .then(() => expect(spy).to.have.been.calledWithMatch(scope))
+    })
+    it('should resolve identifier hash', function () {
+      return tag.construct(token, []).render(scope, {})
+        .then(() => expect(spy).to.have.been.calledWithMatch({}, {
+          aa: 'bar'
+        }))
+    })
+    it('should accept space between key/value', function () {
+      return tag.construct(token, []).render(scope, {})
+        .then(() => expect(spy).to.have.been.calledWithMatch({}, {
+          bb: 2
+        }))
+    })
+    it('should resolve number value hash', function () {
+      return tag.construct(token, []).render(scope, {})
+        .then(() => expect(spy).to.have.been.calledWithMatch(scope, {
+          cc: 2.3
+        }))
+    })
+    it('should resolve property access hash', function () {
+      return tag.construct(token, []).render(scope, {})
+        .then(() => expect(spy).to.have.been.calledWithMatch(scope, {
+          dd: 'uoo'
+        }))
+    })
+  })
+})

test/tags/assign.js

@@ -1,53 +1,53 @@
-const Liquid = require('../..');
-const chai = require("chai");
-const expect = chai.expect;
-chai.use(require("chai-as-promised"));
+const Liquid = require('../..')
+const chai = require('chai')
+const expect = chai.expect
+chai.use(require('chai-as-promised'))
 
-describe('tags/assign', function() {
-    var liquid = Liquid();
-    it('should throw when variable expression illegal', function() {
-        var src = '{% assign / %}';
-        var ctx = {};
-        return expect(liquid.parseAndRender(src, ctx)).to.be.rejectedWith(/illegal/);
-    });
+describe('tags/assign', function () {
+  var liquid = Liquid()
+  it('should throw when variable expression illegal', function () {
+    var src = '{% assign / %}'
+    var ctx = {}
+    return expect(liquid.parseAndRender(src, ctx)).to.be.rejectedWith(/illegal/)
+  })
 
-    it('should assign as string', function() {
-        var src = '{% assign foo="bar" %}{{foo}}';
-        return expect(liquid.parseAndRender(src))
-            .to.eventually.equal('bar');
-    });
-    it('should assign as array', function() {
-        var src = '{% assign foo=(1..3) %}{{foo}}';
-        return expect(liquid.parseAndRender(src))
-            .to.eventually.equal('[1,2,3]');
-    });
-    it('should assign as filter result', function() {
-        var src = '{% assign foo="a b" | capitalize | split: " " | first %}{{foo}}';
-        return expect(liquid.parseAndRender(src))
-            .to.eventually.equal('A');
-    });
-    it('should assign var-1', function() {
-        var src = '{% assign var-1 = 5 %}{{ var-1 }}';
-        return expect(liquid.parseAndRender(src)).to.eventually.equal('5');
-    });
-    it('should assign var-', function() {
-        var src = '{% assign var- = 5 %}{{ var- }}';
-        return expect(liquid.parseAndRender(src)).to.eventually.equal('5');
-    });
-    it('should assign -var', function() {
-        var src = '{% assign -var = 5 %}{{ -var }}';
-        return expect(liquid.parseAndRender(src)).to.eventually.equal('5');
-    });
-    it('should assign -5-5', function() {
-        var src = '{% assign -5-5 = 5 %}{{ -5-5 }}';
-        return expect(liquid.parseAndRender(src)).to.eventually.equal('5');
-    });
-    it('should assign 4-3', function() {
-        var src = '{% assign 4-3 = 5 %}{{ 4-3 }}';
-        return expect(liquid.parseAndRender(src)).to.eventually.equal('5');
-    });
-    it('should not assign -6', function() {
-        var src = '{% assign -6 = 5 %}{{ -6 }}';
-        return expect(liquid.parseAndRender(src)).to.eventually.equal('-6');
-    });
-});
+  it('should assign as string', function () {
+    var src = '{% assign foo="bar" %}{{foo}}'
+    return expect(liquid.parseAndRender(src))
+      .to.eventually.equal('bar')
+  })
+  it('should assign as array', function () {
+    var src = '{% assign foo=(1..3) %}{{foo}}'
+    return expect(liquid.parseAndRender(src))
+      .to.eventually.equal('[1,2,3]')
+  })
+  it('should assign as filter result', function () {
+    var src = '{% assign foo="a b" | capitalize | split: " " | first %}{{foo}}'
+    return expect(liquid.parseAndRender(src))
+      .to.eventually.equal('A')
+  })
+  it('should assign var-1', function () {
+    var src = '{% assign var-1 = 5 %}{{ var-1 }}'
+    return expect(liquid.parseAndRender(src)).to.eventually.equal('5')
+  })
+  it('should assign var-', function () {
+    var src = '{% assign var- = 5 %}{{ var- }}'
+    return expect(liquid.parseAndRender(src)).to.eventually.equal('5')
+  })
+  it('should assign -var', function () {
+    var src = '{% assign -var = 5 %}{{ -var }}'
+    return expect(liquid.parseAndRender(src)).to.eventually.equal('5')
+  })
+  it('should assign -5-5', function () {
+    var src = '{% assign -5-5 = 5 %}{{ -5-5 }}'
+    return expect(liquid.parseAndRender(src)).to.eventually.equal('5')
+  })
+  it('should assign 4-3', function () {
+    var src = '{% assign 4-3 = 5 %}{{ 4-3 }}'
+    return expect(liquid.parseAndRender(src)).to.eventually.equal('5')
+  })
+  it('should not assign -6', function () {
+    var src = '{% assign -6 = 5 %}{{ -6 }}'
+    return expect(liquid.parseAndRender(src)).to.eventually.equal('-6')
+  })
+})

test/tags/capture.js

@@ -1,26 +1,26 @@
-const Liquid = require('../..');
-const chai = require("chai");
-const expect = chai.expect;
-chai.use(require("chai-as-promised"));
+const Liquid = require('../..')
+const chai = require('chai')
+const expect = chai.expect
+chai.use(require('chai-as-promised'))
 
-describe('tags/capture', function() {
-    var liquid = Liquid();
+describe('tags/capture', function () {
+  var liquid = Liquid()
 
-    it('should support capture', function() {
-        var src = '{% capture f %}{{"a" | capitalize}}{%endcapture%}{{f}}';
-        return expect(liquid.parseAndRender(src))
-            .to.eventually.equal('A');
-    });
+  it('should support capture', function () {
+    var src = '{% capture f %}{{"a" | capitalize}}{%endcapture%}{{f}}'
+    return expect(liquid.parseAndRender(src))
+      .to.eventually.equal('A')
+  })
 
-    it('should throw on invalid identifier', function() {
-        var src = '{% capture = %}{%endcapture%}';
-        return expect(liquid.parseAndRender(src))
-            .to.be.rejectedWith(/= not valid identifier/);
-    });
+  it('should throw on invalid identifier', function () {
+    var src = '{% capture = %}{%endcapture%}'
+    return expect(liquid.parseAndRender(src))
+      .to.be.rejectedWith(/= not valid identifier/)
+  })
 
-    it('should throw when capture not closed', function() {
-        var src = '{%capture c%}{{c}}';
-        return expect(liquid.parseAndRender(src))
-            .to.be.rejectedWith(/tag .* not closed/);
-    });
-});
+  it('should throw when capture not closed', function () {
+    var src = '{%capture c%}{{c}}'
+    return expect(liquid.parseAndRender(src))
+      .to.be.rejectedWith(/tag .* not closed/)
+  })
+})

test/tags/case.js

@@ -1,45 +1,52 @@
-const Liquid = require('../..');
-const chai = require("chai");
-const expect = chai.expect;
-chai.use(require("chai-as-promised"));
+const Liquid = require('../..')
+const chai = require('chai')
+const expect = chai.expect
+chai.use(require('chai-as-promised'))
 
-describe('tags/case', function() {
-    var liquid = Liquid();
+describe('tags/case', function () {
+  var liquid = Liquid()
 
-    it('should support case 1', function() {
-        var src = '{% case "foo"%}';
-        return expect(liquid.parseAndRender(src))
-            .to.be.rejectedWith(/{% case "foo"%} not closed/);
-    });
-    it('should support case 2', function() {
-        var src = '{% case "foo"%}' +
+  it('should reject if not closed', function () {
+    var src = '{% case "foo"%}'
+    return expect(liquid.parseAndRender(src))
+      .to.be.rejectedWith(/{% case "foo"%} not closed/)
+  })
+  it('should hit the specified case', function () {
+    var src = '{% case "foo"%}' +
             '{% when "foo" %}foo{% when "bar"%}bar' +
-            '{%endcase%}';
-        return expect(liquid.parseAndRender(src))
-            .to.eventually.equal('foo');
-    });
-    it('should support case 3', function() {
-        var src = '{% case empty %}' +
+            '{%endcase%}'
+    return expect(liquid.parseAndRender(src))
+      .to.eventually.equal('foo')
+  })
+  it('should resolve empty string if not hit', function () {
+    var src = '{% case empty %}' +
             '{% when "foo" %}foo{% when ""%}bar' +
-            '{%endcase%}';
-        var ctx = {
-            empty: ''
-        };
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('bar');
-    });
-    it('should support case 4', function() {
-        var src = '{% case false %}' +
+            '{%endcase%}'
+    var ctx = {
+      empty: ''
+    }
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('bar')
+  })
+  it('should accept empty string as branch name', function () {
+    var src = '{% case false %}' +
             '{% when "foo" %}foo{% when ""%}bar' +
-            '{%endcase%}';
-        return expect(liquid.parseAndRender(src))
-            .to.eventually.equal('');
-    });
-    it('should support case 5', function() {
-        var src = '{% case "a" %}' +
+            '{%endcase%}'
+    return expect(liquid.parseAndRender(src))
+      .to.eventually.equal('')
+  })
+  it('should support boolean case', function () {
+    var src = '{% case false %}' +
+            '{% when "foo" %}foo{% when false%}bar' +
+            '{%endcase%}'
+    return expect(liquid.parseAndRender(src))
+      .to.eventually.equal('bar')
+  })
+  it('should support else branch', function () {
+    var src = '{% case "a" %}' +
             '{% when "b" %}b{% when "c"%}c{%else %}d' +
-            '{%endcase%}';
-        return expect(liquid.parseAndRender(src))
-            .to.eventually.equal('d');
-    });
-});
+            '{%endcase%}'
+    return expect(liquid.parseAndRender(src))
+      .to.eventually.equal('d')
+  })
+})

test/tags/comment.js

@@ -1,23 +1,23 @@
-const Liquid = require('../..');
-const chai = require("chai");
-const expect = chai.expect;
-chai.use(require("chai-as-promised"));
+const Liquid = require('../..')
+const chai = require('chai')
+const expect = chai.expect
+chai.use(require('chai-as-promised'))
 
-describe('tags/comment', function() {
-    var liquid = Liquid();
-    it('should support comment 1', function() {
-        var src = '{% comment %}{% raw%}';
-        return expect(liquid.parseAndRender(src))
-            .to.be.rejectedWith(/{% comment %} not closed/);
-    });
-    it('should support comment 2', function() {
-        var src = 'My name is {% comment %}super{% endcomment %} Shopify.';
-        return expect(liquid.parseAndRender(src))
-            .to.eventually.equal('My name is  Shopify.');
-    });
-    it('should support comment 3', function() {
-        var src = '{% comment %}\n{{ foo}} \n{% endcomment %}';
-        return expect(liquid.parseAndRender(src))
-            .to.eventually.equal('');
-    });
-});
+describe('tags/comment', function () {
+  var liquid = Liquid()
+  it('should support comment 1', function () {
+    var src = '{% comment %}{% raw%}'
+    return expect(liquid.parseAndRender(src))
+      .to.be.rejectedWith(/{% comment %} not closed/)
+  })
+  it('should support comment 2', function () {
+    var src = 'My name is {% comment %}super{% endcomment %} Shopify.'
+    return expect(liquid.parseAndRender(src))
+      .to.eventually.equal('My name is  Shopify.')
+  })
+  it('should support comment 3', function () {
+    var src = '{% comment %}\n{{ foo}} \n{% endcomment %}'
+    return expect(liquid.parseAndRender(src))
+      .to.eventually.equal('')
+  })
+})

test/tags/cycle.js

@@ -1,39 +1,39 @@
-const Liquid = require('../..');
-const chai = require("chai");
-const expect = chai.expect;
-chai.use(require("chai-as-promised"));
+const Liquid = require('../..')
+const chai = require('chai')
+const expect = chai.expect
+chai.use(require('chai-as-promised'))
 
-describe('tags/cycle', function() {
-    var liquid = Liquid();
+describe('tags/cycle', function () {
+  var liquid = Liquid()
 
-    it('should support cycle', function() {
-        var src = "{% cycle '1', '2', '3' %}";
-        return expect(liquid.parseAndRender(src + src + src + src))
-            .to.eventually.equal('1231');
-    });
+  it('should support cycle', function () {
+    var src = "{% cycle '1', '2', '3' %}"
+    return expect(liquid.parseAndRender(src + src + src + src))
+      .to.eventually.equal('1231')
+  })
 
-    it('should throw when cycle candidates empty', function() {
-        return expect(liquid.parseAndRender('{%cycle%}'))
-            .to.be.rejectedWith(/empty candidates/);
-    });
+  it('should throw when cycle candidates empty', function () {
+    return expect(liquid.parseAndRender('{%cycle%}'))
+      .to.be.rejectedWith(/empty candidates/)
+  })
 
-    it('should support cycle in for block', function() {
-        var src = '{% for i in (1..5) %}{% cycle one, "e"%}{% endfor %}';
-        var ctx = {
-            one: 1
-        };
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('1e1e1');
-    });
+  it('should support cycle in for block', function () {
+    var src = '{% for i in (1..5) %}{% cycle one, "e"%}{% endfor %}'
+    var ctx = {
+      one: 1
+    }
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('1e1e1')
+  })
 
