Got first test working in async - nested includes

index.js

@@ -12,6 +12,7 @@ const Template = require('./src/parser');
 const Expression = require('./src/expression.js');
 const tags = require('./tags');
 const filters = require('./filters');
+const Promise = require("bluebird");
 
 var _engine = {
     init: function(tag, filter, options) {
@@ -43,8 +44,14 @@ var _engine = {
     },
     renderFile: function(filepath, ctx) {
         try{
-            var tpl = this.handleCache(filepath);
-            return this.render(tpl, ctx);
+            return this.handleCache(filepath)
+                .then((templates) => {
+                    return this.render(templates, ctx);
+                })
+                .catch((e) => {
+                    e.file = filepath;
+                    throw e;
+                });
         }
         catch(e){
             e.file = filepath;
@@ -67,9 +74,16 @@ var _engine = {
         if (path.extname(filepath) === '') {
             filepath += this.options.extname;
         }
-        var tpl = this.options.cache && this.cache[filepath] ||
-            this.parse(fs.readFileSync(filepath, 'utf8'));
-        return this.options.cache ? (this.cache[filepath] = tpl) : tpl;
+
+        return this.getTemplate(filepath)
+            .then((html) => {
+                var tpl = this.options.cache && this.cache[filepath] || this.parse(html);
+                return this.options.cache ? (this.cache[filepath] = tpl) : tpl;
+            });
+    },
+    getTemplate: function(filepath) {
+        var html = fs.readFileSync(filepath, 'utf8');
+        return Promise.resolve(html);
     },
     express: function() {
         return (filePath, options, callback) => {

package.json

@@ -23,11 +23,13 @@
   },
   "homepage": "https://github.com/harttle/shopify-liquid#readme",
   "dependencies": {
+    "bluebird": "^3.4.3",
     "lodash": "^4.13.1",
     "strftime": "^0.9.2"
   },
   "devDependencies": {
     "chai": "^3.5.0",
+    "chai-as-promised": "^5.3.0",
     "coveralls": "^2.11.9",
     "express": "^4.14.0",
     "istanbul": "^0.4.3",

src/render.js

@@ -1,30 +1,38 @@
 const error = require('./error.js');
 const Exp = require('./expression.js');
 const assert = require('assert');
+const Promise = require("bluebird");
 
 var render = {
 
     renderTemplates: function(templates, scope) {
         assert(scope, 'unable to evalTemplates: scope undefined');
-        var html = '',
-            partial;
-        templates.some(template => {
+        var htmlBlocks = [],
+            partial,
+            promises = [];
+        templates.some((template, index) => {
             if (scope.get('forloop.skip')) return true;
             switch (template.type) {
                 case 'tag':
-                    partial = this.renderTag(template, scope, this.register);
-                    if (partial === undefined) return true;
-                    html += partial;
+                    promises.push(this.renderTag(template, scope, this.register)
+                        .then((partial) => {
+                            if (partial === undefined) return true;
+                            return htmlBlocks[index] = partial;
+                        }));
                     break;
                 case 'html':
-                    html += template.value;
+                    promises.push(Promise.resolve(htmlBlocks[index] = template.value));
                     break;
                 case 'output':
                     var val = this.evalOutput(template, scope);
-                    html += val === undefined ? '' : stringify(val);
+                    htmlBlocks[index] = val === undefined ? '' : stringify(val);
+                    promises.push(Promise.resolve(htmlBlocks[index]));
             }
         });
-        return html;
+        return Promise.all(promises)
+            .then((results) => {
+                return htmlBlocks.join('');
+            });
     },
 
     renderTag: function(template, scope, register) {

tags/include.js

@@ -1,4 +1,5 @@
 var Liquid = require('..');
+var Promise = require("bluebird");
 var lexical = Liquid.lexical;
 var withRE = new RegExp(`with\\s+(${lexical.value.source})`);
 
@@ -20,11 +21,16 @@ module.exports = function(liquid) {
             if(this.with){
                 hash[filepath] = Liquid.evalValue(this.with, scope);
             }
-            var tpl = liquid.handleCache(filepath);
-            scope.push(hash);
-            var html = liquid.renderer.renderTemplates(tpl, scope);
-            scope.pop();
-            return html;
+            return liquid.handleCache(filepath)
+                .then((templates) => {
+                    scope.push(hash);
+                    return liquid.renderer.renderTemplates(templates, scope);
+                })
+                .then((html) => {
+                    scope.pop();
+                    return html;
+                });
+
         }
     });
 

test/tags.js

@@ -1,7 +1,9 @@
 const chai = require("chai");
+const should = chai.should();
 const expect = chai.expect;
 const Liquid = require('..');
 const mock = require('mock-fs');
+chai.use(require("chai-as-promised"));
 var liquid = Liquid({
         root: '/',
         extname: '.html'
@@ -28,7 +30,14 @@ describe('tags', function() {
             foo: 'bar',
             arr: [-2, 'a'],
             alpha: ['a', 'b', 'c'],
-            emptyArray: []
+            emptyArray: [],
+            person: {
+                firstName: 'Joe',
+                lastName: 'Shmoe',
+                address: {
+                    city: 'Dallas'
+                }
+            }
         };
         mock({
             '/default-layout.html': 'foo{% block %}Default{% endblock %}foo',
@@ -42,7 +51,10 @@ describe('tags', function() {
             '/color.html': 'color:{{color}}, shape:{{shape}}',
             '/with.html': '{% include "color" with "red", shape: "rect" %}',
             '/scope.html': '{% assign shape="triangle" %}{% assign color="yellow" %}{% include "color.html" %}',
-            '/hash.html': '{% assign name="harttle" %}{% include "user.html", role: "admin", alias: name %}'
+            '/hash.html': '{% assign name="harttle" %}{% include "user.html", role: "admin", alias: name %}',
+            '/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}}'
         });
     });
     afterEach(function() {
@@ -266,6 +278,12 @@ describe('tags', function() {
         var dst = 'color:red, shape:rect';
         expect(liquid.renderFile(filepath, ctx)).to.equal(dst);
     });
+
+    it.only('should support nested includes', function() {
+        //expect(liquid.renderFile('personInfo.html', ctx)).to.equal('This is a person <p>Joe Shmoe<br/>City: Dallas</p>');
+        return liquid.renderFile('personInfo.html', ctx).should.eventually.equal('This is a person <p>Joe Shmoe<br/>City: Dallas</p>')
+    });
+
     it('should throw when block not closed', function() {
         src = '{% layout "default-layout" %}{%block%}bar';
         testThrow(src, /tag {%block%} not closed/);