Refactor the Optimizer class no visit the AST

Just takes care of Variables for now.

Increases performance.

.github/workflows/liquid.yml

@@ -1,39 +0,0 @@
-name: Liquid
-on: [push, pull_request]
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        entry:
-          - { ruby: 2.5, allowed-failure: false } # minimum supported
-          - { ruby: 3.1, allowed-failure: false } # latest
-          - { ruby: ruby-head, allowed-failure: true }
-    name: test (${{ matrix.entry.ruby }})
-    steps:
-      - uses: actions/checkout@v2
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: ${{ matrix.entry.ruby }}
-      - uses: actions/cache@v1
-        with:
-          path: vendor/bundle
-          key: ${{ runner.os }}-gems-${{ hashFiles('Gemfile') }}
-          restore-keys: ${{ runner.os }}-gems-
-      - run: bundle install --jobs=3 --retry=3 --path=vendor/bundle
-      - run: bundle exec rake
-        continue-on-error: ${{ matrix.entry.allowed-failure }}
-  memory_profile:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: 2.7
-      - uses: actions/cache@v1
-        with:
-          path: vendor/bundle
-          key: ${{ runner.os }}-gems-${{ hashFiles('Gemfile') }}
-          restore-keys: ${{ runner.os }}-gems-
-      - run: bundle install --jobs=3 --retry=3 --path=vendor/bundle
-      - run: bundle exec rake memory_profile:run

.rubocop.yml

@@ -1,7 +1,5 @@
-inherit_gem:
-  rubocop-shopify: rubocop.yml
-
 inherit_from:
+  - 'https://shopify.github.io/ruby-style-guide/rubocop.yml'
   - .rubocop_todo.yml
 
 require: rubocop-performance
@@ -10,15 +8,10 @@ Performance:
   Enabled: true
 
 AllCops:
-  TargetRubyVersion: 2.5
-  NewCops: disable
+  TargetRubyVersion: 2.4
   Exclude:
     - 'vendor/bundle/**/*'
 
 Naming/MethodName:
   Exclude:
     - 'example/server/liquid_servlet.rb'
-
-# Backport https://github.com/Shopify/ruby-style-guide/pull/258
-Layout/BeginEndAlignment:
-  Enabled: true

.rubocop_todo.yml

@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2020-12-11 18:53:41 UTC using RuboCop version 1.6.1.
+# on 2019-09-11 06:34:25 +1000 using RuboCop version 0.74.0.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -14,26 +14,14 @@ Lint/InheritException:
   Exclude:
     - 'lib/liquid/interrupts.rb'
 
-# Offense count: 113
+# Offense count: 98
 # Cop supports --auto-correct.
 # Configuration parameters: AutoCorrect, AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
 # URISchemes: http, https
 Layout/LineLength:
-  Max: 260
+  Max: 294
 
-# Offense count: 8
-Lint/MissingSuper:
-  Exclude:
-    - 'lib/liquid/forloop_drop.rb'
-    - 'lib/liquid/tablerowloop_drop.rb'
-    - 'test/integration/assign_test.rb'
-    - 'test/integration/context_test.rb'
-    - 'test/integration/filter_test.rb'
-    - 'test/integration/standard_filter_test.rb'
-    - 'test/integration/tags/for_tag_test.rb'
-    - 'test/integration/tags/table_row_test.rb'
-
-# Offense count: 43
+# Offense count: 44
 Naming/ConstantName:
   Exclude:
     - 'lib/liquid.rb'
@@ -44,6 +32,7 @@ Naming/ConstantName:
     - 'lib/liquid/tags/cycle.rb'
     - 'lib/liquid/tags/for.rb'
     - 'lib/liquid/tags/if.rb'
+    - 'lib/liquid/tags/include.rb'
     - 'lib/liquid/tags/raw.rb'
     - 'lib/liquid/tags/table_row.rb'
     - 'lib/liquid/variable.rb'
@@ -51,7 +40,9 @@ Naming/ConstantName:
     - 'performance/shopify/paginate.rb'
     - 'test/integration/tags/include_tag_test.rb'
 
-# Offense count: 2
+# Offense count: 5
 Style/ClassVars:
   Exclude:
     - 'lib/liquid/condition.rb'
+    - 'lib/liquid/strainer.rb'
+    - 'lib/liquid/template.rb'

.travis.yml

@@ -0,0 +1,26 @@
+language: ruby
+cache: bundler
+
+rvm:
+  - 2.4
+  - 2.5
+  - 2.6
+  - &latest_ruby 2.7
+  - ruby-head
+
+matrix:
+  include:
+    - rvm: *latest_ruby
+      script: bundle exec rake memory_profile:run
+      name: Profiling Memory Usage
+  allow_failures:
+    - rvm: ruby-head
+
+branches:
+  only:
+    - master
+    - gh-pages
+    - /.*-stable/
+
+notifications:
+  disable: true

CONTRIBUTING.md

@@ -5,7 +5,6 @@
 * Bugfixes
 * Performance improvements
 * Features that are likely to be useful to the majority of Liquid users
-* Documentation updates that are concise and likely to be useful to the majority of Liquid users
 
 ## Things we won't merge
 
@@ -15,14 +14,12 @@
 * Features that can easily be implemented on top of Liquid (for example as a custom filter or custom filesystem)
 * Code that does not include tests
 * Code that breaks existing tests
-* Documentation changes that are verbose, incorrect or not important to most people (we want to keep it simple and easy to understand)
 
 ## Workflow
 
-* [Sign the CLA](https://cla.shopify.com/) if you haven't already
 * Fork the Liquid repository
 * Create a new branch in your fork
-  * For updating [Liquid documentation](https://shopify.github.io/liquid/), create it from `gh-pages` branch. (You can skip tests.)
 * If it makes sense, add tests for your code and/or run a performance benchmark
 * Make sure all tests pass (`bundle exec rake`)
 * Create a pull request
+

Gemfile

@@ -18,8 +18,7 @@ group :benchmark, :test do
 end
 
 group :test do
-  gem 'rubocop', '~> 1.4', require: false
-  gem 'rubocop-shopify', '~> 1.0.7', require: false
+  gem 'rubocop', '~> 0.78.0', require: false
   gem 'rubocop-performance', require: false
 
   platform :mri, :truffleruby do

History.md

@@ -1,76 +1,10 @@
 # Liquid Change Log
 
-## 5.3.0 (unreleased)
+### Unreleased
 
-### Fixes
-* StandardFilter: Fix missing @context on iterations (#1525) [Thierry Joyal]
-
-### Deprecation
-* Condition#evaluate to require mandatory context argument in Liquid 6.0.0 (#1527) [Thierry Joyal]
-
-## 5.2.0 2022-03-01
-
-### Features
-* Add `remove_last`, and `replace_last` filters (#1422) [Anders Hagbard]
-* Eagerly cache global filters (#1524) [Jean Boussier]
-
-### Fixes
-* Fix some internal errors in filters from invalid input (#1476) [Dylan Thacker-Smith]
-* Allow dash in filter kwarg name for consistency with Liquid::C (#1518) [CP Clermont]
-
-## 5.1.0 / 2021-09-09
-
-### Features
-* Add `base64_encode`, `base64_decode`, `base64_url_safe_encode`, and `base64_url_safe_decode` filters (#1450) [Daniel Insley]
-* Introduce `to_liquid_value` in `Liquid::Drop` (#1441) [Michael Go]
-
-### Fixes
-* Fix support for using a String subclass for the liquid source (#1421) [Dylan Thacker-Smith]
-* Add `ParseTreeVisitor` to `RangeLookup` (#1470) [CP Clermont]
-* Translate `RangeError` to `Liquid::Error` for `truncatewords` with large int (#1431) [Dylan Thacker-Smith]
-
-## 5.0.1 / 2021-03-24
-
-### Fixes
-* Add ParseTreeVisitor to Echo tag (#1414) [CP Clermont]
-* Test with ruby 3.0 as the latest ruby version (#1398) [Dylan Thacker-Smith]
-* Handle carriage return in newlines_to_br (#1391) [Unending]
-
-### Performance Improvements
-* Use split limit in truncatewords (#1361) [Dylan Thacker-Smith]
-
-## 5.0.0 / 2021-01-06
-
-### Features
-* Add new `{% render %}` tag (#1122) [Samuel Doiron]
-* Add support for `as` in `{% render %}` and `{% include %}` (#1181) [Mike Angell]
-* Add `{% liquid %}` and `{% echo %}` tags (#1086) [Justin Li]
-* Add [usage tracking](README.md#usage-tracking) [Mike Angell]
-* Add `Tag.disable_tags` for disabling tags that prepend `Tag::Disableable` at render time (#1162, #1274, #1275) [Mike Angell]
-* Support using a profiler for multiple renders (#1365, #1366) [Dylan Thacker-Smith]
-
-### Fixes
-* Fix catastrophic backtracking in `RANGES_REGEX` regular expression (#1357) [Dylan Thacker-Smith]
-* Make sure the for tag's limit and offset are integers (#1094) [David Cornu]
-* Invokable methods for enumerable reject include (#1151) [Thierry Joyal]
-* Allow `default` filter to handle `false` as value (#1144) [Mike Angell]
-* Fix render length resource limit so it doesn't multiply nested output (#1285) [Dylan Thacker-Smith]
-* Fix duplication of text in raw tags (#1304) [Peter Zhu]
-* Fix strict parsing of find variable with a name expression (#1317) [Dylan Thacker-Smith]
-* Use monotonic time to measure durations in Liquid::Profiler (#1362) [Dylan Thacker-Smith]
-
-### Breaking Changes
-* Require Ruby >= 2.5 (#1131, #1310) [Mike Angell, Dylan Thacker-Smith]
-* Remove support for taint checking (#1268) [Dylan Thacker-Smith]
-* Split Strainer class into StrainerFactory and StrainerTemplate (#1208) [Thierry Joyal]
+* Split Strainer class as a factory and a template (#1208) [Thierry Joyal]
 * Remove handling of a nil context in the Strainer class (#1218) [Thierry Joyal]
-* Handle `BlockBody#blank?` at parse time (#1287) [Dylan Thacker-Smith]
-* Pass the tag markup and tokenizer to `Document#unknown_tag` (#1290) [Dylan Thacker-Smith]
-* And several internal changes
-
-### Performance Improvements
-* Reduce allocations (#1073, #1091, #1115, #1099, #1117, #1141, #1322, #1341) [Richard Monette, Florian Weingarten, Ashwin Maroli]
-* Improve resources limits performance (#1093, #1323) [Florian Weingarten, Dylan Thacker-Smith]
+* StaticRegisters#fetch to raise on missing key (#1250) [Thierry Joyal]
 