-    it('should support cycle group', function() {
-        var src = "{% cycle one: '1', '2', '3'%}" +
+  it('should support cycle group', function () {
+    var src = "{% cycle one: '1', '2', '3'%}" +
             "{% cycle 1: '1', '2', '3'%}" +
-            "{% cycle 2: '1', '2', '3'%}";
-        var ctx = {
-            one: 1
-        };
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('121');
-    });
-});
+            "{% cycle 2: '1', '2', '3'%}"
+    var ctx = {
+      one: 1
+    }
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('121')
+  })
+})

test/tags/decrement.js

@@ -1,38 +1,38 @@
-const Liquid = require('../..');
-const chai = require("chai");
-const expect = chai.expect;
-chai.use(require("chai-as-promised"));
+const Liquid = require('../..')
+const chai = require('chai')
+const expect = chai.expect
+chai.use(require('chai-as-promised'))
 
-describe('tags/decrement', function() {
-    var liquid = Liquid();
+describe('tags/decrement', function () {
+  var liquid = Liquid()
 
-    it('should throw when variable expression illegal', function() {
-        var src = '{% decrement / %}{{one}}';
-        var ctx = {};
-        return expect(liquid.parseAndRender(src, ctx)).to.be.rejectedWith(/illegal/);
-    });
+  it('should throw when variable expression illegal', function () {
+    var src = '{% decrement / %}{{one}}'
+    var ctx = {}
+    return expect(liquid.parseAndRender(src, ctx)).to.be.rejectedWith(/illegal/)
+  })
 
-    it('should support decrement', function() {
-        var src = '{% decrement one %}{{one}}';
-        var ctx = {
-            one: 1
-        };
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('0');
-    });
+  it('should support decrement', function () {
+    var src = '{% decrement one %}{{one}}'
+    var ctx = {
+      one: 1
+    }
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('0')
+  })
 
-    it('should decrement undefined', function() {
-        var src = '{% decrement empty %}{{empty}}';
-        return expect(liquid.parseAndRender(src))
-            .to.eventually.equal('-1');
-    });
+  it('should decrement undefined', function () {
+    var src = '{% decrement empty %}{{empty}}'
+    return expect(liquid.parseAndRender(src))
+      .to.eventually.equal('-1')
+  })
 
-    it('should support decrement multiple times', function() {
-        var src = '{% decrement foo %}{%decrement foo%}{{foo}}';
-        var ctx = {
-            foo: 1
-        };
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('-1');
-    });
-});
+  it('should support decrement multiple times', function () {
+    var src = '{% decrement foo %}{%decrement foo%}{{foo}}'
+    var ctx = {
+      foo: 1
+    }
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('-1')
+  })
+})

test/tags/for.js

@@ -1,82 +1,164 @@
-const Liquid = require('../..');
-const chai = require("chai");
-const expect = chai.expect;
-chai.use(require("chai-as-promised"));
+const Liquid = require('../..')
+const chai = require('chai')
+const expect = chai.expect
+chai.use(require('chai-as-promised'))
 
-describe('tags/for', function() {
-    var liquid, ctx;
-    before(function() {
-        liquid = Liquid();
-        ctx = {
-            one: 1,
-            alpha: ['a', 'b', 'c'],
-        };
-    });
-    it('should support for', function() {
-        var src = '{%for c in alpha%}{{c}}{%endfor%}';
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('abc');
-    });
+describe('tags/for', function () {
+  var liquid, ctx
+  before(function () {
+    liquid = Liquid()
+    liquid.registerTag('throwingTag', {
+      render: function () { throw new Error('intended render error') }
+    })
+    ctx = {
+      one: 1,
+      // eslint-disable-next-line
+      strObj: new String(''),
+      emptyObj: {},
+      nullProtoObj: Object.create(null),
+      obj: {foo: 'bar', coo: 'haa'},
+      alpha: ['a', 'b', 'c'],
+      emptyArray: []
+    }
+  })
+  it('should support array', function () {
+    var src = '{%for c in alpha%}{{c}}{%endfor%}'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('abc')
+  })
 
-    it('should throw when for not closed', function() {
-        var src = '{%for c in alpha%}{{c}}';
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.be.rejectedWith(/tag .* not closed/);
-    });
+  it('should support object', function () {
+    var src = '{%for item in obj%}{{item[0]}},{{item[1]}}-{%else%}b{%endfor%}'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('foo,bar-coo,haa-')
+  })
 
-    it('should support for else', function() {
-        var src = '{%for c in ""%}a{%else%}b{%endfor%}';
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('b');
-    });
+  describe('scope', function () {
+    it('should read super scope', function () {
+      var src = '{%for a in (1..2)%}{{num}}{%endfor%}'
+      return expect(liquid.parseAndRender(src, {num: 1}))
+        .to.eventually.equal('11')
+    })
+    it('should write super scope', function () {
+      var src = '{%for a in (1..2)%}{{num}}{%assign num = 2%}{%endfor%}'
+      return expect(liquid.parseAndRender(src, {num: 1}))
+        .to.eventually.equal('12')
+    })
+  })
 
-    it('should support for with forloop', function() {
-        var src = '{%for c in alpha%}' +
+  describe('illegal', function () {
+    it('should reject when for not closed', function () {
+      var src = '{%for c in alpha%}{{c}}'
+      return expect(liquid.parseAndRender(src, ctx))
+        .to.be.rejectedWith(/tag .* not closed/)
+    })
+
+    it('should reject when inner templates rejected', function () {
+      var src = '{%for c in alpha%}{%throwingTag%}{%endfor%}'
+      return expect(liquid.parseAndRender(src, ctx))
+        .to.be.rejectedWith(/intended render error/)
+    })
+  })
+
+  describe('else', function () {
+    it('should goto else for empty array', function () {
+      var src = '{%for c in emptyArray%}a{%else%}b{%endfor%}'
+      return expect(liquid.parseAndRender(src, ctx))
+        .to.eventually.equal('b')
+    })
+
+    it('should treat non-empty string as one single element', function () {
+      var src = '{%for c in "abc"%}x{{c}}{%else%}y{%endfor%}'
+      return expect(liquid.parseAndRender(src, ctx))
+        .to.eventually.equal('xabc')
+    })
+
+    it('should goto else for empty string', function () {
+      var src = '{%for c in ""%}a{%else%}b{%endfor%}'
+      return expect(liquid.parseAndRender(src, ctx))
+        .to.eventually.equal('b')
+    })
+
+    it('should goto else for empty string object', function () {
+      // it should be false although `new String` is none-conform
+      var src = '{%for c in strObj%}a{%else%}b{%endfor%}'
+      return expect(liquid.parseAndRender(src, ctx))
+        .to.eventually.equal('b')
+    })
+
+    it('should goto else for empty object', function () {
+      var src = '{%for c in emptyObj%}a{%else%}b{%endfor%}'
+      return expect(liquid.parseAndRender(src, ctx))
+        .to.eventually.equal('b')
+    })
+
+    it('should goto else for null-prototyped object', function () {
+      var src = '{%for c in nullProtoObj%}a{%else%}b{%endfor%}'
+      return expect(liquid.parseAndRender(src, ctx))
+        .to.eventually.equal('b')
+    })
+  })
+
+  it('should support for with forloop', function () {
+    var src = '{%for c in alpha%}' +
             '{{forloop.first}}.{{forloop.index}}.{{forloop.index0}}.' +
             '{{forloop.last}}.{{forloop.length}}.' +
             '{{forloop.rindex}}.{{forloop.rindex0}}' +
             '{{c}}\n' +
-            '{%endfor%}';
-        var dst = 'true.1.0.false.3.3.2a\n' +
+            '{%endfor%}'
+    var dst = 'true.1.0.false.3.3.2a\n' +
             'false.2.1.false.3.2.1b\n' +
-            'false.3.2.true.3.1.0c\n';
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal(dst);
-    });
+            'false.3.2.true.3.1.0c\n'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal(dst)
+  })
 
-    it('should support for with continue', function() {
-        var src = '{% for i in (1..5) %}' +
+  it('should support for with continue', function () {
+    var src = '{% for i in (1..5) %}' +
             '{{i}}{% continue %}after' +
-            '{% endfor %}';
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('12345');
-    });
-    it('should support for with break', function() {
-        var src = '{% for i in (one..5) %}' +
-            '{% if i == 4 %}{% break %}{% endif %}' +
-            '{{ i }}' +
-            '{% endfor %}';
-        //return liquid.parseAndRender(src, ctx).catch(e => {
-            //console.log(e.stack);
-        //});
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('123');
-    });
+            '{% endfor %}'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('12345')
+  })
+  it('should support for with break', function () {
+    var src = '{% for i in (one..5) %}' +
+      '{% if i == 4 %}{% break %}{% endif %}' +
+      '{{ i }}' +
+      '{% endfor %}'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('123')
+  })
 
-    it('should support for with limit', function() {
-        var src = '{% for i in (1..5) limit:2 %}{{ i }}{% endfor %}';
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('12');
-    });
-    it('should support for with limit and offset', function() {
-        var src = '{% for i in (1..10) limit:2 offset:5%}{{ i }}{% endfor %}';
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('67');
-    });
+  describe('limit', function () {
+    it('should support for with limit', function () {
+      var src = '{% for i in (1..5) limit:2 %}{{ i }}{% endfor %}'
+      return expect(liquid.parseAndRender(src, ctx))
+        .to.eventually.equal('12')
+    })
+    it('should support for with limit and offset', function () {
+      var src = '{% for i in (1..10) limit:2 offset:5%}{{ i }}{% endfor %}'
+      return expect(liquid.parseAndRender(src, ctx))
+        .to.eventually.equal('67')
+    })
+  })
 
-    it('should support for reversed', function() {
-        var src = '{% for i in (1..5) limit:2 reversed %}{{ i }}{% endfor %}';
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('21');
-    });
-});
+  describe('reverse', function () {
+    it('should support for reversed in the last position', function () {
+      var src = '{% for i in (1..5) limit:2 reversed %}{{ i }}{% endfor %}'
+      return expect(liquid.parseAndRender(src, ctx))
+        .to.eventually.equal('21')
+    })
+
+    it('should support for reversed in the first position', function () {
+      var src = '{% for i in (1..5) reversed limit:2 %}{{ i }}{% endfor %}'
+      return expect(liquid.parseAndRender(src, ctx))
+        .to.eventually.equal('21')
+    })
+
+    it('should support for reversed in the middle position', function () {
+      var src = '{% for i in (1..5) offset:2 reversed limit:4 %}{{ i }}{% endfor %}'
+      return expect(liquid.parseAndRender(src, ctx))
+        .to.eventually.equal('543')
+    })
+  })
+})

test/tags/if.js

@@ -1,49 +1,103 @@
-const Liquid = require('../..');
-const chai = require("chai");
-const expect = chai.expect;
-chai.use(require("chai-as-promised"));
+const Liquid = require('../..')
+const chai = require('chai')
+const expect = chai.expect
+chai.use(require('chai-as-promised'))
 
-describe('tags/if', function() {
-    var liquid = Liquid();
-    var ctx = {
-        one: 1,
-        two: 2,
-        emptyArray: []
-    };
+describe('tags/if', function () {
+  var liquid = Liquid()
+  var ctx = {
+    one: 1,
+    two: 2,
+    emptyString: '',
+    emptyArray: []
+  }
 
-    it('should support if 1', function() {
-        var src = '{% if false%}yes';
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.be.rejectedWith(/tag {% if false%} not closed/);
-    });
-    it('should support if 2', function() {
-        var src = '{%if emptyArray%}a{%endif%}';
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('');
-    });
-    it('should support if 3', function() {
-        var src = '{% if 2==3 %}yes{%else%}no{%endif%}';
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('no');
-    });
-    it('should support if 4', function() {
-        var src = '{% if 1>=2 and one<two %}a{%endif%}';
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('');
-    });
-    it('should support if 5', function() {
-        var src = '{% if one!=two %}yes{%else%}no{%endif%}';
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('yes');
-    });
-    it('should support if 6', function() {
-        var src = '{% if false %}1{%elsif true%}2{%else%}3{%endif%}';
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('2');
-    });
-    it('should support if 7', function() {
-        var src = '{%if false%}{%if true%}{%else%}a{%endif%}{%endif%}';
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('');
-    });
-});
+  it('should support if 1', function () {
+    var src = '{% if false%}yes'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.be.rejectedWith(/tag {% if false%} not closed/)
+  })
+  it('should support if 2', function () {
+    var src = '{%if emptyArray%}a{%endif%}'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('a')
+  })
+  it('should support if 3', function () {
+    var src = '{% if 2==3 %}yes{%else%}no{%endif%}'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('no')
+  })
+  it('should support if 4', function () {
+    var src = '{% if 1>=2 and one<two %}a{%endif%}'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('')
+  })
+  it('should support if 5', function () {
+    var src = '{% if one!=two %}yes{%else%}no{%endif%}'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('yes')
+  })
+  it('should support if 6', function () {
+    var src = '{% if false %}1{%elsif true%}2{%else%}3{%endif%}'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('2')
+  })
+  it('should support if 7', function () {
+    var src = '{%if false%}{%if true%}{%else%}a{%endif%}{%endif%}'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('')
+  })
+  it('should return true if empty string', function () {
+    var src = '{%if emptyString%}a{%endif%}'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('a')
+  })
+
+  it('should return else when comparison on null 1', function () {
+    var src = '{% if null < 10 %}yes{% else %}no{% endif %}'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('no')
+  })
+
+  it('should return else when comparison on null 2', function () {
+    var src = '{% if null <= 10 %}yes{% else %}no{% endif %}'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('no')
+  })
+
+  it('should return else when comparison on null 3', function () {
+    var src = '{% if null >= 10 %}yes{% else %}no{% endif %}'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('no')
+  })
+
+  it('should return else when comparison on null 4', function () {
+    var src = '{% if null > 10 %}yes{% else %}no{% endif %}'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('no')
+  })
+
+  it('should return else when comparison on null 5', function () {
+    var src = '{% if 10 < null %}yes{% else %}no{% endif %}'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('no')
+  })
+
+  it('should return else when comparison on null 6', function () {
+    var src = '{% if 10 <= null %}yes{% else %}no{% endif %}'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('no')
+  })
+
+  it('should return else when comparison on null 7', function () {
+    var src = '{% if 10 >= null %}yes{% else %}no{% endif %}'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('no')
+  })
+
+  it('should return else when comparison on null 8', function () {
+    var src = '{% if 10 > null %}yes{% else %}no{% endif %}'
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('no')
+  })
+})

test/tags/include.js

@@ -1,92 +1,91 @@
-const Liquid = require('../..');
-const mock = require('mock-fs');
-const chai = require("chai");
-const expect = chai.expect;
-const ParseError = Liquid.Types.ParseError;
-chai.use(require("chai-as-promised"));
+const Liquid = require('../..')
+const mock = require('mock-fs')
+const chai = require('chai')
+const expect = chai.expect
+chai.use(require('chai-as-promised'))
 
-describe('tags/include', function() {
-    var liquid;
-    before(function() {
-        liquid = Liquid({
-            root: '/',
-            extname: '.html'
-        });
-    });
-    afterEach(function() {
-        mock.restore();
-    });
-    it('should support include', function() {
-        mock({
-            '/current.html': 'bar{% include "bar/foo.html" %}bar',
-            '/bar/foo.html': 'foo'
-        });
-        return expect(liquid.renderFile('/current.html')).to.
-            eventually.equal('barfoobar');
-    });
+describe('tags/include', function () {
+  var liquid
+  before(function () {
+    liquid = Liquid({
+      root: '/',
+      extname: '.html'
+    })
+  })
+  afterEach(function () {
+    mock.restore()
+  })
+  it('should support include', function () {
+    mock({
+      '/current.html': 'bar{% include "bar/foo.html" %}bar',
+      '/bar/foo.html': 'foo'
+    })
+    return expect(liquid.renderFile('/current.html')).to
+      .eventually.equal('barfoobar')
+  })
 
-    it('should throw when illegal', function() {
-        mock({
-            '/illegal.html': '{%include%}',
-        });
-        return liquid.renderFile('/illegal.html').catch(function(e){
-            expect(e.name).to.equal('ParseError');
-            expect(e.message).to.match(/illegal token {%include%}/);
-        });
-    });
+  it('should throw when illegal', function () {
+    mock({
+      '/illegal.html': '{%include%}'
+    })
+    return liquid.renderFile('/illegal.html').catch(function (e) {
+      expect(e.name).to.equal('ParseError')
+      expect(e.message).to.match(/illegal token {%include%}/)
+    })
+  })
 
-    it('should support include with relative path', function() {
-        mock({
-            '/bar/foo.html': 'foo',
-            '/foo/relative.html': 'bar{% include "../bar/foo.html" %}bar',
-        });
-        return expect(liquid.renderFile('foo/relative.html')).to.
-            eventually.equal('barfoobar');
-    });
+  it('should support include with relative path', function () {
+    mock({
+      '/bar/foo.html': 'foo',
+      '/foo/relative.html': 'bar{% include "../bar/foo.html" %}bar'
+    })
+    return expect(liquid.renderFile('foo/relative.html')).to
+      .eventually.equal('barfoobar')
+  })
 
-    it('should support include: hash list', function() {
-        mock({
-            '/hash.html': '{% assign name="harttle" %}{% include "user.html", role: "admin", alias: name %}',
-            '/user.html': '{{name}} : {{role}} : {{alias}}',
-        });
-        return expect(liquid.renderFile('hash.html')).to.
-            eventually.equal('harttle : admin : harttle');
-    });
+  it('should support include: hash list', function () {
+    mock({
+      '/hash.html': '{% assign name="harttle" %}{% include "user.html", role: "admin", alias: name %}',
+      '/user.html': '{{name}} : {{role}} : {{alias}}'
+    })
+    return expect(liquid.renderFile('hash.html')).to
+      .eventually.equal('harttle : admin : harttle')
+  })
 
-    it('should support include: parent scope', function() {
-        mock({
-            '/scope.html': '{% assign shape="triangle" %}{% assign color="yellow" %}{% include "color.html" %}',
-            '/color.html': 'color:{{color}}, shape:{{shape}}',
-        });
-        return expect(liquid.renderFile('scope.html')).to.
-            eventually.equal('color:yellow, shape:triangle');
-    });
+  it('should support include: parent scope', function () {
+    mock({
+      '/scope.html': '{% assign shape="triangle" %}{% assign color="yellow" %}{% include "color.html" %}',
+      '/color.html': 'color:{{color}}, shape:{{shape}}'
+    })
+    return expect(liquid.renderFile('scope.html')).to
+      .eventually.equal('color:yellow, shape:triangle')
+  })
 
-    it('should support include: with', function() {
-        mock({
-            '/with.html': '{% include "color" with "red", shape: "rect" %}',
-            '/color.html': 'color:{{color}}, shape:{{shape}}',
-        });
-        return expect(liquid.renderFile('with.html')).to.
-            eventually.equal('color:red, shape:rect');
-    });
+  it('should support include: with', function () {
+    mock({
+      '/with.html': '{% include "color" with "red", shape: "rect" %}',
+      '/color.html': 'color:{{color}}, shape:{{shape}}'
+    })
+    return expect(liquid.renderFile('with.html')).to
+      .eventually.equal('color:red, shape:rect')
+  })
 
-    it('should support nested includes', function() {
-        mock({
-            '/personInfo.html': 'This is a person {% include "card.html" %}',
-            '/card.html': '<p>{{person.firstName}} {{person.lastName}}<br/>{% include "address" %}</p>',
-            '/address.html': 'City: {{person.address.city}}'
-        });
-        var ctx = {
-            person: {
-                firstName: 'Joe',
-                lastName: 'Shmoe',
-                address: {
-                    city: 'Dallas'
-                }
-            }
-        };
-        return expect(liquid.renderFile('personInfo.html', ctx)).to.
-            eventually.equal('This is a person <p>Joe Shmoe<br/>City: Dallas</p>');
-    });
-});
+  it('should support nested includes', function () {
+    mock({
+      '/personInfo.html': 'This is a person {% include "card.html" %}',
+      '/card.html': '<p>{{person.firstName}} {{person.lastName}}<br/>{% include "address" %}</p>',
+      '/address.html': 'City: {{person.address.city}}'
+    })
+    var ctx = {
+      person: {
+        firstName: 'Joe',
+        lastName: 'Shmoe',
+        address: {
+          city: 'Dallas'
+        }
+      }
+    }
+    return expect(liquid.renderFile('personInfo.html', ctx)).to
+      .eventually.equal('This is a person <p>Joe Shmoe<br/>City: Dallas</p>')
+  })
+})

test/tags/increment.js

@@ -1,32 +1,32 @@
-const Liquid = require('../..');
-const chai = require("chai");
-const expect = chai.expect;
-chai.use(require("chai-as-promised"));
+const Liquid = require('../..')
+const chai = require('chai')
+const expect = chai.expect
+chai.use(require('chai-as-promised'))
 
-describe('tags/increment', function() {
-    var liquid = Liquid();
+describe('tags/increment', function () {
+  var liquid = Liquid()
 
-    it('should support increment', function() {
-        var src = '{% increment one %}{{one}}';
-        var ctx = {
-            one: 1
-        };
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('2');
-    });
+  it('should support increment', function () {
+    var src = '{% increment one %}{{one}}'
+    var ctx = {
+      one: 1
+    }
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('2')
+  })
 
-    it('should increment undefined', function() {
-        var src = '{% increment empty %}{{empty}}';
-        return expect(liquid.parseAndRender(src))
-            .to.eventually.equal('1');
-    });
+  it('should increment undefined', function () {
+    var src = '{% increment empty %}{{empty}}'
+    return expect(liquid.parseAndRender(src))
+      .to.eventually.equal('1')
+  })
 
-    it('should support increment multiple times', function() {
-        var src = '{% increment foo %}{%increment foo%}{{foo}}';
-        var ctx = {
-            foo: 1
-        };
-        return expect(liquid.parseAndRender(src, ctx))
-            .to.eventually.equal('3');
-    });
-});
+  it('should support increment multiple times', function () {
+    var src = '{% increment foo %}{%increment foo%}{{foo}}'
+    var ctx = {
+      foo: 1
+    }
+    return expect(liquid.parseAndRender(src, ctx))
+      .to.eventually.equal('3')
+  })
+})

test/tags/layout.js

@@ -1,81 +1,89 @@
-const Liquid = require('../..');
-const mock = require('mock-fs');
-const chai = require("chai");
-const expect = chai.expect;
-chai.use(require("chai-as-promised"));
+const Liquid = require('../..')
+const mock = require('mock-fs')
+const chai = require('chai')
+const expect = chai.expect
+chai.use(require('chai-as-promised'))
 
-describe('tags/layout', function() {
-    var liquid;
-    before(function() {
-        liquid = Liquid({
-            root: '/',
-            extname: '.html'
-        });
-    });
-    afterEach(function() {
-        mock.restore();
-    });
+describe('tags/layout', function () {
+  var liquid
+  before(function () {
+    liquid = Liquid({
+      root: '/',
+      extname: '.html'
+    })
+  })
+  afterEach(function () {
+    mock.restore()
+  })
 
-    it('should throw when block not closed', function() {
-        mock({
-            '/parent.html': 'parent',
-        });
-        src = '{% layout "parent" %}{%block%}A';
-        return expect(liquid.parseAndRender(src)).to
-            .be.rejectedWith(/tag {%block%} not closed/);
-    });
-    it('should handle anonymous block', function() {
-        mock({
-            '/parent.html': 'X{%block%}{%endblock%}Y',
-        });
-        src = '{% layout "parent.html" %}{%block%}A{%endblock%}';
-        return expect(liquid.parseAndRender(src)).to
-            .eventually.equal('XAY');
-    });
-    it('should handle named blocks', function() {
-        mock({
-            '/parent.html': 'X{% block "a"%}{% endblock %}Y{% block b%}{%endblock%}Z',
-        });
-        src = '{% layout "parent.html" %}' +
-            '{%block a%}A{%endblock%}' +
-            '{%block b%}B{%endblock%}';
-        return expect(liquid.parseAndRender(src)).to
-            .eventually.equal('XAYBZ');
-    });
-    it('should support default block content', function() {
-        mock({
-            '/parent.html': 'X{% block "a"%}A{% endblock %}Y{% block b%}B{%endblock%}Z',
-        });
-        src = '{% layout "parent.html" %}{%block a%}a{%endblock%}';
-        return expect(liquid.parseAndRender(src)).to
-            .eventually.equal('XaYBZ');
-    });
-    it('should handle nested block', function() {
-        mock({
-            '/grand.html': 'X{%block a%}G{%endblock%}Y',
-            '/parent.html': '{%layout "grand" %}{%block a%}P{%endblock%}',
-            '/main.html': '{%layout "parent"%}{%block a%}A{%endblock%}'
-        })
-        return expect(liquid.renderFile('/main.html')).to
-            .eventually.equal('XAY');
-    });
-    it('should not bleed scope into included layout', function() {
-        mock({
-            '/parent.html': 'X{%block a%}{%endblock%}Y{%block b%}{%endblock%}Z',
-            '/main.html': '{%layout "parent"%}'+
-                '{%block a%}A{%endblock%}' + 
-                '{%block b%}I{%include "included"%}J{%endblock%}',
-            '/included.html': '{%layout "parent"%}{%block a%}a{%endblock%}'
-        })
-        return expect(liquid.renderFile('main')).to
-            .eventually.equal('XAYIXaYZJZ');
-    });
-    it('should support hash list', function() {
-        mock({
-            '/parent.html': '{{color}}{%block%}{%endblock%}',
-            '/main.html': '{% layout "parent.html" color:"black"%}{%block%}A{%endblock%}'
-        });
-        return expect(liquid.renderFile('/main.html')).to.
-            eventually.equal('blackA');
-    });
-});
+  it('should throw when block not closed', function () {
+    mock({
+      '/parent.html': 'parent'
+    })
+    var src = '{% layout "parent" %}{%block%}A'
+    return expect(liquid.parseAndRender(src)).to
+      .be.rejectedWith(/tag {%block%} not closed/)
+  })
+  it('should handle anonymous block', function () {
+    mock({
+      '/parent.html': 'X{%block%}{%endblock%}Y'
+    })
+    var src = '{% layout "parent.html" %}{%block%}A{%endblock%}'
+    return expect(liquid.parseAndRender(src)).to
+      .eventually.equal('XAY')
+  })
+  it('should handle named blocks', function () {
+    mock({
+      '/parent.html': 'X{% block "a"%}{% endblock %}Y{% block b%}{%endblock%}Z'
+    })
+    var src = '{% layout "parent.html" %}' +
+      '{%block a%}A{%endblock%}' +
+      '{%block b%}B{%endblock%}'
+    return expect(liquid.parseAndRender(src)).to
+      .eventually.equal('XAYBZ')
+  })
+  it('should support default block content', function () {
+    mock({
+      '/parent.html': 'X{% block "a"%}A{% endblock %}Y{% block b%}B{%endblock%}Z'
+    })
+    var src = '{% layout "parent.html" %}{%block a%}a{%endblock%}'
+    return expect(liquid.parseAndRender(src)).to
+      .eventually.equal('XaYBZ')
+  })
+  it('should handle nested block', function () {
+    mock({
+      '/grand.html': 'X{%block a%}G{%endblock%}Y',
+      '/parent.html': '{%layout "grand" %}{%block a%}P{%endblock%}',
+      '/main.html': '{%layout "parent"%}{%block a%}A{%endblock%}'
+    })
+    return expect(liquid.renderFile('/main.html')).to
+      .eventually.equal('XAY')
+  })
+  it('should not bleed scope into included layout', function () {
+    mock({
+      '/parent.html': 'X{%block a%}{%endblock%}Y{%block b%}{%endblock%}Z',
+      '/main.html': '{%layout "parent"%}' +
+        '{%block a%}A{%endblock%}' +
+        '{%block b%}I{%include "included"%}J{%endblock%}',
+      '/included.html': '{%layout "parent"%}{%block a%}a{%endblock%}'
+    })
+    return expect(liquid.renderFile('main')).to
+      .eventually.equal('XAYIXaYZJZ')
+  })
+  it('should support hash list', function () {
+    mock({
+      '/parent.html': '{{color}}{%block%}{%endblock%}',
+      '/main.html': '{% layout "parent.html" color:"black"%}{%block%}A{%endblock%}'
+    })
+    return expect(liquid.renderFile('/main.html')).to
+      .eventually.equal('blackA')
+  })
+  it('should support multiple hash', function () {
+    mock({
+      '/parent.html': '{{color}}{{bg}}{%block%}{%endblock%}',
+      '/main.html': '{% layout "parent.html" color:"black", bg:"red"%}{%block%}A{%endblock%}'
+    })
+    return expect(liquid.renderFile('/main.html')).to
+      .eventually.equal('blackredA')
+  })
+})

test/tags/raw.js

@@ -1,24 +1,24 @@
-const Liquid = require('../..');
-const chai = require("chai");
-const expect = chai.expect;
-chai.use(require("chai-as-promised"));
+const Liquid = require('../..')
+const chai = require('chai')
+const expect = chai.expect
+chai.use(require('chai-as-promised'))
 