 ## 4.0.3 / 2019-03-12
 

README.md

@@ -5,7 +5,7 @@
 
 * [Contributing guidelines](CONTRIBUTING.md)
 * [Version history](History.md)
-* [Liquid documentation from Shopify](https://shopify.dev/api/liquid)
+* [Liquid documentation from Shopify](http://docs.shopify.com/themes/liquid-basics)
 * [Liquid Wiki at GitHub](https://github.com/Shopify/liquid/wiki)
 * [Website](http://liquidmarkup.org/)
 
@@ -56,7 +56,7 @@ For standard use you can just pass it the content of a file and call render with
 
 Setting the error mode of Liquid lets you specify how strictly you want your templates to be interpreted.
 Normally the parser is very lax and will accept almost anything without error. Unfortunately this can make
-it very hard to debug and can lead to unexpected behaviour.
+it very hard to debug and can lead to unexpected behaviour. 
 
 Liquid also comes with a stricter parser that can be used when editing templates to give better error messages
 when templates are invalid. You can enable this new parser like this:

Rakefile

@@ -9,17 +9,11 @@ task(default: [:test, :rubocop])
 
 desc('run test suite with default parser')
 Rake::TestTask.new(:base_test) do |t|
-  t.libs << 'lib' << 'test'
+  t.libs << '.' << 'lib' << 'test'
   t.test_files = FileList['test/{integration,unit}/**/*_test.rb']
   t.verbose    = false
 end
 
-Rake::TestTask.new(:integration_test) do |t|
-  t.libs << 'lib' << 'test'
-  t.test_files = FileList['test/integration/**/*_test.rb']
-  t.verbose    = false
-end
-
 desc('run test suite with warn error mode')
 task :warn_test do
   ENV['LIQUID_PARSER_MODE'] = 'warn'
@@ -46,12 +40,12 @@ task :test do
     ENV['LIQUID_C'] = '1'
 
     ENV['LIQUID_PARSER_MODE'] = 'lax'
-    Rake::Task['integration_test'].reenable
-    Rake::Task['integration_test'].invoke
+    Rake::Task['base_test'].reenable
+    Rake::Task['base_test'].invoke
 
     ENV['LIQUID_PARSER_MODE'] = 'strict'
-    Rake::Task['integration_test'].reenable
-    Rake::Task['integration_test'].invoke
+    Rake::Task['base_test'].reenable
+    Rake::Task['base_test'].invoke
   end
 end
 

lib/liquid.rb

@@ -36,14 +36,12 @@ module Liquid
   VariableIncompleteEnd       = /\}\}?/
   QuotedString                = /"[^"]*"|'[^']*'/
   QuotedFragment              = /#{QuotedString}|(?:[^\s,\|'"]|#{QuotedString})+/o
-  TagAttributes               = /(\w[\w-]*)\s*\:\s*(#{QuotedFragment})/o
+  TagAttributes               = /(\w+)\s*\:\s*(#{QuotedFragment})/o
   AnyStartingTag              = /#{TagStart}|#{VariableStart}/o
   PartialTemplateParser       = /#{TagStart}.*?#{TagEnd}|#{VariableStart}.*?#{VariableIncompleteEnd}/om
   TemplateParser              = /(#{PartialTemplateParser}|#{AnyStartingTag})/om
   VariableParser              = /\[[^\]]+\]|#{VariableSegment}+\??/o
 
-  RAISE_EXCEPTION_LAMBDA = ->(_e) { raise }
-
   singleton_class.send(:attr_accessor, :cache_classes)
   self.cache_classes = true
 end
@@ -59,8 +57,8 @@ require 'liquid/forloop_drop'
 require 'liquid/extensions'
 require 'liquid/errors'
 require 'liquid/interrupts'
-require 'liquid/strainer_template'
 require 'liquid/strainer_factory'
+require 'liquid/strainer_template'
 require 'liquid/expression'
 require 'liquid/context'
 require 'liquid/parser_switching'
@@ -86,6 +84,7 @@ require 'liquid/usage'
 require 'liquid/register'
 require 'liquid/static_registers'
 require 'liquid/template_factory'
+require 'liquid/optimizer'
 
 # Load all the tags of the standard library
 #

lib/liquid/block.rb

@@ -13,7 +13,6 @@ module Liquid
       @body = new_body
       while parse_body(@body, tokens)
       end
-      @body.freeze
     end
 
     # For backwards compatibility

lib/liquid/block_body.rb

@@ -19,8 +19,6 @@ module Liquid
     end
 
     def parse(tokenizer, parse_context, &block)
-      raise FrozenError, "can't modify frozen Liquid::BlockBody" if frozen?
-
       parse_context.line_number = tokenizer.line_number
 
       if tokenizer.for_liquid_tag
@@ -30,23 +28,6 @@ module Liquid
       end
     end
 
-    def freeze
-      @nodelist.freeze
-      super
-    end
-
-    # @public_docs
-    # @type tag
-    # @category theme
-    # @title liquid
-    # @summary
-    #   Allows you to write multiple tags within one set of delimiters.
-    # @description
-    #   Use the [`echo`](/api/liquid/tags/theme-tags#echo) tag to output an expression within a `liquid` tag.
-    # @syntax
-    #   {% liquid
-    #     statement
-    #   %}
     private def parse_for_liquid_tag(tokenizer, parse_context)
       while (token = tokenizer.shift)
         unless token.empty? || token =~ WhitespaceOrNothing
@@ -111,9 +92,7 @@ module Liquid
     end
 
     private def parse_liquid_tag(markup, parse_context)
-      liquid_tag_tokenizer = parse_context.new_tokenizer(
-        markup, start_line_number: parse_context.line_number, for_liquid_tag: true
-      )
+      liquid_tag_tokenizer = Tokenizer.new(markup, line_number: parse_context.line_number, for_liquid_tag: true)
       parse_for_liquid_tag(liquid_tag_tokenizer, parse_context) do |end_tag_name, _end_tag_markup|
         if end_tag_name
           BlockBody.unknown_tag_in_liquid_tag(end_tag_name, parse_context)
@@ -213,8 +192,6 @@ module Liquid
     end
 
     def render_to_output_buffer(context, output)
-      freeze unless frozen?
-
       context.resource_limits.increment_render_score(@nodelist.length)
 
       idx = 0
@@ -243,8 +220,8 @@ module Liquid
     end
 
     def create_variable(token, parse_context)
-      if token =~ ContentOfVariable
-        markup = Regexp.last_match(1)
+      token.scan(ContentOfVariable) do |content|
+        markup = content.first
         return Variable.new(markup, parse_context)
       end
       BlockBody.raise_missing_variable_terminator(token, parse_context)

lib/liquid/condition.rb

@@ -8,7 +8,7 @@ module Liquid
   #   c = Condition.new(1, '==', 1)
   #   c.evaluate #=> true
   #
-  class Condition # :nodoc:
+  class Condition #:nodoc:
     @@operators = {
       '==' => ->(cond, left, right) {  cond.send(:equal_variables, left, right) },
       '!=' => ->(cond, left, right) { !cond.send(:equal_variables, left, right) },
@@ -45,8 +45,8 @@ module Liquid
       @@operators
     end
 
-    def self.parse_expression(parse_context, markup)
-      @@method_literals[markup] || parse_context.parse_expression(markup)
+    def self.parse_expression(markup)
+      @@method_literals[markup] || Expression.parse(markup)
     end
 
     attr_reader :attachment, :child_condition
@@ -61,7 +61,7 @@ module Liquid
       @child_condition = nil
     end
 
-    def evaluate(context = deprecated_default_context)
+    def evaluate(context = Context.new)
       condition = self
       result = nil
       loop do
@@ -134,8 +134,8 @@ module Liquid
       # return this as the result.
       return context.evaluate(left) if op.nil?
 