-describe('tags/raw', function() {
-    var liquid = Liquid();
-    it('should support raw 1', function() {
-        return expect(liquid.parseAndRender('{% raw%}'))
-            .to.be.rejectedWith(/{% raw%} not closed/);
-    });
-    it('should support raw 2', function() {
-        var src = '{% raw %}{{ 5 | plus: 6 }}{% endraw %} is equal to 11.';
-        var dst = '{{ 5 | plus: 6 }} is equal to 11.';
-        return expect(liquid.parseAndRender(src))
-            .to.eventually.equal(dst);
-    });
-    it('should support raw 3', function() {
-        var src = '{% raw %}\n{{ foo}} \n{% endraw %}';
-        var dst = '\n{{ foo}} \n';
-        return expect(liquid.parseAndRender(src))
-            .to.eventually.equal(dst);
-    });
-});
+describe('tags/raw', function () {
+  var liquid = Liquid()
+  it('should support raw 1', function () {
+    return expect(liquid.parseAndRender('{% raw%}'))
+      .to.be.rejectedWith(/{% raw%} not closed/)
+  })
+  it('should support raw 2', function () {
+    var src = '{% raw %}{{ 5 | plus: 6 }}{% endraw %} is equal to 11.'
+    var dst = '{{ 5 | plus: 6 }} is equal to 11.'
+    return expect(liquid.parseAndRender(src))
+      .to.eventually.equal(dst)
+  })
+  it('should support raw 3', function () {
+    var src = '{% raw %}\n{{ foo}} \n{% endraw %}'
+    var dst = '\n{{ foo}} \n'
+    return expect(liquid.parseAndRender(src))
+      .to.eventually.equal(dst)
+  })
+})

test/tags/tablerow.js

@@ -1,70 +1,76 @@
-const Liquid = require('../..');
-const chai = require("chai");
-const expect = chai.expect;
-chai.use(require("chai-as-promised"));
+const Liquid = require('../..')
+const chai = require('chai')
+const expect = chai.expect
+chai.use(require('chai-as-promised'))
 
-describe('tags/tablerow', function() {
-    var liquid = Liquid();
+describe('tags/tablerow', function () {
+  var liquid = Liquid()
 
-    it('should support tablerow', function() {
-        var src = '{% tablerow i in alpha cols:2 %}{{ i }}{% endtablerow %}';
-        var ctx = {
-            alpha: ['a', 'b', 'c']
-        };
-        var dst = '<table>' +
-            '<tr class="row1"><td class="col1">a</td><td class="col2">b</td></tr>' +
-            '<tr class="row2"><td class="col1">c</td></tr>' +
-            '</table>';
-        return expect(liquid.parseAndRender(src, ctx)).to.eventually.equal(dst);
-    });
+  it('should support tablerow', function () {
+    var src = '{% tablerow i in alpha cols:2 %}{{ i }}{% endtablerow %}'
+    var ctx = {
+      alpha: ['a', 'b', 'c']
+    }
+    var dst = '<table>' +
+      '<tr class="row1"><td class="col1">a</td><td class="col2">b</td></tr>' +
+      '<tr class="row2"><td class="col1">c</td></tr>' +
+      '</table>'
+    return expect(liquid.parseAndRender(src, ctx)).to.eventually.equal(dst)
+  })
 
-    it('should support empty tablerow', function() {
-        var src = '{% tablerow i in (1..0) cols:2 %}{{ i }}{% endtablerow %}';
-        var dst = '<table></table>';
-        return expect(liquid.parseAndRender(src)).to.eventually.equal(dst);
-    });
+  it('should support empty tablerow', function () {
+    var src = '{% tablerow i in (1..0) cols:2 %}{{ i }}{% endtablerow %}'
+    var dst = '<table></table>'
+    return expect(liquid.parseAndRender(src)).to.eventually.equal(dst)
+  })
 
-    it('should throw when tablerow not closed', function() {
-        var src = '{% tablerow i in (1..0) cols:2 %}{{ i }}';
-        return expect(liquid.parseAndRender(src))
-            .to.be.rejectedWith(/tag .* not closed/);
-    });
+  it('should support empty array', function () {
+    var src = '{% tablerow i in alpha.z cols:2 %}{{ i }}{% endtablerow %}'
+    var dst = '<table></table>'
+    return expect(liquid.parseAndRender(src)).to.eventually.equal(dst)
+  })
 
-    it('should support tablerow with range', function() {
-        var src = '{% tablerow i in (1..5) cols:2 %}{{ i }}{% endtablerow %}';
-        var dst = '<table>' +
-            '<tr class="row1"><td class="col1">1</td><td class="col2">2</td></tr>' +
-            '<tr class="row2"><td class="col1">3</td><td class="col2">4</td></tr>' +
-            '<tr class="row3"><td class="col1">5</td></tr>' +
-            '</table>';
-        return expect(liquid.parseAndRender(src)).to.eventually.equal(dst);
-    });
+  it('should throw when tablerow not closed', function () {
+    var src = '{% tablerow i in (1..0) cols:2 %}{{ i }}'
+    return expect(liquid.parseAndRender(src))
+      .to.be.rejectedWith(/tag .* not closed/)
+  })
 
-    it('tablerow should throw on illegal cols 1', function() {
-        var src = '{% tablerow i in (1..5) cols:0 %}{{ i }}{% endtablerow %}';
-        return expect(liquid.parseAndRender(src))
-            .to.be.rejectedWith(/illegal cols: 0/);
-    });
-    it('tablerow should throw on illegal cols 2', function() {
-        var src = '{% tablerow i in (1..5) %}{{ i }}{% endtablerow %}';
-        return expect(liquid.parseAndRender(src))
-            .to.be.rejectedWith(/illegal cols: undefined/);
-    });
+  it('should support tablerow with range', function () {
+    var src = '{% tablerow i in (1..5) cols:2 %}{{ i }}{% endtablerow %}'
+    var dst = '<table>' +
+      '<tr class="row1"><td class="col1">1</td><td class="col2">2</td></tr>' +
+      '<tr class="row2"><td class="col1">3</td><td class="col2">4</td></tr>' +
+      '<tr class="row3"><td class="col1">5</td></tr>' +
+      '</table>'
+    return expect(liquid.parseAndRender(src)).to.eventually.equal(dst)
+  })
 
-    it('should support tablerow with limit', function() {
-        var src = '{% tablerow i in (1..5) cols:2 limit:3 %}{{ i }}{% endtablerow %}';
-        var dst = '<table>' +
-            '<tr class="row1"><td class="col1">1</td><td class="col2">2</td></tr>' +
-            '<tr class="row2"><td class="col1">3</td></tr>' +
-            '</table>';
-        return expect(liquid.parseAndRender(src)).to.eventually.equal(dst);
-    });
+  it('tablerow should throw on illegal cols 1', function () {
+    var src = '{% tablerow i in (1..5) cols:0 %}{{ i }}{% endtablerow %}'
+    return expect(liquid.parseAndRender(src))
+      .to.be.rejectedWith(/illegal cols: 0/)
+  })
+  it('tablerow should throw on illegal cols 2', function () {
+    var src = '{% tablerow i in (1..5) %}{{ i }}{% endtablerow %}'
+    return expect(liquid.parseAndRender(src))
+      .to.be.rejectedWith(/illegal cols: undefined/)
+  })
 
-    it('should support tablerow with offset', function() {
-        var src = '{% tablerow i in (1..5) cols:2 offset:3 %}{{ i }}{% endtablerow %}';
-        var dst = '<table>' +
-            '<tr class="row1"><td class="col1">4</td><td class="col2">5</td></tr>' +
-            '</table>';
-        return expect(liquid.parseAndRender(src)).to.eventually.equal(dst);
-    });
-});
+  it('should support tablerow with limit', function () {
+    var src = '{% tablerow i in (1..5) cols:2 limit:3 %}{{ i }}{% endtablerow %}'
+    var dst = '<table>' +
+      '<tr class="row1"><td class="col1">1</td><td class="col2">2</td></tr>' +
+      '<tr class="row2"><td class="col1">3</td></tr>' +
+      '</table>'
+    return expect(liquid.parseAndRender(src)).to.eventually.equal(dst)
+  })
+
+  it('should support tablerow with offset', function () {
+    var src = '{% tablerow i in (1..5) cols:2 offset:3 %}{{ i }}{% endtablerow %}'
+    var dst = '<table>' +
+      '<tr class="row1"><td class="col1">4</td><td class="col2">5</td></tr>' +
+      '</table>'
+    return expect(liquid.parseAndRender(src)).to.eventually.equal(dst)
+  })
+})

test/tags/unless.js

@@ -1,34 +1,35 @@
-const Liquid = require('../..');
-const chai = require("chai");
-const expect = chai.expect;
-chai.use(require("chai-as-promised"));
+const Liquid = require('../..')
+const chai = require('chai')
+const expect = chai.expect
+chai.use(require('chai-as-promised'))
 
-describe('tags/unless', function() {
-    var liquid = Liquid();
+describe('tags/unless', function () {
+  var liquid = Liquid()
 
-    it('should render else when predicate yields true', function() {
-        var src = '{% unless 1 %}yes{%else%}no{%endunless%}';
-        return expect(liquid.parseAndRender(src))
-            .to.eventually.equal('no');
-    });
-    it('should render unless when predicate yields false', function() {
-        var src = '{% unless 0 %}yes{%else%}no{%endunless%}';
-        return expect(liquid.parseAndRender(src))
-            .to.eventually.equal('yes');
-    });
-    it('should reject when tag not closed', function() {
-        var src = '{% unless 1>2 %}yes';
-        return expect(liquid.parseAndRender(src))
-            .to.be.rejectedWith(/tag {% unless 1>2 %} not closed/);
-    });
-    it('should render unless when predicate yields false and else undefined', function() {
-        var src = '{% unless 1>2 %}yes{%endunless%}';
-        return expect(liquid.parseAndRender(src))
-            .to.eventually.equal('yes');
-    });
-    it('should render "" when predicate yields false and else undefined', function() {
-        var src = '{% unless 1<2 %}yes{%endunless%}';
-        return expect(liquid.parseAndRender(src))
-            .to.eventually.equal('');
-    });
-});
+  it('should render else when predicate yields true', function () {
+    // 0 is truthy
+    var src = '{% unless 0 %}yes{%else%}no{%endunless%}'
+    return expect(liquid.parseAndRender(src))
+      .to.eventually.equal('no')
+  })
+  it('should render unless when predicate yields false', function () {
+    var src = '{% unless false %}yes{%else%}no{%endunless%}'
+    return expect(liquid.parseAndRender(src))
+      .to.eventually.equal('yes')
+  })
+  it('should reject when tag not closed', function () {
+    var src = '{% unless 1>2 %}yes'
+    return expect(liquid.parseAndRender(src))
+      .to.be.rejectedWith(/tag {% unless 1>2 %} not closed/)
+  })
+  it('should render unless when predicate yields false and else undefined', function () {
+    var src = '{% unless 1>2 %}yes{%endunless%}'
+    return expect(liquid.parseAndRender(src))
+      .to.eventually.equal('yes')
+  })
+  it('should render "" when predicate yields false and else undefined', function () {
+    var src = '{% unless 1<2 %}yes{%endunless%}'
+    return expect(liquid.parseAndRender(src))
+      .to.eventually.equal('')
+  })
+})

test/tokenizer.js

@@ -1,57 +1,159 @@
-var chai = require("chai");
-var should = chai.should();
-var expect = chai.expect;
+const chai = require('chai')
+const parse = require('../src/tokenizer.js').parse
+const whiteSpaceCtrl = require('../src/tokenizer.js').whiteSpaceCtrl
+const expect = chai.expect
 
-var tokenizer = require('../src/tokenizer.js');
+describe('tokenizer', function () {
+  describe('parse', function () {
+    it('should handle plain HTML', function () {
+      var html = '<html><body><p>Lorem Ipsum</p></body></html>'
+      var tokens = parse(html)
 