-      left  = Liquid::Utils.to_liquid_value(context.evaluate(left))
-      right = Liquid::Utils.to_liquid_value(context.evaluate(right))
+      left  = context.evaluate(left)
+      right = context.evaluate(right)
 
       operation = self.class.operators[op] || raise(Liquid::ArgumentError, "Unknown operator #{op}")
 
@@ -150,12 +150,6 @@ module Liquid
       end
     end
 
-    def deprecated_default_context
-      warn("DEPRECATION WARNING: Condition#evaluate without a context argument is deprecated" \
-        " and will be removed from Liquid 6.0.0.")
-      Context.new
-    end
-
     class ParseTreeVisitor < Liquid::ParseTreeVisitor
       def children
         [

lib/liquid/context.rb

@@ -18,8 +18,8 @@ module Liquid
     attr_accessor :exception_renderer, :template_name, :partial, :global_filter, :strict_variables, :strict_filters
 
     # rubocop:disable Metrics/ParameterLists
-    def self.build(environments: {}, outer_scope: {}, registers: {}, rethrow_errors: false, resource_limits: nil, static_environments: {}, &block)
-      new(environments, outer_scope, registers, rethrow_errors, resource_limits, static_environments, &block)
+    def self.build(environments: {}, outer_scope: {}, registers: {}, rethrow_errors: false, resource_limits: nil, static_environments: {})
+      new(environments, outer_scope, registers, rethrow_errors, resource_limits, static_environments)
     end
 
     def initialize(environments = {}, outer_scope = {}, registers = {}, rethrow_errors = false, resource_limits = nil, static_environments = {})
@@ -41,11 +41,9 @@ module Liquid
 
       self.exception_renderer = Template.default_exception_renderer
       if rethrow_errors
-        self.exception_renderer = Liquid::RAISE_EXCEPTION_LAMBDA
+        self.exception_renderer = ->(_e) { raise }
       end
 
-      yield self if block_given?
-
       # Do this last, since it could result in this object being passed to a Proc in the environment
       squash_instance_assigns_with_environments
     end
@@ -124,7 +122,7 @@ module Liquid
     #      context['var'] = 'hi'
     #   end
     #
-    #   context['var']  #=> nil
+    #   context['var]  #=> nil
     def stack(new_scope = {})
       push(new_scope)
       yield
@@ -137,7 +135,7 @@ module Liquid
     def new_isolated_subcontext
       check_overflow
 
-      self.class.build(
+      Context.build(
         resource_limits: resource_limits,
         static_environments: static_environments,
         registers: StaticRegisters.new(registers)

lib/liquid/document.rb

@@ -22,7 +22,6 @@ module Liquid
     def parse(tokenizer, parse_context)
       while parse_body(tokenizer)
       end
-      @body.freeze
     rescue SyntaxError => e
       e.line_number ||= parse_context.line_number
       raise
@@ -42,7 +41,7 @@ module Liquid
     end
 
     def render(context)
-      render_to_output_buffer(context, +'')
+      @body.render(context)
     end
 
     private

lib/liquid/expression.rb

@@ -10,32 +10,25 @@ module Liquid
       'empty' => ''
     }.freeze
 
+    SINGLE_QUOTED_STRING = /\A'(.*)'\z/m
+    DOUBLE_QUOTED_STRING = /\A"(.*)"\z/m
     INTEGERS_REGEX       = /\A(-?\d+)\z/
     FLOATS_REGEX         = /\A(-?\d[\d\.]+)\z/
-
-    # Use an atomic group (?>...) to avoid pathological backtracing from
-    # malicious input as described in https://github.com/Shopify/liquid/issues/1357
-    RANGES_REGEX         = /\A\(\s*(?>(\S+)\s*\.\.)\s*(\S+)\s*\)\z/
+    RANGES_REGEX         = /\A\((\S+)\.\.(\S+)\)\z/
 
     def self.parse(markup)
-      return nil unless markup
-
-      markup = markup.strip
-      if (markup.start_with?('"') && markup.end_with?('"')) ||
-         (markup.start_with?("'") && markup.end_with?("'"))
-        return markup[1..-2]
-      end
-
-      case markup
-      when INTEGERS_REGEX
-        Regexp.last_match(1).to_i
-      when RANGES_REGEX
-        RangeLookup.parse(Regexp.last_match(1), Regexp.last_match(2))
-      when FLOATS_REGEX
-        Regexp.last_match(1).to_f
+      if LITERALS.key?(markup)
+        LITERALS[markup]
       else
-        if LITERALS.key?(markup)
-          LITERALS[markup]
+        case markup
+        when SINGLE_QUOTED_STRING, DOUBLE_QUOTED_STRING
+          Regexp.last_match(1)
+        when INTEGERS_REGEX
+          Regexp.last_match(1).to_i
+        when RANGES_REGEX
+          RangeLookup.parse(Regexp.last_match(1), Regexp.last_match(2))
+        when FLOATS_REGEX
+          Regexp.last_match(1).to_f
         else
           VariableLookup.parse(markup)
         end

lib/liquid/forloop_drop.rb

@@ -9,12 +9,7 @@ module Liquid
       @index      = 0
     end
 
-    attr_reader :length, :parentloop
-
-    def name
-      Usage.increment('forloop_drop_name')
-      @name
-    end
+    attr_reader :name, :length, :parentloop
 
     def index
       @index + 1

lib/liquid/locales/en.yml

@@ -20,6 +20,7 @@
       tag_termination: "Tag '%{token}' was not properly terminated with regexp: %{tag_end}"
       variable_termination: "Variable '%{token}' was not properly terminated with regexp: %{tag_end}"
       tag_never_closed: "'%{block_name}' tag was never closed"
+      meta_syntax_error: "Liquid syntax error: #{e.message}"
       table_row: "Syntax Error in 'table_row loop' - Valid syntax: table_row [item] in [collection] cols=3"
       render: "Syntax error in tag 'render' - Template name must be a quoted string"
     argument:

lib/liquid/optimizer.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+module Liquid
+  class Optimizer
+    class << self
+      attr_accessor :enabled
+
+      def optimize_variable(node)
+        return unless enabled
+
+        # Turn chained `| append: "..."| append: "..."`, into a single `append_all: [...]`
+        if node.filters.size > 1 && node.filters.all? { |f, _| f == "append" }
+          node.filters = [["append_all", node.filters.map { |f, (arg)| arg }]]
+        end
+      end
+    end
+    self.enabled = true
+  end
+end

lib/liquid/parse_context.rb

@@ -23,14 +23,6 @@ module Liquid
       Liquid::BlockBody.new
     end
 
-    def new_tokenizer(markup, start_line_number: nil, for_liquid_tag: false)
-      Tokenizer.new(markup, line_number: start_line_number, for_liquid_tag: for_liquid_tag)
-    end
-
-    def parse_expression(markup)
-      Expression.parse(markup)
-    end
-
     def partial=(value)
       @partial = value
       @options = value ? partial_options : @template_options

lib/liquid/parser.rb

@@ -46,20 +46,16 @@ module Liquid
       tok[0] == type
     end
 
+    SINGLE_TOKEN_EXPRESSION_TYPES = [:string, :number].freeze
+    private_constant :SINGLE_TOKEN_EXPRESSION_TYPES
+
     def expression
       token = @tokens[@p]
-      case token[0]
-      when :id
-        str = consume
-        str << variable_lookups
-      when :open_square
-        str = consume
-        str << expression
-        str << consume(:close_square)
-        str << variable_lookups
-      when :string, :number
+      if token[0] == :id
+        variable_signature
+      elsif SINGLE_TOKEN_EXPRESSION_TYPES.include?(token[0])
         consume
-      when :open_round
+      elsif token.first == :open_round
         consume
         first = expression
         consume(:dotdot)
@@ -82,19 +78,16 @@ module Liquid
       str
     end
 
-    def variable_lookups
-      str = +""
-      loop do
-        if look(:open_square)
-          str << consume
-          str << expression
-          str << consume(:close_square)
-        elsif look(:dot)
-          str << consume
-          str << consume(:id)
-        else
-          break
-        end
+    def variable_signature
+      str = consume(:id)
+      while look(:open_square)
+        str << consume
+        str << expression
+        str << consume(:close_square)
+      end
+      if look(:dot)
+        str << consume
+        str << variable_signature
       end
       str
     end

lib/liquid/parser_switching.rb

@@ -2,18 +2,6 @@
 
 module Liquid
   module ParserSwitching
-    def strict_parse_with_error_mode_fallback(markup)
-      strict_parse_with_error_context(markup)
-    rescue SyntaxError => e
-      case parse_context.error_mode
-      when :strict
-        raise
-      when :warn
-        parse_context.warnings << e
-      end
-      lax_parse(markup)
-    end
-
     def parse_with_selected_parser(markup)
       case parse_context.error_mode
       when :strict then strict_parse_with_error_context(markup)

lib/liquid/profiler.rb

@@ -25,7 +25,7 @@ module Liquid
   #     node.code
   #
   #     # Which template and line number of this node.
-  #     # The top-level template name is `nil` by default, but can be set in the Liquid::Context before rendering.
+  #     # If top level, this will be "<root>".
   #     node.partial
   #     node.line_number
   #
@@ -46,94 +46,126 @@ module Liquid
     include Enumerable
 
     class Timing
-      attr_reader :code, :template_name, :line_number, :children
-      attr_accessor :total_time
-      alias_method :render_time, :total_time
-      alias_method :partial, :template_name
+      attr_reader :code, :partial, :line_number, :children, :total_time, :self_time
 
-      def initialize(code: nil, template_name: nil, line_number: nil)
-        @code = code
-        @template_name = template_name
-        @line_number = line_number
-        @children = []
+      def initialize(node, partial)
+        @code        = node.respond_to?(:raw) ? node.raw : node
+        @partial     = partial
+        @line_number = node.respond_to?(:line_number) ? node.line_number : nil
+        @children    = []
       end
 
-      def self_time
-        @self_time ||= begin
-          total_children_time = 0.0
+      def self.start(node, partial)
+        new(node, partial).tap(&:start)
+      end
+
+      def start
+        @start_time = Time.now
+      end
+
+      def finish
+        @end_time   = Time.now
+        @total_time = @end_time - @start_time
+
+        if @children.empty?
+          @self_time = @total_time
+        else
+          total_children_time = 0
           @children.each do |child|
             total_children_time += child.total_time
           end
-          @total_time - total_children_time
+          @self_time = @total_time - total_children_time
         end
       end
+
+      def render_time
+        @end_time - @start_time
+      end
     end
 
-    attr_reader :total_time
-    alias_method :total_render_time, :total_time
-
-    def initialize
-      @root_children = []
-      @current_children = nil
-      @total_time = 0.0
-    end
-
-    def profile(template_name, &block)
-      # nested renders are done from a tag that already has a timing node
-      return yield if @current_children
-
-      root_children = @root_children
-      render_idx = root_children.length
-      begin
-        @current_children = root_children
-        profile_node(template_name, &block)
-      ensure
-        @current_children = nil
-        if (timing = root_children[render_idx])
-          @total_time += timing.total_time
-        end
-      end
-    end
-
-    def children
-      children = @root_children
-      if children.length == 1
-        children.first.children
+    def self.profile_node_render(node)
+      if Profiler.current_profile && node.respond_to?(:render)
+        Profiler.current_profile.start_node(node)
+        output = yield
+        Profiler.current_profile.end_node(node)
+        output
       else
-        children
+        yield
       end
     end
 
+    def self.profile_children(template_name)
+      if Profiler.current_profile
+        Profiler.current_profile.push_partial(template_name)
+        output = yield
+        Profiler.current_profile.pop_partial
+        output
+      else
+        yield
+      end
+    end
+
+    def self.current_profile
+      Thread.current[:liquid_profiler]
+    end
+
+    def initialize(partial_name = "<root>")
+      @partial_stack = [partial_name]
+
+      @root_timing  = Timing.new("", current_partial)
+      @timing_stack = [@root_timing]
+
+      @render_start_at = Time.now
+      @render_end_at   = @render_start_at
+    end
+
+    def start
+      Thread.current[:liquid_profiler] = self
+      @render_start_at = Time.now
+    end
+
+    def stop
+      Thread.current[:liquid_profiler] = nil
+      @render_end_at = Time.now
+    end
+
+    def total_render_time
+      @render_end_at - @render_start_at
+    end
+
     def each(&block)
-      children.each(&block)
+      @root_timing.children.each(&block)
     end
 
     def [](idx)
-      children[idx]
+      @root_timing.children[idx]
     end
 
     def length
-      children.length
+      @root_timing.children.length
     end
 
-    def profile_node(template_name, code: nil, line_number: nil)
-      timing = Timing.new(code: code, template_name: template_name, line_number: line_number)
-      parent_children = @current_children
-      start_time = monotonic_time
-      begin
-        @current_children = timing.children
-        yield
-      ensure
-        @current_children = parent_children
-        timing.total_time = monotonic_time - start_time
-        parent_children << timing
-      end
+    def start_node(node)
+      @timing_stack.push(Timing.start(node, current_partial))
     end
 
-    private
+    def end_node(_node)
+      timing = @timing_stack.pop
+      timing.finish
 
-    def monotonic_time
-      Process.clock_gettime(Process::CLOCK_MONOTONIC)
+      @timing_stack.last.children << timing
+    end
+
+    def current_partial
+      @partial_stack.last
+    end
+
+    def push_partial(partial_name)
+      @partial_stack.push(partial_name)
+    end
+
+    def pop_partial
+      @partial_stack.pop
     end
   end
 end

lib/liquid/profiler/hooks.rb

@@ -3,33 +3,19 @@
 module Liquid
   module BlockBodyProfilingHook
     def render_node(context, output, node)
-      if (profiler = context.profiler)
-        profiler.profile_node(context.template_name, code: node.raw, line_number: node.line_number) do
-          super
-        end
-      else
+      Profiler.profile_node_render(node) do
         super
       end
     end
   end
   BlockBody.prepend(BlockBodyProfilingHook)
 
-  module DocumentProfilingHook
+  module IncludeProfilingHook
     def render_to_output_buffer(context, output)
-      return super unless context.profiler
-      context.profiler.profile(context.template_name) { super }
+      Profiler.profile_children(context.evaluate(@template_name_expr).to_s) do
+        super
+      end
     end
   end
-  Document.prepend(DocumentProfilingHook)
-
-  module ContextProfilingHook
-    attr_accessor :profiler
-
-    def new_isolated_subcontext
-      new_context = super
-      new_context.profiler = profiler
-      new_context
-    end
-  end
-  Context.prepend(ContextProfilingHook)
+  Include.prepend(IncludeProfilingHook)
 end

lib/liquid/range_lookup.rb

@@ -12,8 +12,6 @@ module Liquid
       end
     end
 
-    attr_reader :start_obj, :end_obj
-
     def initialize(start_obj, end_obj)
       @start_obj = start_obj
       @end_obj   = end_obj
@@ -37,11 +35,5 @@ module Liquid
         Utils.to_integer(input)
       end
     end
-
-    class ParseTreeVisitor < Liquid::ParseTreeVisitor
-      def children
-        [@node.start_obj, @node.end_obj]
-      end
-    end
   end
 end

lib/liquid/standardfilters.rb

@@ -1,12 +1,10 @@
 # frozen_string_literal: true
 
 require 'cgi'
-require 'base64'
 require 'bigdecimal'
 
 module Liquid
   module StandardFilters
-    MAX_INT = (1 << 31) - 1
     HTML_ESCAPE = {
       '&' => '&amp;',
       '>' => '&gt;',
@@ -28,47 +26,20 @@ module Liquid
     end
 
     # convert an input string to DOWNCASE
-    #
-    # @public_docs
-    # @type filter
-    # @summary Converts a string into lowercase.
-    # @category string
-    # @syntax {{ string | downcase }}
-    # @return string
     def downcase(input)
       input.to_s.downcase
     end
 
     # convert an input string to UPCASE
-    #
-    # @public_docs
-    # @type filter
-    # @summary Converts a string into uppercase.
-    # @category string
-    # @syntax {{ string | upcase }}
-    # @return string
     def upcase(input)
       input.to_s.upcase
     end
 