-describe('tokenizer', function() {
-    it('should handle plain HTML', function() {
-        var html = '<html><body><p>Lorem Ipsum</p></body></html>';
-        var tokens = tokenizer.parse(html);
+      expect(tokens.length).to.equal(1)
+      expect(tokens[0].value).to.equal(html)
+      expect(tokens[0].type).to.equal('html')
+    })
+    it('should throw when non-string passed in', function () {
+      expect(function () {
+        parse({})
+      }).to.throw('illegal input type')
+    })
+    it('should handle tag syntax', function () {
+      var html = '<p>{% for p in a[1]%}</p>'
+      var tokens = parse(html)
 
-        tokens.length.should.equal(1);
-        tokens[0].value.should.equal(html);
-        tokens[0].type.should.equal('html');
-    });
-    it('should throw when non-string passed in', function() {
-        expect(function() {
-            tokenizer.parse({});
-        }).to.throw('illegal input type');
-    });
-    it('should handle tag syntax', function() {
-        var html = '<p>{% for p in a[1]%}</p>';
-        var tokens = tokenizer.parse(html);
+      expect(tokens.length).to.equal(3)
+      expect(tokens[1].type).to.equal('tag')
+      expect(tokens[1].value).to.equal('for p in a[1]')
+    })
+    it('should handle output syntax', function () {
+      var html = '<p>{{foo | date: "%Y-%m-%d"}}</p>'
+      var tokens = parse(html)
 
-        tokens.length.should.equal(3);
-        tokens[1].type.should.equal('tag');
-        tokens[1].value.should.equal('for p in a[1]');
-    });
-    it('should handle output syntax', function() {
-        var html = '<p>{{foo | date: "%Y-%m-%d"}}</p>';
-        var tokens = tokenizer.parse(html);
+      expect(tokens.length).to.equal(3)
+      expect(tokens[1].type).to.equal('output')
+      expect(tokens[1].value).to.equal('foo | date: "%Y-%m-%d"')
+    })
+    it('should handle successive outputs and tags', function () {
+      var html = '{{foo}}{{bar}}{%foo%}{%bar%}'
+      var tokens = parse(html)
 
-        tokens.length.should.equal(3);
-        tokens[1].type.should.equal('output');
-        tokens[1].value.should.equal('foo | date: "%Y-%m-%d"');
-    });
-    it('should handle successive outputs and tags', function() {
-        var html = '{{foo}}{{bar}}{%foo%}{%bar%}';
-        var tokens = tokenizer.parse(html);
+      expect(tokens.length).to.equal(4)
+      expect(tokens[0].type).to.equal('output')
+      expect(tokens[3].type).to.equal('tag')
 
-        tokens.length.should.equal(4);
-        tokens[0].type.should.equal('output');
-        tokens[3].type.should.equal('tag');
-
-        tokens[1].value.should.equal('bar');
-        tokens[2].value.should.equal('foo');
-    });
-    it('should keep white spaces and newlines', function() {
-        var html = '{{foo}}\n{%bar %}  \n {{alice}}';
-        var tokens = tokenizer.parse(html);
-        expect(tokens.length).to.equal(5);
-        expect(tokens[1].type).to.equal('html');
-        expect(tokens[1].raw).to.equal('\n');
-        expect(tokens[3].type).to.equal('html');
-        expect(tokens[3].raw).to.equal('  \n ');
-    });
-});
+      expect(tokens[1].value).to.equal('bar')
+      expect(tokens[2].value).to.equal('foo')
+    })
+    it('should keep white spaces and newlines', function () {
+      var html = '{%foo%}\n{%bar %}  \n {%alice%}'
+      var tokens = parse(html)
+      expect(tokens.length).to.equal(5)
+      expect(tokens[1].type).to.equal('html')
+      expect(tokens[1].raw).to.equal('\n')
+      expect(tokens[3].type).to.equal('html')
+      expect(tokens[3].raw).to.equal('  \n ')
+    })
+    it('should handle multiple lines tag', function () {
+      var html = '{%foo\na:a\nb:1.23\n%}'
+      var tokens = parse(html)
+      expect(tokens.length).to.equal(1)
+      expect(tokens[0].type).to.equal('tag')
+      expect(tokens[0].args).to.equal('a:a\nb:1.23')
+      expect(tokens[0].raw).to.equal('{%foo\na:a\nb:1.23\n%}')
+    })
+    it('should handle multiple lines output', function () {
+      var html = '{{foo\n|date:\n"%Y-%m-%d"\n}}'
+      var tokens = parse(html)
+      expect(tokens.length).to.equal(1)
+      expect(tokens[0].type).to.equal('output')
+      expect(tokens[0].raw).to.equal('{{foo\n|date:\n"%Y-%m-%d"\n}}')
+    })
+  })
+  describe('whitespace control', function () {
+    it('should not strip by default (tag)', function () {
+      expect(whiteSpaceCtrl('\n {%foo%} \n')).to.equal('\n {%foo%} \n')
+    })
+    it('should strip all blank characters before and after (tag)', function () {
+      expect(whiteSpaceCtrl(' \t\r{%-foo-%} \t\n')).to.equal('{%-foo-%}')
+    })
+    it('should not trim previous/next lines (tag)', function () {
+      expect(whiteSpaceCtrl(' \t\n {%-foo-%}')).to.equal(' \t\n{%-foo-%}')
+      expect(whiteSpaceCtrl('{%-foo-%} \n \tfoo')).to.equal('{%-foo-%} \tfoo')
+    })
+    it('should trim exactly one trailing CR (tag)', function () {
+      expect(whiteSpaceCtrl('{%-foo-%} \n\n')).to.equal('{%-foo-%}\n')
+    })
+    it('should trim exactly one trailing CR (tag)', function () {
+      expect(whiteSpaceCtrl('{%-foo-%} \n\n')).to.equal('{%-foo-%}\n')
+    })
+    it('should trim all leading/trailing blanks when options.greedy set (tag)', function () {
+      expect(whiteSpaceCtrl(' \n \n\t\r{%-foo-%}\n \n', {
+        greedy: true
+      })).to.equal('{%-foo-%}')
+    })
+    it('should strip whitespaces when set trim_left (tag)', function () {
+      expect(whiteSpaceCtrl('\n  {%foo%} \n', {
+        trim_left: true
+      })).to.equal('\n{%-foo%} \n')
+    })
+    it('should strip whitespaces when set trim_right (tag)', function () {
+      expect(whiteSpaceCtrl('\n  {%foo%} \n', {
+        trim_right: true
+      })).to.equal('\n  {%foo-%}')
+    })
+    it('markup should has priority over options (tag)', function () {
+      expect(whiteSpaceCtrl('\n  {%-foo%} \n', {
+        trim_left: false
+      })).to.equal('\n{%-foo%} \n')
+    })
+    it('should support a mix of markup and options (tag)', function () {
+      expect(whiteSpaceCtrl('  {%-foo%} \n', {
+        trim_left: true,
+        trim_right: true
+      })).to.equal('{%-foo-%}')
+    })
+    it('should not strip by default (value)', function () {
+      expect(whiteSpaceCtrl('\n {{foo}} \n')).to.equal('\n {{foo}} \n')
+    })
+    it('should strip all blank characters before and after (value)', function () {
+      expect(whiteSpaceCtrl(' \t\r{{-foo-}} \t\n')).to.equal('{{-foo-}}')
+    })
+    it('should not trim previous/next lines (value)', function () {
+      expect(whiteSpaceCtrl(' \t\n {{-foo-}}')).to.equal(' \t\n{{-foo-}}')
+      expect(whiteSpaceCtrl('{{-foo-}} \n \tfoo')).to.equal('{{-foo-}} \tfoo')
+    })
+    it('should trim exactly one trailing CR (value)', function () {
+      expect(whiteSpaceCtrl('{{-foo-}} \n\n')).to.equal('{{-foo-}}\n')
+    })
+    it('should trim exactly one trailing CR (value)', function () {
+      expect(whiteSpaceCtrl('{{-foo-}} \n\n')).to.equal('{{-foo-}}\n')
+    })
+    it('should trim all leading/trailing blanks when options.greedy set (value)', function () {
+      expect(whiteSpaceCtrl(' \n \n\t\r{{-foo-}}\n \n', {
+        greedy: true
+      })).to.equal('{{-foo-}}')
+    })
+    it('should strip whitespaces when set trim_left (value)', function () {
+      expect(whiteSpaceCtrl('\n  {{foo}} \n', {
+        trim_left: true
+      })).to.equal('\n{{-foo}} \n')
+    })
+    it('should strip whitespaces when set trim_right (value)', function () {
+      expect(whiteSpaceCtrl('\n  {{foo}} \n', {
+        trim_right: true
+      })).to.equal('\n  {{foo-}}')
+    })
+    it('markup should has priority over options (value)', function () {
+      expect(whiteSpaceCtrl('\n  {{-foo}} \n', {
+        trim_left: false
+      })).to.equal('\n{{-foo}} \n')
+    })
+    it('should support a mix of markup and options (value)', function () {
+      expect(whiteSpaceCtrl('  {{-foo}} \n', {
+        trim_left: true,
+        trim_right: true
+      })).to.equal('{{-foo-}}')
+    })
+  })
+})

test/util/assert.js

@@ -0,0 +1,18 @@
+const chai = require('chai')
+const expect = chai.expect
+const assert = require('../../src/util/assert.js')
+
+describe('assert', function () {
+  it('should not throw if predicate is truthy', function () {
+    var fn = () => assert('foo', 'bar')
+    expect(fn).to.not.throw()
+  })
+  it('should not throw if predicate is truthy', function () {
+    var fn = () => assert('', 'bar')
+    expect(fn).to.throw(/bar/)
+  })
+  it('should populate default message', function () {
+    var fn = () => assert(false)
+    expect(fn).to.throw(/expect false to be true/)
+  })
+})

test/util/error.js

@@ -1,326 +1,390 @@
-const chai = require("chai");
-const expect = chai.expect;
-const mock = require('mock-fs');
-chai.use(require("chai-as-promised"));
+const chai = require('chai')
+const expect = chai.expect
+const mock = require('mock-fs')
+chai.use(require('chai-as-promised'))
 
-var engine = require('../..')();
+var engine = require('../..')()
 var strictEngine = require('../..')({
-    strict_variables: true,
-    strict_filters: true
-});
+  strict_variables: true,
+  strict_filters: true
+})
 
-describe('error', function() {
+describe('error', function () {
+  afterEach(function () {
+    mock.restore()
+  })
 
-    describe('TokenizationError', function() {
-        it('should throw TokenizationError when tag illegal', function() {
-            return expect(engine.parseAndRender('{% . a %}', {})).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.name).to.equal('TokenizationError');
-                    expect(err.message).to.contain('illegal tag syntax');
-                });
-        });
-        it('should contain template content in err.message', function() {
-            var html = ['1st', '2nd', 'X{% . a %} Y', '4th'];
-            var message = [
-                '   1| 1st',
-                '   2| 2nd',
-                '>> 3| X{% . a %} Y',
-                '   4| 4th',
-                'TokenizationError: illegal tag syntax',
-            ];
-            return expect(engine.parseAndRender(html.join('\n'))).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.message).to.equal('illegal tag syntax, line:3');
-                    expect(err.stack).to.contain(message.join('\n'));
-                    expect(err.name).to.equal('TokenizationError');
-                });
-        });
-        it('should contain the whole template content in err.input', function() {
-            var html = 'bar\nfoo{% . a %}\nfoo';
-            return expect(engine.parseAndRender(html)).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.input).to.equal(html);
-                });
-        });
-        it('should contain line number in err.line', function() {
-            return expect(engine.parseAndRender('1\n2\n{% . a %}\n4', {})).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.name).to.equal('TokenizationError');
-                    expect(err.line).to.equal(3);
-                });
-        });
-        it('should contain stack in err.stack', function() {
-            return expect(engine.parseAndRender('{% . a %}')).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.stack).to.contain('illegal tag syntax');
-                    expect(err.stack).to.contain('at Object.parse');
-                });
-        });
-        it('should contain file path in err.file', function() {
-            var html = '<html>\n<head>\n\n{% . a %}\n\n';
-            mock({
-                "/foo.html": html
-            });
-            return expect(engine.renderFile('/foo.html')).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    mock.restore();
-                    expect(err.name).to.equal('TokenizationError');
-                    expect(err.file).to.equal('/foo.html');
-                });
-        });
-    });
+  describe('TokenizationError', function () {
+    it('should throw TokenizationError when tag illegal', function () {
+      return expect(engine.parseAndRender('{% . a %}', {})).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.name).to.equal('TokenizationError')
+          expect(err.message).to.contain('illegal tag syntax')
+        })
+    })
+    it('should contain template content in err.message', function () {
+      var html = ['1st', '2nd', 'X{% . a %} Y', '4th']
+      var message = [
+        '   1| 1st',
+        '   2| 2nd',
+        '>> 3| X{% . a %} Y',
+        '   4| 4th',
+        'TokenizationError'
+      ]
+      return expect(engine.parseAndRender(html.join('\n'))).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.message).to.equal('illegal tag syntax, line:3')
+          expect(err.stack).to.contain(message.join('\n'))
+          expect(err.name).to.equal('TokenizationError')
+        })
+    })
+    it('should contain the whole template content in err.input', function () {
+      var html = 'bar\nfoo{% . a %}\nfoo'
+      return expect(engine.parseAndRender(html)).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.input).to.equal(html)
+        })
+    })
+    it('should contain line number in err.line', function () {
+      return expect(engine.parseAndRender('1\n2\n{% . a %}\n4', {})).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.name).to.equal('TokenizationError')
+          expect(err.line).to.equal(3)
+        })
+    })
+    it('should contain stack in err.stack', function () {
+      return expect(engine.parseAndRender('{% . a %}')).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.message).to.contain('illegal tag syntax')
+          expect(err.stack).to.contain('at Object.parse')
+        })
+    })
+    describe('captureStackTrace compatibility', function () {
+      var captureStackTrace = Error.captureStackTrace
+      before(() => (Error.captureStackTrace = null))
+      after(() => (Error.captureStackTrace = captureStackTrace))
+      it('should use empty string if captureStackTrace not defined', function () {
+        return expect(engine.parseAndRender('{% . a %}')).to.eventually
+          .be.rejected
+          .then(function (err) {
+            expect(err.stack).to.contain('illegal tag syntax')
+            expect(err.stack).to.not.contain('at Object.parse')
+          })
+      })
+    })
+    it('should contain file path in err.file', function () {
+      var html = '<html>\n<head>\n\n{% . a %}\n\n'
+      mock({
+        '/foo.html': html
+      })
+      return expect(engine.renderFile('/foo.html')).to.eventually
+        .be.rejected
+        .then(function (err) {
+          mock.restore()
+          expect(err.name).to.equal('TokenizationError')
+          expect(err.file).to.equal('/foo.html')
+        })
+    })
+  })
 