-    # capitalize words in the input sentence
-    #
-    # @public_docs
-    # @type filter
-    # @summary Capitalizes the first word in a string.
-    # @category string
-    # @syntax {{ string | capitalize }}
-    # @return string
+    # capitalize words in the input centence
     def capitalize(input)
       input.to_s.capitalize
     end
 
-    # @public_docs
-    # @type filter
-    # @summary Escapes a string.
-    # @category string
-    # @syntax {{ string | escape }}
-    # @return string
     def escape(input)
       CGI.escapeHTML(input.to_s) unless input.nil?
     end
@@ -91,53 +62,6 @@ module Liquid
       result
     end
 
-    # @public_docs
-    # @type filter
-    # @title base64_encode
-    # @summary Encodes a string into Base64.
-    # @category string
-    # @syntax {{ string | base64_encode }}
-    # @return string
-    def base64_encode(input)
-      Base64.strict_encode64(input.to_s)
-    end
-
-    # @public_docs
-    # @type filter
-    # @summary Decodes a string from Base64.
-    # @category string
-    # @syntax {{ string | base64_decode }}
-    # @return string
-    def base64_decode(input)
-      Base64.strict_decode64(input.to_s)
-    rescue ::ArgumentError
-      raise Liquid::ArgumentError, "invalid base64 provided to base64_decode"
-    end
-
-    # @public_docs
-    # @type filter
-    # @summary Encodes a string into URL-safe Base64
-    # @category string
-    # @syntax {{ string | base64_url_safe_encode }}
-    # @return string
-    # @description
-    #   To produce URL-safe Base64, this filter uses `-`` and `_`` in place of `+`` and `/``.
-    def base64_url_safe_encode(input)
-      Base64.urlsafe_encode64(input.to_s)
-    end
-
-    # @public_docs
-    # @type filter
-    # @summary Decodes a string from URL-safe Base64.
-    # @category string
-    # @syntax {{ string | base64_url_safe_decode }}
-    # @return string
-    def base64_url_safe_decode(input)
-      Base64.urlsafe_decode64(input.to_s)
-    rescue ::ArgumentError
-      raise Liquid::ArgumentError, "invalid base64 provided to base64_url_safe_decode"
-    end
-
     def slice(input, offset, length = nil)
       offset = Utils.to_integer(offset)
       length = length ? Utils.to_integer(length) : 1
@@ -149,34 +73,7 @@ module Liquid
       end
     end
 
-    # @public_docs
-    # @type filter
-    # @category string
-    # @summary
-    #   Truncates a string down to a specified number of characters.
-    # @description
-    #   By default, an ellipsis (`...`)
-    #   is appended to the truncated string.
-    #
-    #   > Tip:
-    #   > The number of characters in both default and custom ellipses is included in the
-    #   > character count for the truncated string. For example, if you want to truncate a string
-    #   > down to ten characters and use the default ellipsis (`...`), then you should set the
-    #   > character count parameter to `13`.
-    #
-    #   ### Custom ellipsis
-    #
-    #   The `truncate` filter accepts an optional parameter to specify a custom ellipsis to be
-    #   appended to the truncated string.
-    #
-    #   ### No ellipsis
-    #
-    #   If you don't want an ellipsis appended to your truncated string, then you can set the
-    #   ellipsis parameter to a blank string (`''`).
-    # @syntax {{ string | truncate: character_count, ellipsis }}
-    # @required_param character_count [number] The number of characters to include in the truncated string. Includes the characters in the ellipsis.
-    # @optional_param ellipsis [string] The format of the ellipsis appended to the truncated string. Default is `...`. Pass a blank string (`''`) to remove the ellipsis completely.
-    # @return string
+    # Truncate a string down to x characters
     def truncate(input, length = 50, truncate_string = "...")
       return if input.nil?
       input_str = input.to_s
@@ -190,44 +87,15 @@ module Liquid
       input_str.length > length ? input_str[0...l].concat(truncate_string_str) : input_str
     end
 
-    # @public_docs
-    # @type filter
-    # @category string
-    # @summary
-    #   Truncates a string down to a specified number of words.
-    # @description
-    # By default, an ellipsis (`...`) is appended to the truncated string.
-    #
-    #   ### Custom ellipsis
-    #
-    #   The `truncate` filter accepts an optional parameter to specify a custom ellipsis to be
-    #   appended to the truncated string.
-    #
-    #   ### No ellipsis
-    #
-    #   If you don't want an ellipsis appended to your truncated string, then you can set the
-    #   ellipsis parameter to a blank string (`''`).
-    # @syntax {{ string | truncatewords: word_count, ellipsis }}
-    # @required_param word_count [number] The number of words to include in the truncated string. Includes the characters in the ellipsis.
-    # @optional_param ellipsis [string] The format of the ellipsis appended to the truncated string. Default is `...`. Pass a blank string (`''`) to remove the ellipsis completely.
-    # @return string
     def truncatewords(input, words = 15, truncate_string = "...")
       return if input.nil?
-      input = input.to_s
-      words = Utils.to_integer(words)
-      words = 1 if words <= 0
+      wordlist = input.to_s.split
+      words    = Utils.to_integer(words)
 
-      wordlist = begin
-        input.split(" ", words + 1)
-      rescue RangeError
-        raise if words + 1 < MAX_INT
-        # e.g. integer #{words} too big to convert to `int'
-        raise Liquid::ArgumentError, "integer #{words} too big for truncatewords"
-      end
-      return input if wordlist.length <= words
+      l = words - 1
+      l = 0 if l < 0
 
-      wordlist.pop
-      wordlist.join(" ").concat(truncate_string.to_s)
+      wordlist.length > l ? wordlist[0..l].join(" ").concat(truncate_string.to_s) : input
     end
 
     # Split input string into an array of substrings separated by given pattern.
@@ -239,46 +107,18 @@ module Liquid
       input.to_s.split(pattern.to_s)
     end
 
-    # @public_docs
-    # @type filter
-    # @category string
-    # @summary
-    #   Strips all whitespace, such as tabs, spaces, and newlines, from the left and right sides of a string.
-    # @syntax {{ string | strip }}
-    # @return string
     def strip(input)
       input.to_s.strip
     end
 
-    # @public_docs
-    # @type filter
-    # @category string
-    # @summary
-    #   Strips all whitespace, such as tabs, spaces, and newlines, from the left side of a string.
-    # @syntax {{ string | lstrip }}
-    # @return string
     def lstrip(input)
       input.to_s.lstrip
     end
 
-    # @public_docs
-    # @type filter
-    # @category string
-    # @summary
-    #   Strips all whitespace, such as tabs, spaces, and newlines, from the right side of a string.
-    # @syntax {{ string | rstrip }}
-    # @return string
     def rstrip(input)
       input.to_s.rstrip
     end
 
-    # @public_docs
-    # @type filter
-    # @category string
-    # @summary
-    #   Strips all HTML tags from a string.
-    # @syntax {{ string | strip_html }}
-    # @return string
     def strip_html(input)
       empty  = ''
       result = input.to_s.gsub(STRIP_HTML_BLOCKS, empty)
@@ -286,36 +126,18 @@ module Liquid
       result
     end
 
-    # @public_docs
-    # @type filter
-    # @category string
-    # @summary
-    #   Strips all line breaks and newlines from a string.
-    # @syntax {{ string | strip_newlines }}
-    # @return string
+    # Remove all newlines from the string
     def strip_newlines(input)
       input.to_s.gsub(/\r?\n/, '')
     end
 
-    # @public_docs
-    # @type filter
-    # @category array
-    # @summary Joins the elements in an array. The result is a single string.
-    # @syntax {{ array | join: ', ' }}
-    # @required_param delimiter [string] The separator to join the array elements with.
-    # @return string
+    # Join elements of the array with certain character between them
     def join(input, glue = ' ')
       InputIterator.new(input, context).join(glue)
     end
 
-    # @public_docs
-    # @type filter
-    # @category array
-    # @summary Sorts the elements of an array.
-    # @description The order of the sorted array is case-sensitive.
-    # @syntax {{ array | sort: property }}
-    # @optional_param property [string] The property of the element to sort by.
-    # @return array
+    # Sort elements of the array
+    # provide optional property with which to sort an array of hashes or drops
     def sort(input, property = nil)
       ary = InputIterator.new(input, context)
 