-    describe('RenderError', function() {
-        beforeEach(function() {
-            engine = require('../..')();
-            engine.registerTag('throwingTag', {
-                render: function() {
-                    throw new Error('intended render error');
-                }
-            });
-            engine.registerTag('rejectingTag', {
-                render: function() {
-                    return Promise.reject(new Error('intended render reject'));
-                }
-            });
-            engine.registerFilter('throwingFilter', () => {
-                throw new Error('throwed by filter');
-            });
-        });
-        it('should throw RenderError when tag throws', function() {
-            var src = '{%throwingTag%}';
-            return expect(engine.parseAndRender(src)).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.name).to.equal('RenderError');
-                    expect(err.message).to.contain('intended render error');
-                });
-        });
-        it('should throw RenderError when tag rejects', function() {
-            var src = '{%rejectingTag%}';
-            return expect(engine.parseAndRender(src)).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.name).to.equal('RenderError');
-                    expect(err.message).to.contain('intended render reject');
-                });
-        });
-        it('should throw RenderError when filter throws', function() {
-            var src = '{{1|throwingFilter}}';
-            return expect(engine.parseAndRender(src)).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.name).to.equal('RenderError');
-                    expect(err.message).to.contain('throwed by filter');
-                });
-        });
-        it('should not throw when variable undefined by default', function() {
-            return expect(engine.parseAndRender('X{{a}}Y')).to.eventually.equal('XY');
-        });
-        it('should throw RenderError when variable not defined', function() {
-            return expect(strictEngine.parseAndRender('{{a}}')).to.eventually
-                .be.rejected
-                .then(function(e) {
-                    expect(e).to.have.property('name', 'RenderError');
-                    expect(e.message).to.contain('undefined variable: a');
-                });
-        });
-        it('should contain template content in err.message', function() {
-            var html = ['1st', '2nd', '3rd', 'X{%throwingTag%} Y', '5th', '6th', '7th'];
-            var message = [
-                '   2| 2nd',
-                '   3| 3rd',
-                '>> 4| X{%throwingTag%} Y',
-                '   5| 5th',
-                '   6| 6th',
-                '   7| 7th',
-                'Error: intended render error',
-            ];
-            return expect(engine.parseAndRender(html.join('\n'))).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.message).to.equal('intended render error, line:4');
-                    expect(err.stack).to.contain(message.join('\n'));
-                    expect(err.name).to.equal('RenderError');
-                });
-        });
-        it('should contain the whole template content in err.input', function() {
-            var html = 'bar\nfoo{%throwingTag%}\nfoo';
-            return expect(engine.parseAndRender(html)).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.input).to.equal(html);
-                    expect(err.name).to.equal('RenderError');
-                });
-        });
-        it('should contain line number in err.line', function() {
-            var src = '1\n2\n{{1|throwingFilter}}\n4';
-            return expect(engine.parseAndRender(src)).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.line).to.equal(3);
-                    expect(err.name).to.equal('RenderError');
-                });
-        });
-        it('should contain stack in err.stack', function() {
-            return expect(engine.parseAndRender('{%rejectingTag%}')).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.stack).to.contain('intended render reject');
-                    expect(err.stack).to.contain('at Object.engine.registerTag.render');
-                });
-        });
+  describe('RenderError', function () {
+    beforeEach(function () {
+      engine = require('../..')({
+        root: '/'
+      })
+      engine.registerTag('throwingTag', {
+        render: function () {
+          throw new Error('intended render error')
+        }
+      })
+      engine.registerTag('rejectingTag', {
+        render: function () {
+          return Promise.reject(new Error('intended render reject'))
+        }
+      })
+      engine.registerFilter('throwingFilter', () => {
+        throw new Error('throwed by filter')
+      })
+    })
+    it('should throw RenderError when tag throws', function () {
+      var src = '{%throwingTag%}'
+      return expect(engine.parseAndRender(src)).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.name).to.equal('RenderError')
+          expect(err.message).to.contain('intended render error')
+        })
+    })
+    it('should throw RenderError when tag rejects', function () {
+      var src = '{%rejectingTag%}'
+      return expect(engine.parseAndRender(src)).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.name).to.equal('RenderError')
+          expect(err.message).to.contain('intended render reject')
+        })
+    })
+    it('should throw RenderError when filter throws', function () {
+      var src = '{{1|throwingFilter}}'
+      return expect(engine.parseAndRender(src)).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.name).to.equal('RenderError')
+          expect(err.message).to.contain('throwed by filter')
+        })
+    })
+    it('should not throw when variable undefined by default', function () {
+      return expect(engine.parseAndRender('X{{a}}Y')).to.eventually.equal('XY')
+    })
+    it('should throw RenderError when variable not defined', function () {
+      return expect(strictEngine.parseAndRender('{{a}}')).to.eventually
+        .be.rejected
+        .then(function (e) {
+          expect(e).to.have.property('name', 'RenderError')
+          expect(e.message).to.contain('undefined variable: a')
+        })
+    })
+    it('should contain template context in err.stack', function () {
+      var html = ['1st', '2nd', '3rd', 'X{%throwingTag%} Y', '5th', '6th', '7th']
+      var message = [
+        '   2| 2nd',
+        '   3| 3rd',
+        '>> 4| X{%throwingTag%} Y',
+        '   5| 5th',
+        '   6| 6th',
+        '   7| 7th',
+        'RenderError'
+      ]
+      return expect(engine.parseAndRender(html.join('\n'))).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.message).to.equal('intended render error, line:4')
+          expect(err.stack).to.contain(message.join('\n'))
+          expect(err.name).to.equal('RenderError')
+        })
+    })
+    it('should contain original error info for {% layout %}', function () {
+      mock({
+        '/throwing-tag.html': [
+          '1st',
+          '2nd',
+          '3rd',
+          'X{%throwingTag%} Y',
+          '5th',
+          '{%block%}{%endblock%}',
+          '7th'
+        ].join('\n')
+      })
+      var html = '{%layout "throwing-tag.html"%}'
+      var message = [
+        '   2| 2nd',
+        '   3| 3rd',
+        '>> 4| X{%throwingTag%} Y',
+        '   5| 5th',
+        '   6| {%block%}{%endblock%}',
+        '   7| 7th',
+        'RenderError'
+      ]
+      return expect(engine.parseAndRender(html)).to.eventually
+        .be.rejected
+        .then(function (err) {
+          console.log(err.message)
+          console.log(err.stack)
+          expect(err.message).to.equal('intended render error, file:/throwing-tag.html, line:4')
+          expect(err.stack).to.contain(message.join('\n'))
+          expect(err.name).to.equal('RenderError')
+        })
+    })
+    it('should contain original error info for {% include %}', function () {
+      var origin = ['1st', '2nd', '3rd', 'X{%throwingTag%} Y', '5th', '6th', '7th']
+      mock({
+        '/throwing-tag.html': origin.join('\n')
+      })
+      var html = '{%include "throwing-tag.html"%}'
+      var message = [
+        '   2| 2nd',
+        '   3| 3rd',
+        '>> 4| X{%throwingTag%} Y',
+        '   5| 5th',
+        '   6| 6th',
+        '   7| 7th',
+        'RenderError'
+      ]
+      return expect(engine.parseAndRender(html)).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.message).to.equal('intended render error, file:/throwing-tag.html, line:4')
+          expect(err.stack).to.contain(message.join('\n'))
+          expect(err.name).to.equal('RenderError')
+        })
+    })
+    it('should contain the whole template content in err.input', function () {
+      var html = 'bar\nfoo{%throwingTag%}\nfoo'
+      return expect(engine.parseAndRender(html)).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.input).to.equal(html)
+          expect(err.name).to.equal('RenderError')
+        })
+    })
+    it('should contain line number in err.line', function () {
+      var src = '1\n2\n{{1|throwingFilter}}\n4'
+      return expect(engine.parseAndRender(src)).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.line).to.equal(3)
+          expect(err.name).to.equal('RenderError')
+        })
+    })
+    it('should contain stack in err.stack', function () {
+      return expect(engine.parseAndRender('{%rejectingTag%}')).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.message).to.contain('intended render reject')
+          expect(err.stack).to.match(/at .*:\d+:\d+/)
+        })
+    })
 
-        it('should contain file path in err.file', function() {
-            var html = '<html>\n<head>\n\n{% throwingTag %}\n\n';
-            mock({
-                "/foo.html": html
-            });
-            return expect(engine.renderFile('/foo.html')).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    mock.restore();
-                    expect(err.name).to.equal('RenderError');
-                    expect(err.file).to.equal('/foo.html');
-                });
-        });
-    });
+    it('should contain file path in err.file', function () {
+      var html = '<html>\n<head>\n\n{% throwingTag %}\n\n'
+      mock({
+        '/foo.html': html
+      })
+      return expect(engine.renderFile('/foo.html')).to.eventually
+        .be.rejected
+        .then(function (err) {
+          mock.restore()
+          expect(err.name).to.equal('RenderError')
+          expect(err.file).to.equal('/foo.html')
+        })
+    })
+  })
 
-    describe('ParseError', function() {
-        beforeEach(function() {
-            engine = require('../..')();
-            engine.registerTag('throwsOnParse', {
-                parse: function() {
-                    throw new Error('intended parse error');
-                }
-            });
-        });
-        it('should throw RenderError when filter not defined', function() {
-            return expect(strictEngine.parseAndRender('{{1 | a}}')).to.eventually
-                .be.rejected
-                .then(function(e) {
-                    expect(e).to.have.property('name', 'ParseError');
-                    expect(e.message).to.contain('undefined filter: a');
-                });
-        });
-        it('should throw ParseError when tag not closed', function() {
-            return expect(engine.parseAndRender('{% if %}')).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.name).to.equal('ParseError');
-                    expect(err.message).to.contain('tag {% if %} not closed');
-                });
-        });
-        it('should throw ParseError when tag parse throws', function() {
-            var src = '{%throwsOnParse%}';
-            return expect(engine.parseAndRender(src)).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.name).to.equal('ParseError');
-                    expect(err.message).to.contain('intended parse error');
-                });
-        });
-        it('should throw ParseError when tag not found', function() {
-            var src = '{%if true%}\naaa{%endif%}\n{% -a %}\n3';
-            return expect(engine.parseAndRender(src)).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.name).to.equal('ParseError');
-                    expect(err.message).to.contain('tag -a not found');
-                });
-        });
+  describe('ParseError', function () {
+    beforeEach(function () {
+      engine = require('../..')()
+      engine.registerTag('throwsOnParse', {
+        parse: function () {
+          throw new Error('intended parse error')
+        }
+      })
+    })
+    it('should throw RenderError when filter not defined', function () {
+      return expect(strictEngine.parseAndRender('{{1 | a}}')).to.eventually
+        .be.rejected
+        .then(function (e) {
+          expect(e).to.have.property('name', 'ParseError')
+          expect(e.message).to.contain('undefined filter: a')
+        })
+    })
+    it('should throw ParseError when tag not closed', function () {
+      return expect(engine.parseAndRender('{% if %}')).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.name).to.equal('ParseError')
+          expect(err.message).to.contain('tag {% if %} not closed')
+        })
+    })
+    it('should throw ParseError when tag parse throws', function () {
+      var src = '{%throwsOnParse%}'
+      return expect(engine.parseAndRender(src)).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.name).to.equal('ParseError')
+          expect(err.message).to.contain('intended parse error')
+        })
+    })
+    it('should throw ParseError when tag not found', function () {
+      var src = '{%if true%}\naaa{%endif%}\n{% -a %}\n3'
+      return expect(engine.parseAndRender(src)).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.name).to.equal('ParseError')
+          expect(err.message).to.contain('tag -a not found')
+        })
+    })
 
-        it('should throw ParseError when tag not exist', function() {
-            return expect(engine.parseAndRender('{% a %}')).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.name).to.equal('ParseError');
-                    expect(err.message).to.contain('tag a not found');
-                });
-        });
+    it('should throw ParseError when tag not exist', function () {
+      return expect(engine.parseAndRender('{% a %}')).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.name).to.equal('ParseError')
+          expect(err.message).to.contain('tag a not found')
+        })
+    })
 