@@ -361,23 +183,17 @@ module Liquid
 
       if ary.empty?
         []
-      elsif target_value.nil?
-        ary.select do |item|
-          item[property]
+      elsif ary.first.respond_to?(:[]) && target_value.nil?
+        begin
+          ary.select { |item| item[property] }
         rescue TypeError
           raise_property_error(property)
-        rescue NoMethodError
-          return nil unless item.respond_to?(:[])
-          raise
         end
-      else
-        ary.select do |item|
-          item[property] == target_value
+      elsif ary.first.respond_to?(:[])
+        begin
+          ary.select { |item| item[property] == target_value }
         rescue TypeError
           raise_property_error(property)
-        rescue NoMethodError
-          return nil unless item.respond_to?(:[])
-          raise
         end
       end
     end
@@ -391,36 +207,22 @@ module Liquid
         ary.uniq
       elsif ary.empty? # The next two cases assume a non-empty array.
         []
-      else
-        ary.uniq do |item|
-          item[property]
+      elsif ary.first.respond_to?(:[])
+        begin
+          ary.uniq { |a| a[property] }
         rescue TypeError
           raise_property_error(property)
-        rescue NoMethodError
-          return nil unless item.respond_to?(:[])
-          raise
         end
       end
     end
 
-    # @public_docs
-    # @type tag
-    # @category array
-    # @summary Reverses the order of the items in an array.
-    # @syntax {{ array | reverse }}
-    # @return array
+    # Reverse the elements of an array
     def reverse(input)
       ary = InputIterator.new(input, context)
       ary.reverse
     end
 
-    # @public_docs
-    # @type tag
-    # @category array
-    # @summary Accepts an array element's property as a parameter and creates an array out of the property value for each array element.
-    # @required_param property [string] The property to extract from the element.
-    # @syntax {{ array | map: 'property' }}
-    # @return array
+    # map/collect on a given property
     def map(input, property)
       InputIterator.new(input, context).map do |e|
         e = e.call if e.is_a?(Proc)
@@ -445,26 +247,16 @@ module Liquid
         ary.compact
       elsif ary.empty? # The next two cases assume a non-empty array.
         []
-      else
-        ary.reject do |item|
-          item[property].nil?
+      elsif ary.first.respond_to?(:[])
+        begin
+          ary.reject { |a| a[property].nil? }
         rescue TypeError
           raise_property_error(property)
-        rescue NoMethodError
-          return nil unless item.respond_to?(:[])
-          raise
         end
       end
     end
 
-    # @public_docs
-    # @summary Replaces all occurrences of a string with a substring.
-    # @type filter
-    # @category string
-    # @syntax {{ string | replace: original_string, replacement_string }}
-    # @required_param original_string [string] The string to replace.
-    # @required_param replacement_string [string] The replacement string.
-    # @return string
+    # Replace occurrences of a string with another
     def replace(input, string, replacement = '')
       input.to_s.gsub(string.to_s, replacement.to_s)
     end
@@ -474,71 +266,25 @@ module Liquid
       input.to_s.sub(string.to_s, replacement.to_s)
     end
 
-    # Replace the last occurrences of a string with another
-    def replace_last(input, string, replacement)
-      input = input.to_s
-      string = string.to_s
-      replacement = replacement.to_s
-
-      start_index = input.rindex(string)
-
-      return input unless start_index
-
-      output = input.dup
-      output[start_index, string.length] = replacement
-      output
-    end
-
-    # @public_docs
-    # @summary Removes a substring from a string.
-    # @type filter
-    # @category string
-    # @syntax {{ string | remove: substring }}
-    # @required_param substring [string] The substring to remove from the string.
-    # @return string
+    # remove a substring
     def remove(input, string)
-      replace(input, string, '')
+      input.to_s.gsub(string.to_s, '')
     end
 
-    # @public_docs
-    # @summary Removes the first occurrences of a substring.
-    # @type filter
-    # @category string
-    # @syntax {{ string | remove_first: substring }}
-    # @required_param substring [string] The substring to remove from the string.
-    # @return string
+    # remove the first occurrences of a substring
     def remove_first(input, string)
-      replace_first(input, string, '')
-    end
-
-    # remove the last occurences of a substring
-    def remove_last(input, string)
-      replace_last(input, string, '')
+      input.to_s.sub(string.to_s, '')
     end
 
     # add one string to another
-    #
-    # @public_docs
-    # @type filter
-    # @summary Appends characters to a string.
-    # @category string
-    # @syntax {{ string | append: to_append }}
-    # @required_param to_append [string] characters to append to the original string
-    # @return string
     def append(input, string)
       input.to_s + string.to_s
     end
 
-    # @public_docs
-    # @type filter
-    # @category array
-    # @summary Concatenates (combines) an array with another array.
-    # @description
-    #   The resulting array contains all the elements of the original arrays.
-    #   `concat` won't remove duplicate entries from the concatenated array unless you also use the [`uniq`](/api/liquid/filters/array-filters#uniq) filter.
-    # @syntax {{ first_array | concat: second_array }}
-    # @required_param second_array [array] The array to concatenate with the primary array.
-    # @return array
+    def append_all(input, *items)
+      input.to_s + items.join
+    end
+
     def concat(input, array)
       unless array.respond_to?(:to_ary)
         raise ArgumentError, "concat filter requires an array argument"
@@ -546,20 +292,14 @@ module Liquid
       InputIterator.new(input, context).concat(array)
     end
 
-    # @public_docs
-    # @summary Prepends a string to another string.
-    # @type filter
-    # @category string
-    # @syntax {{ string | prepend: additional_string }}
-    # @required_param  additional_string [string] The string to prepend to the original string.
-    # @return string
+    # prepend a string to another
     def prepend(input, string)
       string.to_s + input.to_s
     end
 
     # Add <br /> tags in front of all newlines in input string
     def newline_to_br(input)
-      input.to_s.gsub(/\r?\n/, "<br />\n")
+      input.to_s.gsub(/\n/, "<br />\n")
     end
 
     # Reformat a date using Ruby's core Time#strftime( string ) -> string
@@ -601,101 +341,58 @@ module Liquid
       date.strftime(format.to_s)
     end
 
-    # @public_docs
-    # @type filter
-    # @category array
-    # @summary Returns the first element of an array.
-    # @syntax {{ array | first }}
+    # Get the first element of the passed in array
+    #
+    # Example:
+    #    {{ product.images | first | to_img }}
+    #
     def first(array)
       array.first if array.respond_to?(:first)
     end
 
-    # @public_docs
-    # @type filter
-    # @category array
-    # @summary Returns the last element of an array, or the last character inside of a string.
-    # @syntax {{ array | last }}
+    # Get the last element of the passed in array
+    #
+    # Example:
+    #    {{ product.images | last | to_img }}
+    #
     def last(array)
       array.last if array.respond_to?(:last)
     end
 
-    # @public_docs
-    # @syntax {{ number | abs }}
-    # @summary Returns the absolute value of a number.
-    # @type filter
-    # @category math
-    # @return number
-    # @description
-    #   `abs` will also work on a string if the string only contains a number.
+    # absolute value
     def abs(input)
       result = Utils.to_number(input).abs
       result.is_a?(BigDecimal) ? result.to_f : result
     end
 
-    # @public_docs
-    # @summary Adds a number to an output.
-    # @type filter
-    # @category math
-    # @syntax {{ number | plus: number }}
-    # @required_param number [number] The number to add to the original number.
-    # @return number
+    # addition
     def plus(input, operand)
       apply_operation(input, operand, :+)
     end
 
-    # @public_docs
-    # @summary Subtracts a number from an output.
-    # @type filter
-    # @category math
-    # @syntax {{ number | minus: number }}
-    # @return number
+    # subtraction
     def minus(input, operand)
       apply_operation(input, operand, :-)
     end
 
-    # @public_docs
-    # @summary Multiplies an output by a number.
-    # @type filter
-    # @category math
-    # @syntax {{ number | times: number }}
-    # @required_param number [number] The number to multiply the original number by.
-    # @return number
+    # multiplication
     def times(input, operand)
       apply_operation(input, operand, :*)
     end
 
-    # @public_docs
-    # @summary Divides an output by a number. The output is rounded down to the nearest integer.
-    # @type filter
-    # @category math
-    # @syntax {{ number | divided_by: number }}
-    # @return number
+    # division
     def divided_by(input, operand)
       apply_operation(input, operand, :/)
     rescue ::ZeroDivisionError => e
       raise Liquid::ZeroDivisionError, e.message
     end
 
-    # @public_docs
-    # @summary Divides an output by a number and returns the remainder.
-    # @type filter
-    # @category math
-    # @syntax {{ number | modulo: number }}
-    # @required_param number [number] The number to divide the original number by.
-    # @return number
     def modulo(input, operand)
       apply_operation(input, operand, :%)
     rescue ::ZeroDivisionError => e
       raise Liquid::ZeroDivisionError, e.message
     end
 
-    # @public_docs
-    # @summary Rounds the output to the nearest integer or specified number of decimals.
-    # @type filter
-    # @category math
-    # @syntax {{ number | round }}
-    # @optional_param decimals [number] The number of decimal places to round to.
-    # @return number
     def round(input, n = 0)
       result = Utils.to_number(input).round(Utils.to_number(n))
       result = result.to_f if result.is_a?(BigDecimal)
@@ -705,37 +402,18 @@ module Liquid
       raise Liquid::FloatDomainError, e.message
     end
 
-    # @public_docs
-    # @summary Rounds an output up to the nearest integer.
-    # @type filter
-    # @category math
-    # @syntax {{ number | ceil }}
-    # @return number
     def ceil(input)
       Utils.to_number(input).ceil.to_i
     rescue ::FloatDomainError => e
       raise Liquid::FloatDomainError, e.message
     end
 
-    # @public_docs
-    # @summary Rounds an output down to the nearest integer.
-    # @type filter
-    # @category math
-    # @syntax {{ number | floor }}
-    # @return number
     def floor(input)
       Utils.to_number(input).floor.to_i
     rescue ::FloatDomainError => e
       raise Liquid::FloatDomainError, e.message
     end
 
-    # @public_docs
-    # @summary Limits a number to a minimum value.
-    # @type filter
-    # @category math
-    # @syntax {{ number | at_least: number }}
-    # @required_param number [number] The minimum valid value.
-    # @return number
     def at_least(input, n)
       min_value = Utils.to_number(n)
 
@@ -744,13 +422,6 @@ module Liquid
       result.is_a?(BigDecimal) ? result.to_f : result
     end
 
-    # @public_docs
-    # @summary Limits a number to a maximum value.
-    # @type filter
-    # @category math
-    # @syntax {{ number | at_most: number }}
-    # @required_param number [number] The maximum valid value.
-    # @return number
     def at_most(input, n)
       max_value = Utils.to_number(n)
 
@@ -771,7 +442,7 @@ module Liquid
     #
     def default(input, default_value = '', options = {})
       options = {} unless options.is_a?(Hash)
-      false_check = options['allow_false'] ? input.nil? : !Liquid::Utils.to_liquid_value(input)
+      false_check = options['allow_false'] ? input.nil? : !input
       false_check || (input.respond_to?(:empty?) && input.empty?) ? default_value : input
     end
 
@@ -789,16 +460,10 @@ module Liquid
     end
 
     def nil_safe_compare(a, b)
-      result = a <=> b
-
-      if result
-        result
-      elsif a.nil?
-        1
-      elsif b.nil?
-        -1
+      if !a.nil? && !b.nil?
+        a <=> b
       else
-        raise Liquid::ArgumentError, "cannot sort values of incompatible types"
+        a.nil? ? 1 : -1
       end
     end
 
@@ -853,9 +518,8 @@ module Liquid
 
       def each
         @input.each do |e|
-          e = e.respond_to?(:to_liquid) ? e.to_liquid : e
           e.context = @context if e.respond_to?(:context=)
-          yield(e)
+          yield(e.respond_to?(:to_liquid) ? e.to_liquid : e)
         end
       end
     end

lib/liquid/static_registers.rb

@@ -31,11 +31,7 @@ module Liquid
       if @registers.key?(key)
         @registers.fetch(key)
       elsif default != UNDEFINED
-        if block_given?
-          @static.fetch(key, &block)
-        else
-          @static.fetch(key, default)
-        end
+        @static.fetch(key, default, &block)
       else
         @static.fetch(key, &block)
       end

lib/liquid/strainer_factory.rb

@@ -7,26 +7,25 @@ module Liquid
 
     def add_global_filter(filter)
       strainer_class_cache.clear
-      GlobalCache.add_filter(filter)
+      global_filters << filter
     end
 
     def create(context, filters = [])
       strainer_from_cache(filters).new(context)
     end
 
-    GlobalCache = Class.new(StrainerTemplate)
-
     private
 
+    def global_filters
+      @global_filters ||= []
+    end
+
     def strainer_from_cache(filters)
-      if filters.empty?
-        GlobalCache
-      else
-        strainer_class_cache[filters] ||= begin
-          klass = Class.new(GlobalCache)
-          filters.each { |f| klass.add_filter(f) }
-          klass
-        end
+      strainer_class_cache[filters] ||= begin
+        klass = Class.new(StrainerTemplate)
+        global_filters.each { |f| klass.add_filter(f) }
+        filters.each { |f| klass.add_filter(f) }
+        klass
       end
     end
 

lib/liquid/strainer_template.rb

@@ -31,11 +31,6 @@ module Liquid
         filter_methods.include?(method.to_s)
       end
 
-      def inherited(subclass)
-        super
-        subclass.instance_variable_set(:@filter_methods, @filter_methods.dup)
-      end
-
       private
 
       def filter_methods

lib/liquid/tag.rb

@@ -55,11 +55,5 @@ module Liquid
     def blank?
       false
     end
-
-    private
-
-    def parse_expression(markup)
-      parse_context.parse_expression(markup)
-    end
   end
 end

lib/liquid/tags/assign.rb

@@ -12,20 +12,15 @@ module Liquid
   class Assign < Tag
     Syntax = /(#{VariableSignature}+)\s*=\s*(.*)\s*/om
 
-    # @api private
-    def self.raise_syntax_error(parse_context)
-      raise Liquid::SyntaxError, parse_context.locale.t('errors.syntax.assign')
-    end
-
     attr_reader :to, :from
 
-    def initialize(tag_name, markup, parse_context)
+    def initialize(tag_name, markup, options)
       super
       if markup =~ Syntax
         @to   = Regexp.last_match(1)
-        @from = Variable.new(Regexp.last_match(2), parse_context)
+        @from = Variable.new(Regexp.last_match(2), options)
       else
-        self.class.raise_syntax_error(parse_context)
+        raise SyntaxError, options[:locale].t('errors.syntax.assign')
       end
     end
 
@@ -45,18 +40,11 @@ module Liquid
     def assign_score_of(val)
       if val.instance_of?(String)
         val.bytesize
-      elsif val.instance_of?(Array)
+      elsif val.instance_of?(Array) || val.instance_of?(Hash)
         sum = 1
         # Uses #each to avoid extra allocations.
         val.each { |child| sum += assign_score_of(child) }
         sum
-      elsif val.instance_of?(Hash)
-        sum = 1
-        val.each do |key, entry_value|
-          sum += assign_score_of(key)
-          sum += assign_score_of(entry_value)
-        end
-        sum
       else
         1
       end

lib/liquid/tags/case.rb

@@ -1,27 +1,6 @@
 # frozen_string_literal: true
 
 module Liquid
-  # @public_docs
-  # @title case
-  # @type tag
-  # @category controlflow
-  # @summary Creates a switch statement to execute a particular block of code when a variable has a specified value.
-  # @description
-  #   `case` initializes the switch statement, and `when` statements define the various conditions.
-  #
-  #   An optional `else` statement at the end of the case provides code to execute if none of the conditions are met.
-  # @syntax
-  #   {% case variable %}
-  #     {% when value1 %}
-  #       statement1
-  #     {% when value2 %}
-  #       statement2
-  #     {% when value3 %}
-  #       statement3
-  #     ...
-  #     {% else %}
-  #       else_statement
-  #   {% endcase %}
   class Case < Block
     Syntax     = /(#{QuotedFragment})/o
     WhenSyntax = /(#{QuotedFragment})(?:(?:\s+or\s+|\s*\,\s*)(#{QuotedFragment}.*))?/om
@@ -33,23 +12,18 @@ module Liquid
       @blocks = []
 
       if markup =~ Syntax
-        @left = parse_expression(Regexp.last_match(1))
+        @left = Expression.parse(Regexp.last_match(1))
       else
         raise SyntaxError, options[:locale].t("errors.syntax.case")
       end
     end
 
     def parse(tokens)
-      body = case_body = new_body
+      body = new_body
       body = @blocks.last.attachment while parse_body(body, tokens)
-      @blocks.reverse_each do |condition|
-        body = condition.attachment
-        unless body.frozen?
-          body.remove_blank_strings if blank?
-          body.freeze
-        end
+      if blank?
+        @blocks.each { |condition| condition.attachment.remove_blank_strings }
       end
-      case_body.freeze
     end
 
     def nodelist
@@ -73,14 +47,7 @@ module Liquid
       @blocks.each do |block|
         if block.else?
           block.attachment.render_to_output_buffer(context, output) if execute_else_block
-          next
-        end
-
-        result = Liquid::Utils.to_liquid_value(
-          block.evaluate(context)
-        )
-
-        if result
+        elsif block.evaluate(context)
           execute_else_block = false
           block.attachment.render_to_output_buffer(context, output)
         end
@@ -101,7 +68,7 @@ module Liquid
 
         markup = Regexp.last_match(2)
 