-        it('should contain template content in err.message', function() {
-            var html = ['1st', '2nd', '3rd', 'X{% a %} {% enda %} Y', '5th', '6th', '7th'];
-            var message = [
-                '   2| 2nd',
-                '   3| 3rd',
-                '>> 4| X{% a %} {% enda %} Y',
-                '   5| 5th',
-                '   6| 6th',
-                '   7| 7th',
-                'AssertionError: tag a not found',
-            ];
-            return expect(engine.parseAndRender(html.join('\n'))).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.message).to.equal('tag a not found, line:4');
-                    expect(err.stack).to.contain(message.join('\n'));
-                    expect(err.name).to.equal('ParseError');
-                });
-        });
+    it('should contain template context in err.stack', function () {
+      var html = ['1st', '2nd', '3rd', 'X{% a %} {% enda %} Y', '5th', '6th', '7th']
+      var message = [
+        '   2| 2nd',
+        '   3| 3rd',
+        '>> 4| X{% a %} {% enda %} Y',
+        '   5| 5th',
+        '   6| 6th',
+        '   7| 7th',
+        'ParseError: tag a not found'
+      ]
+      return expect(engine.parseAndRender(html.join('\n'))).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.message).to.equal('tag a not found, line:4')
+          expect(err.stack).to.contain(message.join('\n'))
+          expect(err.name).to.equal('ParseError')
+        })
+    })
 
-        it('should handle err.message when context not enough', function() {
-            var html = ['1st', 'X{% a %} {% enda %} Y', '3rd', '4th'];
-            var message = [
-                '   1| 1st',
-                '>> 2| X{% a %} {% enda %} Y',
-                '   3| 3rd',
-                '   4| 4th',
-                'AssertionError: tag a not found',
-            ];
-            return expect(engine.parseAndRender(html.join('\n'))).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.message).to.equal('tag a not found, line:2');
-                    expect(err.stack).to.contain(message.join('\n'));
-                });
-        });
+    it('should handle err.message when context not enough', function () {
+      var html = ['1st', 'X{% a %} {% enda %} Y', '3rd', '4th']
+      var message = [
+        '   1| 1st',
+        '>> 2| X{% a %} {% enda %} Y',
+        '   3| 3rd',
+        '   4| 4th',
+        'ParseError: tag a not found'
+      ]
+      return expect(engine.parseAndRender(html.join('\n'))).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.message).to.equal('tag a not found, line:2')
+          expect(err.stack).to.contain(message.join('\n'))
+        })
+    })
 
-        it('should contain the whole template content in err.input', function() {
-            var html = 'bar\nfoo{% a %}\nfoo';
-            return expect(engine.parseAndRender(html)).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.input).to.equal(html);
-                });
-        });
+    it('should contain line number in err.line', function () {
+      var html = '<html>\n<head>\n\n{% raw %}\n\n'
+      return expect(engine.parseAndRender(html)).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.line).to.equal(4)
+        })
+    })
 
-        it('should contain line number in err.line', function() {
-            var html = '<html>\n<head>\n\n{% raw %}\n\n';
-            return expect(engine.parseAndRender(html)).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.line).to.equal(4);
-                });
-        });
+    it('should contain stack in err.stack', function () {
+      return expect(engine.parseAndRender('{% -a %}')).to.eventually
+        .be.rejected
+        .then(function (err) {
+          expect(err.stack).to.contain('ParseError: tag -a not found')
+          expect(err.stack).to.match(/at .*:\d+:\d+\)/)
+        })
+    })
 
-        it('should contain stack in err.stack', function() {
-            return expect(engine.parseAndRender('{% -a %}')).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    expect(err.stack).to.contain('AssertionError: tag -a not found');
-                    expect(err.stack).to.contain('at Object._tagInstance.parse');
-                });
-        });
-
-        it('should contain file path in err.file', function() {
-            var html = '<html>\n<head>\n\n{% raw %}\n\n';
-            mock({
-                "/foo.html": html
-            });
-            return expect(engine.renderFile('/foo.html')).to.eventually
-                .be.rejected
-                .then(function(err) {
-                    mock.restore();
-                    expect(err.name).to.equal('ParseError');
-                    expect(err.file).to.equal('/foo.html');
-                });
-        });
-    });
-});
+    it('should contain file path in err.file', function () {
+      var html = '<html>\n<head>\n\n{% raw %}\n\n'
+      mock({
+        '/foo.html': html
+      })
+      return expect(engine.renderFile('/foo.html')).to.eventually
+        .be.rejected
+        .then(function (err) {
+          mock.restore()
+          expect(err.name).to.equal('ParseError')
+          expect(err.file).to.equal('/foo.html')
+        })
+    })
+  })
+})

test/util/promise.js

@@ -1,92 +1,94 @@
-const chai = require("chai");
-const sinon = require('sinon');
-const expect = chai.expect;
-chai.use(require("chai-as-promised"));
-chai.use(require("sinon-chai"));
+const chai = require('chai')
+const sinon = require('sinon')
+const expect = chai.expect
+chai.use(require('chai-as-promised'))
+chai.use(require('sinon-chai'))
 
-var P = require('../../src/util/promise.js');
+var P = require('../../src/util/promise.js')
 
-describe('util/promise', function() {
-    describe('.anySeries()', function() {
-        it('should resolve in series', function() {
-            var spy1 = sinon.spy(),
-                spy2 = sinon.spy();
-            return P
-                .anySeries(
-                    ['first', 'second'],
-                    (item, idx) => new Promise(function(resolve, reject) {
-                        if (idx === 0) {
-                            setTimeout(function() {
-                                spy1();
-                                reject(new Error('first cb'));
-                            }, 10);
-                        } else {
-                            spy2();
-                            resolve('foo');
-                        }
-                    }))
-                .then(() => expect(spy2).to.have.been.calledAfter(spy1));
-        });
-        it('should reject when all rejected', function() {
-            var p = P.anySeries(['first', 'second', 'third'],
-                item => Promise.reject(new Error(item)));
-            return expect(p).to.be.rejectedWith("third");
-        });
-        it('should resolve the value that first callback resolved', () => {
-            var p = P.anySeries(['first', 'second'],
-                item => Promise.resolve(item));
-            return expect(p).to.eventually.equal('first');
-        });
-        it('should not call rest of callbacks once resolved', () => {
-            var spy = sinon.spy();
-            return P.anySeries(['first', 'second'], (item, idx) => {
-                    if (idx > 0) {
-                        spy();
-                    }
-                    return Promise.resolve(item);
-                })
-                .then(() => expect(spy).to.not.have.been.called);
-        });
-    });
-    describe('.mapSeries()', function() {
-        it('should resolve when all resolved', function() {
-            var p = P.mapSeries(['first', 'second', 'third'],
-                item => Promise.resolve(item));
-            return expect(p).to.eventually.deep.equal(['first', 'second', "third"]);
-        });
-        it('should reject with the error that first callback rejected', () => {
-            var p = P.mapSeries(['first', 'second'],
-                item => Promise.reject(item));
-            return expect(p).to.rejectedWith('first');
-        });
-        it('should resolve in series', function() {
-            var spy1 = sinon.spy(),
-                spy2 = sinon.spy();
-            return P
-                .mapSeries(
-                    ['first', 'second'],
-                    (item, idx) => new Promise(function(resolve, reject) {
-                        if (idx === 0) {
-                            setTimeout(function() {
-                                spy1();
-                                resolve('first cb');
-                            }, 10);
-                        } else {
-                            spy2();
-                            resolve('foo');
-                        }
-                    }))
-                .then(() => expect(spy2).to.have.been.calledAfter(spy1));
-        });
-        it('should not call rest of callbacks once rejected', () => {
-            var spy = sinon.spy();
-            return P.mapSeries(['first', 'second'], (item, idx) => {
-                    if (idx > 0) {
-                        spy();
-                    }
-                    return Promise.reject(new Error(item));
-                })
-                .catch(() => expect(spy).to.not.have.been.called);
-        });
-    });
-});
+describe('util/promise', function () {
+  describe('.anySeries()', function () {
+    it('should resolve in series', function () {
+      var spy1 = sinon.spy()
+      var spy2 = sinon.spy()
+      return P
+        .anySeries(
+          ['first', 'second'],
+          (item, idx) => new Promise(function (resolve, reject) {
+            if (idx === 0) {
+              setTimeout(function () {
+                spy1()
+                reject(new Error('first cb'))
+              }, 10)
+            } else {
+              spy2()
+              resolve('foo')
+            }
+          }))
+        .then(() => expect(spy2).to.have.been.calledAfter(spy1))
+    })
+    it('should reject when all rejected', function () {
+      var p = P.anySeries(['first', 'second', 'third'],
+        item => Promise.reject(new Error(item)))
+      return expect(p).to.be.rejectedWith('third')
+    })
+    it('should resolve the value that first callback resolved', () => {
+      var p = P.anySeries(['first', 'second'],
+        item => Promise.resolve(item))
+      return expect(p).to.eventually.equal('first')
+    })
+    it('should not call rest of callbacks once resolved', () => {
+      var spy = sinon.spy()
+      return P
+        .anySeries(['first', 'second'], (item, idx) => {
+          if (idx > 0) {
+            spy()
+          }
+          return Promise.resolve(item)
+        })
+        .then(() => expect(spy).to.not.have.been.called)
+    })
+  })
+  describe('.mapSeries()', function () {
+    it('should resolve when all resolved', function () {
+      var p = P.mapSeries(['first', 'second', 'third'],
+        item => Promise.resolve(item))
+      return expect(p).to.eventually.deep.equal(['first', 'second', 'third'])
+    })
+    it('should reject with the error that first callback rejected', () => {
+      var p = P.mapSeries(['first', 'second'],
+        item => Promise.reject(item))
+      return expect(p).to.rejectedWith('first')
+    })
+    it('should resolve in series', function () {
+      var spy1 = sinon.spy()
+      var spy2 = sinon.spy()
+      return P
+        .mapSeries(
+          ['first', 'second'],
+          (item, idx) => new Promise(function (resolve, reject) {
+            if (idx === 0) {
+              setTimeout(function () {
+                spy1()
+                resolve('first cb')
+              }, 10)
+            } else {
+              spy2()
+              resolve('foo')
+            }
+          }))
+        .then(() => expect(spy2).to.have.been.calledAfter(spy1))
+    })
+    it('should not call rest of callbacks once rejected', () => {
+      var spy = sinon.spy()
+      return P
+        .mapSeries(['first', 'second'], (item, idx) => {
+          if (idx > 0) {
+            spy()
+          }
+          return Promise.reject(new Error(item))
+        })
+        .catch(() => expect(spy).to.not.have.been.called)
+    })
+  })
+})

test/util/strftime.js

@@ -1,120 +1,146 @@
-const chai = require("chai");
-const expect = chai.expect;
+const chai = require('chai')
+const expect = chai.expect
 
-var t = require('../../src/util/strftime.js');
+var t = require('../../src/util/strftime.js')
 
-describe('util/strftime', function() {
-    var now;
-    before(function() {
-        mockUTC();
-        now = new Date('2016-01-04T13:15:23');
-        then = new Date('2016-03-06T03:05:03');
-    });
-    after(function() {
-        restoreUTC();
-    });
+describe('util/strftime', function () {
+  var now
+  var then
+  before(function () {
+    mockUTC()
+    now = new Date('2016-01-04T13:15:23.000Z')
+    then = new Date('2016-03-06T03:05:03.000Z')
+  })
+  after(function () {
+    restoreUTC()
+  })
 
-    it('should format UTC datetime', function() {
-        expect(t(now, '%Y-%m-%dT%H:%M:%S')).to.equal('2016-01-04T13:15:23');
-    });
-    it('should format %A as Monday', function() {
-        expect(t(now, '%A')).to.equal('Monday');
-    });
-    it('should format %B as month name', function() {
-        expect(t(now, '%B')).to.equal('January');
-    });
-    it('should format %C as century', function() {
-        expect(t(now, '%C')).to.equal('20');
-    });
-    it('should format %c as local string', function() {
-        expect(t(now, '%c')).to.equal(now.toLocaleString());
-    });
-    it('should format %e as space padded date', function() {
-        expect(t(now, '%e')).to.equal(' 4');
-    });
-    it('should format %I as 0 padded hour12', function() {
-        expect(t(now, '%I')).to.equal('01');
-    });
-    it('should format %j as day of year', function() {
-        expect(t(then, '%j')).to.equal('066');
-    });
-    it('should format %k as space padded hour', function() {
-        expect(t(then, '%k')).to.equal(' 3');
-    });
-    it('should format %l as space padded hour12', function() {
-        expect(t(now, '%l')).to.equal(' 1');
-    });
-    it('should format %L as 0 padded millisecond', function() {
-        expect(t(then, '%L')).to.equal('000');
-    });
-    it('should format %p as upper cased am/pm', function() {
-        expect(t(now, '%p')).to.equal('PM');
-        expect(t(then, '%p')).to.equal('AM');
-    });
-    it('should format %P as lower cased am/pm', function() {
-        expect(t(now, '%P')).to.equal('pm');
-        expect(t(then, '%P')).to.equal('am');
-    });
-    it('should format %q as date suffix', function(){
-        var st = new Date('2016-03-01T03:05:03');
-        var nd = new Date('2016-03-02T03:05:03');
-        var rd = new Date('2016-03-03T03:05:03');
-        expect(t(st, '%q')).to.equal('st');
-        expect(t(nd, '%q')).to.equal('nd');
-        expect(t(rd, '%q')).to.equal('rd');
-        expect(t(now, '%q')).to.equal('th');
-    });
-    it('should format %s as UNIX seconds', function(){
-        expect(t(now, '%s')).to.be.match(/\d+/);
-    });
-    it('should format %u as day of week(1-7)', function(){
-        expect(t(now, '%u')).to.be.equal('1');
-        expect(t(then, '%u')).to.be.equal('7');
-    });
-    it('should format %U as week of year, starts with 0', function() {
-        expect(t(now, '%U')).to.equal('01');
-    });
-    it('should format %w as day of month(0-7)', function(){
-        expect(t(now, '%w')).to.be.equal('1');
-        expect(t(then, '%w')).to.be.equal('0');
-    });
-    it('should format %W as week of year, starts with 1', function(){
-        expect(t(now, '%W')).to.be.equal('01');
-    });
-    it('should format %x as local date string', function() {
-        expect(t(now, '%x')).to.equal(now.toLocaleDateString());
-    });
-    it('should format %X as local time string', function() {
-        expect(t(now, '%X')).to.equal(now.toLocaleTimeString());
-    });
-    it('should format %y as 2-digit year', function() {
-        expect(t(now, '%y')).to.equal('16');
-    });
-    it('should format %z as time zone', function() {
-        expect(t(now, '%z')).to.equal('+0800');
-    });
-    it('should escape %% as %', function() {
-        expect(t(now, '%%')).to.equal('%');
-    });
-});
+  it('should format UTC datetime', function () {
+    expect(t(now, '%Y-%m-%dT%H:%M:%S')).to.equal('2016-01-04T13:15:23')
+  })
+  it('should format %A as Monday', function () {
+    expect(t(now, '%A')).to.equal('Monday')
+  })
+  it('should format %B as month name', function () {
+    expect(t(now, '%B')).to.equal('January')
+  })
+  it('should format %C as century', function () {
+    expect(t(now, '%C')).to.equal('20')
+  })
+  it('should format %c as local string', function () {
+    expect(t(now, '%c')).to.equal(now.toLocaleString())
+  })
+  it('should format %e as space padded date', function () {
+    expect(t(now, '%e')).to.equal(' 4')
+  })
+  it('should format %I as 0 padded hour12', function () {
+    expect(t(now, '%I')).to.equal('01')
+  })
+  it('should format %I as 12 for 00:00', function () {
+    var date = new Date('2016-01-01T00:00:00.000Z')
+    expect(t(date, '%I')).to.equal('12')
+  })
+  describe('%j', function () {
+    it('should format %j as day of year', function () {
+      expect(t(then, '%j')).to.equal('066')
+    })
+    it('should take count of leap years', function () {
+      var date = new Date('2001-03-01')
+      expect(t(date, '%j')).to.equal('060')
+    })
+    it('should take count of leap years', function () {
+      var date = new Date('2000-03-01')
+      expect(t(date, '%j')).to.equal('061')
+    })
+  })
+  it('should format %k as space padded hour', function () {
+    expect(t(then, '%k')).to.equal(' 3')
+  })
+  it('should format %l as space padded hour12', function () {
+    expect(t(now, '%l')).to.equal(' 1')
+  })
+  it('should format %l as 12 for 00:00', function () {
+    var date = new Date('2016-01-01T00:00:00.000Z')
+    expect(t(date, '%l')).to.equal('12')
+  })
+  it('should format %L as 0 padded millisecond', function () {
+    expect(t(then, '%L')).to.equal('000')
+  })
+  it('should format %p as upper cased am/pm', function () {
+    expect(t(now, '%p')).to.equal('PM')
+    expect(t(then, '%p')).to.equal('AM')
+  })
+  it('should format %P as lower cased am/pm', function () {
+    expect(t(now, '%P')).to.equal('pm')
+    expect(t(then, '%P')).to.equal('am')
+  })
+  it('should format %q as date suffix', function () {
+    var st = new Date('2016-03-01T03:05:03.000Z')
+    var nd = new Date('2016-03-02T03:05:03.000Z')
+    var rd = new Date('2016-03-03T03:05:03.000Z')
+    expect(t(st, '%q')).to.equal('st')
+    expect(t(nd, '%q')).to.equal('nd')
+    expect(t(rd, '%q')).to.equal('rd')
+    expect(t(now, '%q')).to.equal('th')
+  })
+  it('should format %s as UNIX seconds', function () {
+    expect(t(now, '%s')).to.be.match(/\d+/)
+  })
+  it('should format %u as day of week(1-7)', function () {
+    expect(t(now, '%u')).to.be.equal('1')
+    expect(t(then, '%u')).to.be.equal('7')
+  })
+  it('should format %U as week of year, starts with 0', function () {
+    expect(t(now, '%U')).to.equal('01')
+  })
+  it('should format %w as day of month(0-7)', function () {
+    expect(t(now, '%w')).to.be.equal('1')
+    expect(t(then, '%w')).to.be.equal('0')
+  })
+  it('should format %W as week of year, starts with 1', function () {
+    expect(t(now, '%W')).to.be.equal('01')
+  })
+  it('should format %x as local date string', function () {
+    expect(t(now, '%x')).to.equal(now.toLocaleDateString())
+  })
+  it('should format %X as local time string', function () {
+    expect(t(now, '%X')).to.equal(now.toLocaleTimeString())
+  })
+  it('should format %y as 2-digit year', function () {
+    expect(t(now, '%y')).to.equal('16')
+  })
+  it('should format %z as time zone', function () {
+    expect(t(now, '%z')).to.equal('+0800')
+  })
+  it('should format %z as negative time zone', function () {
+    var date = new Date('2016-01-04T13:15:23.000Z')
+    date.getTimezoneOffset = () => 480
+    expect(t(date, '%z')).to.equal('-0800')
+  })
+  it('should escape %% as %', function () {
+    expect(t(now, '%%')).to.equal('%')
+  })
+  it('should retain un-recognized formaters', function () {
+    expect(t(now, '%o')).to.equal('%o')
+  })
+})
 
+function mockUTC () {
+  var p = Date.prototype
 
-function mockUTC() {
-    var p = Date.prototype;
+  p._getHours = p.getHours
+  p.getHours = p.getUTCHours
 
-    p._getHours = p.getHours;
-    p.getHours = p.getUTCHours;
+  p._getDays = p.getDays
+  p.getDays = p.getUTCDays
 
-    p._getDays = p.getDays;
-    p.getDays = p.getUTCDays;
-
-    p._getTimezoneOffset = p._getTimezoneOffset;
-    p.getTimezoneOffset = () => -480;
+  p._getTimezoneOffset = p._getTimezoneOffset
+  p.getTimezoneOffset = () => -480
 }
 
-function restoreUTC() {
-    var p = Date.prototype;
-    p.getHours = p._getHours;
-    p.getDays = p._getDays;
-    p.getTimezoneOffset = p._getTimezoneOffset;
+function restoreUTC () {
+  var p = Date.prototype
+  p.getHours = p._getHours
+  p.getDays = p._getDays
+  p.getTimezoneOffset = p._getTimezoneOffset
 }

test/util/underscore.js

@@ -1,128 +1,128 @@
-const chai = require("chai");
-const sinon = require('sinon');
-const expect = chai.expect;
-const Errors = require('../../src/util/error.js');
-chai.use(require("sinon-chai"));
+const chai = require('chai')
+const sinon = require('sinon')
+const expect = chai.expect
+const Errors = require('../../src/util/error.js')
+chai.use(require('sinon-chai'))
 
-var _ = require('../../src/util/underscore.js');
+var _ = require('../../src/util/underscore.js')
 
-describe('util/underscore', function() {
-    describe('.isError()', function() {
-        it('should return true for new Error', function() {
-            expect(_.isError(new Error())).to.be.true;
-        });
-        it('should return true for RenderError', function() {
-            var tpl = {
-                token: {
-                    input: 'xx'
-                }
-            };
-            expect(_.isError(new Errors.RenderError(new Error(), tpl))).to.be.true;
-        });
-        it('should return true for RenderBreakError', function() {
-            expect(_.isError(new Errors.RenderBreakError())).to.be.true;
-        });
-    });
-    describe('.isString()', function() {
-        it('should return true for literal string', function() {
-            expect(_.isString('foo')).to.be.true;
-        });
-        it('should return true String instance', function() {
-            expect(_.isString(String('foo'))).to.be.true;
-        });
-        it('should return false for 123 ', function() {
-            expect(_.isString(123)).to.be.false;
-        });
-    });
-    describe('.forOwn()', function() {
-        it('should iterate all properties', function() {
-            var spy = sinon.spy();
-            var obj = {
-                foo: "bar"
-            };
-            _.forOwn(obj, spy);
-            expect(spy).to.have.been.calledWith('bar', 'foo', obj);
-        });
-        it('should not iterate over properties on prototype', function() {
-            var spy = sinon.spy();
-            var obj = Object.create({
-                bar: 'foo'
-            });
-            obj.foo = 'bar';
-            _.forOwn(obj, spy);
-            expect(spy).to.have.been.calledOnce;
-            expect(spy).to.have.been.calledWith('bar', 'foo', obj);
-        });
-        it('should break when returned false', function() {
-            var spy = sinon.stub().returns(false);
-            _.forOwn({
-                'foo': 'foo',
-                'bar': 'foo'
-            }, spy);
-            expect(spy).to.have.been.calledOnce;
-        });
-    });
-    describe('.isArray()', function() {
-        it('should return true for []', function() {
-            expect(_.isArray([])).to.be.true;
-        });
-        it('should return false for "foo"', function() {
-            expect(_.isArray("foo")).to.be.false;
-        });
-    });
-    describe('.echo()', function() {
-        it('should be transparent', function() {
-            expect(_.echo('foo')('bar')).to.equal('bar');
-        });
-        it('should log the arguments', function() {
-            var log = sinon.spy(console, 'log');
-            _.echo('foo')('bar');
-            expect(log).to.have.been.calledWith('[foo]', 'bar');
-        });
-    });
-    describe('.assign()', function() {
-        it('should handle null dst', function() {
-            expect(_.assign(null, {
-                foo: 'bar'
-            })).to.deep.equal({
-                foo: 'bar'
-            });
-        });
-        it('should assign 2 objects', function() {
-            var src = {
-                foo: 'foo',
-                bar: 'bar'
-            };
-            var dst = {
-                foo: 'bar',
-                kaa: 'kaa'
-            };
-            expect(_.assign(dst, src)).to.deep.equal({
-                foo: 'foo',
-                bar: 'bar',
-                kaa: 'kaa'
-            });
-        });
-        it('should assign 3 objects', function() {
-            expect(_.assign({
-                foo: 'foo'
-            }, {
-                bar: 'bar'
-            }, {
-                car: 'car'
-            })).to.deep.equal({
-                foo: 'foo',
-                bar: 'bar',
-                car: 'car'
-            });
-        });
-    });
-    describe('.uniq()', function() {
-        it('should handle empty array', function() {
-            expect(_.uniq([])).to.deep.equal([]);
-        });
-        it('should do uniq', function() {
-            expect(_.uniq([1, 'a', 'a', 1])).to.deep.equal([1, 'a']);
-        });
-    });
-});
+describe('util/underscore', function () {
+  describe('.isError()', function () {
+    it('should return true for new Error', function () {
+      expect(_.isError(new Error())).to.be.true
+    })
+    it('should return true for RenderError', function () {
+      var tpl = {
+        token: {
+          input: 'xx'
+        }
+      }
+      expect(_.isError(new Errors.RenderError(new Error(), tpl))).to.be.true
+    })
+    it('should return true for RenderBreakError', function () {
+      expect(_.isError(new Errors.RenderBreakError())).to.be.true
+    })
+  })
+  describe('.isString()', function () {
+    it('should return true for literal string', function () {
+      expect(_.isString('foo')).to.be.true
+    })
+    it('should return true String instance', function () {
+      expect(_.isString(String('foo'))).to.be.true
+    })
+    it('should return false for 123 ', function () {
+      expect(_.isString(123)).to.be.false
+    })
+  })
+  describe('.forOwn()', function () {
+    it('should iterate all properties', function () {
+      var spy = sinon.spy()
+      var obj = {
+        foo: 'bar'
+      }
+      _.forOwn(obj, spy)
+      expect(spy).to.have.been.calledWith('bar', 'foo', obj)
+    })
+    it('should not iterate over properties on prototype', function () {
+      var spy = sinon.spy()
+      var obj = Object.create({
+        bar: 'foo'
+      })
+      obj.foo = 'bar'
+      _.forOwn(obj, spy)
+      expect(spy).to.have.been.calledOnce
+      expect(spy).to.have.been.calledWith('bar', 'foo', obj)
+    })
+    it('should break when returned false', function () {
+      var spy = sinon.stub().returns(false)
+      _.forOwn({
+        'foo': 'foo',
+        'bar': 'foo'
+      }, spy)
+      expect(spy).to.have.been.calledOnce
+    })
+  })
+  describe('.echo()', function () {
+    it('should be transparent', function () {
+      expect(_.echo('foo')('bar')).to.equal('bar')
+    })
+    it('should log the arguments', function () {
+      var log = sinon.spy(console, 'log')
+      _.echo('foo')('bar')
+      expect(log).to.have.been.calledWith('[foo]', 'bar')
+    })
+  })
+  describe('.range()', function () {
+    it('should return a range of integers', function () {
+      expect(_.range(3, 5)).to.deep.equal([3, 4])
+    })
+    it('should treat start as 0 if omitted', function () {
+      expect(_.range(3)).to.deep.equal([0, 1, 2])
+    })
+  })
+  describe('.assign()', function () {
+    it('should handle null dst', function () {
+      expect(_.assign(null, {
+        foo: 'bar'
+      })).to.deep.equal({
+        foo: 'bar'
+      })
+    })
+    it('should assign 2 objects', function () {
+      var src = {
+        foo: 'foo',
+        bar: 'bar'
+      }
+      var dst = {
+        foo: 'bar',
+        kaa: 'kaa'
+      }
+      expect(_.assign(dst, src)).to.deep.equal({
+        foo: 'foo',
+        bar: 'bar',
+        kaa: 'kaa'
+      })
+    })
+    it('should assign 3 objects', function () {
+      expect(_.assign({
+        foo: 'foo'
+      }, {
+        bar: 'bar'
+      }, {
+        car: 'car'
+      })).to.deep.equal({
+        foo: 'foo',
+        bar: 'bar',
+        car: 'car'
+      })
+    })
+  })
+  describe('.uniq()', function () {
+    it('should handle empty array', function () {
+      expect(_.uniq([])).to.deep.equal([])
+    })
+    it('should do uniq', function () {
+      expect(_.uniq([1, 'a', 'a', 1])).to.deep.equal([1, 'a'])
+    })
+  })
+})