-        block = Condition.new(@left, '==', Condition.parse_expression(parse_context, Regexp.last_match(1)))
+        block = Condition.new(@left, '==', Condition.parse_expression(Regexp.last_match(1)))
         block.attach(body)
         @blocks << block
       end

lib/liquid/tags/comment.rb

@@ -1,17 +1,6 @@
 # frozen_string_literal: true
+
 module Liquid
-  # @public_docs
-  # @type tag
-  # @category theme
-  # @title comment
-  # @summary
-  #   Allows you to comment out parts of a Liquid file.
-  #   Any text within the opening and closing `comment` blocks won't be output,
-  #   and any Liquid code won't be executed.
-  # @syntax
-  #   {% comment %}
-  #     statement
-  #   {% endcomment %}
   class Comment < Block
     def render_to_output_buffer(_context, output)
       output

lib/liquid/tags/cycle.rb

@@ -13,19 +13,6 @@ module Liquid
   #    <div class="red"> Item four </div>
   #    <div class="green"> Item five</div>
   #
-  # @public_docs
-  # @title cycle
-  # @type tag
-  # @category iteration
-  # @summary Loops through a group of strings and prints them in the order that they were passed as parameters.
-  # @description
-  #   Each time `cycle` is called, the next string that was passed as a parameter is printed.
-  #
-  #   `cycle` must be used within a `for` loop block.
-  # @syntax
-  #   {% for condition %}
-  #      {% cycle value1, value2 ... %}
-  #   {% endfor %}
   class Cycle < Tag
     SimpleSyntax = /\A#{QuotedFragment}+/o
     NamedSyntax  = /\A(#{QuotedFragment})\s*\:\s*(.*)/om
@@ -37,7 +24,7 @@ module Liquid
       case markup
       when NamedSyntax
         @variables = variables_from_string(Regexp.last_match(2))
-        @name      = parse_expression(Regexp.last_match(1))
+        @name      = Expression.parse(Regexp.last_match(1))
       when SimpleSyntax
         @variables = variables_from_string(markup)
         @name      = @variables.to_s
@@ -74,7 +61,7 @@ module Liquid
     def variables_from_string(markup)
       markup.split(',').collect do |var|
         var =~ /\s*(#{QuotedFragment})\s*/o
-        Regexp.last_match(1) ? parse_expression(Regexp.last_match(1)) : nil
+        Regexp.last_match(1) ? Expression.parse(Regexp.last_match(1)) : nil
       end.compact
     end
 

lib/liquid/tags/echo.rb

@@ -1,19 +1,17 @@
 # frozen_string_literal: true
 
 module Liquid
-  # @public_docs
-  # @type tag
-  # @category theme
-  # @title echo
-  # @summary
-  #   Outputs an expression, or Liquid object, in the rendered HTML.
-  #   Works the same as wrapping an expression in double curly brace delimiters `{{ }}`.
-  #   Works inside the [`liquid`](/api/liquid/tags/theme-tags#liquid) tag and supports [filters](/api/liquid/filters).
-  # @syntax
-  #   {% echo 'string' %}
+  # Echo outputs an expression
+  #
+  #   {% echo monkey %}
+  #   {% echo user.name %}
+  #
+  # This is identical to variable output syntax, like {{ foo }}, but works
+  # inside {% liquid %} tags. The full syntax is supported, including filters:
+  #
+  #   {% echo user | link %}
+  #
   class Echo < Tag
-    attr_reader :variable
-
     def initialize(tag_name, markup, parse_context)
       super
       @variable = Variable.new(markup, parse_context)
@@ -22,12 +20,6 @@ module Liquid
     def render(context)
       @variable.render_to_output_buffer(context, +'')
     end
-
-    class ParseTreeVisitor < Liquid::ParseTreeVisitor
-      def children
-        [@node.variable]
-      end
-    end
   end
 
   Template.register_tag('echo', Echo)

lib/liquid/tags/for.rb

@@ -45,20 +45,6 @@ module Liquid
   # forloop.last:: Returns true if the item is the last item.
   # forloop.parentloop:: Provides access to the parent loop, if present.
   #
-  # @public_docs
-  # @title for
-  # @type tag
-  # @category iteration
-  # @summary Repeatedly executes a block of code.
-  # @description
-  #    You can output a maximum of 50 results per page with `for` loops. In cases where there are more than 50 results,
-  #    use the [`paginate`](/api/liquid/tags/theme-tags#paginate) tag to split them across multiple pages.
-  #
-  #    For a full list of attributes available within a `for` loop, refer to the [`forloop`](/api/liquid/objects/for-loops) object.
-  # @syntax
-  #   {% for variable in iterable parameters %}
-  # @optional_param limit [number] Exit the `for` loop at the specified index.
-  # @optional_param offset [number] Start the `for` loop at the specified index.
   class For < Block
     Syntax = /\A(#{VariableSegment}+)\s+in\s+(#{QuotedFragment}+)\s*(reversed)?/o
 
@@ -77,11 +63,9 @@ module Liquid
         parse_body(@else_block, tokens)
       end
       if blank?
-        @else_block&.remove_blank_strings
         @for_block.remove_blank_strings
+        @else_block&.remove_blank_strings
       end
-      @else_block&.freeze
-      @for_block.freeze
     end
 
     def nodelist
@@ -113,7 +97,7 @@ module Liquid
         collection_name  = Regexp.last_match(2)
         @reversed        = !!Regexp.last_match(3)
         @name            = "#{@variable_name}-#{collection_name}"
-        @collection_name = parse_expression(collection_name)
+        @collection_name = Expression.parse(collection_name)
         markup.scan(TagAttributes) do |key, value|
           set_attribute(key, value)
         end
@@ -128,7 +112,7 @@ module Liquid
       raise SyntaxError, options[:locale].t("errors.syntax.for_invalid_in") unless p.id?('in')
 
       collection_name  = p.expression
-      @collection_name = parse_expression(collection_name)
+      @collection_name = Expression.parse(collection_name)
 
       @name     = "#{@variable_name}-#{collection_name}"
       @reversed = p.id?('reversed')
@@ -212,13 +196,12 @@ module Liquid
       case key
       when 'offset'
         @from = if expr == 'continue'
-          Usage.increment('for_offset_continue')
           :continue
         else
-          parse_expression(expr)
+          Expression.parse(expr)
         end
       when 'limit'
-        @limit = parse_expression(expr)
+        @limit = Expression.parse(expr)
       end
     end
 

lib/liquid/tags/if.rb

@@ -3,15 +3,14 @@
 module Liquid
   # If is the conditional block
   #
-  # @public_docs
-  # @title if
-  # @type tag
-  # @category controlflow
-  # @summary Executes a block of code only if a certain condition is met (if the result is `truthy`).
-  # @syntax
-  #   {% if variable operator value %}
-  #     statement
+  #   {% if user.admin %}
+  #     Admin user!
+  #   {% else %}
+  #     Not admin user
   #   {% endif %}
+  #
+  #    There are {% if count < 5 %} less {% else %} more {% endif %} items than you need.
+  #
   class If < Block
     Syntax                  = /(#{QuotedFragment})\s*([=!<>a-z_]+)?\s*(#{QuotedFragment})?/o
     ExpressionsAndOperators = /(?:\b(?:\s?and\s?|\s?or\s?)\b|(?:\s*(?!\b(?:\s?and\s?|\s?or\s?)\b)(?:#{QuotedFragment}|\S+)\s*)+)/o
@@ -32,17 +31,13 @@ module Liquid
     def parse(tokens)
       while parse_body(@blocks.last.attachment, tokens)
       end
-      @blocks.reverse_each do |block|
-        block.attachment.remove_blank_strings if blank?
-        block.attachment.freeze
+      if blank?
+        @blocks.each { |condition| condition.attachment.remove_blank_strings }
       end
     end
 
-    ELSE_TAG_NAMES = ['elsif', 'else'].freeze
-    private_constant :ELSE_TAG_NAMES
-
     def unknown_tag(tag, markup, tokens)
-      if ELSE_TAG_NAMES.include?(tag)
+      if ['elsif', 'else'].include?(tag)
         push_block(tag, markup)
       else
         super
@@ -51,11 +46,7 @@ module Liquid
 
     def render_to_output_buffer(context, output)
       @blocks.each do |block|
-        result = Liquid::Utils.to_liquid_value(
-          block.evaluate(context)
-        )
-
-        if result
+        if block.evaluate(context)
           return block.attachment.render_to_output_buffer(context, output)
         end
       end
@@ -77,7 +68,7 @@ module Liquid
     end
 
     def parse_expression(markup)
-      Condition.parse_expression(parse_context, markup)
+      Condition.parse_expression(markup)
     end
 
     def lax_parse(markup)

lib/liquid/tags/include.rb

@@ -32,12 +32,12 @@ module Liquid
         variable_name = Regexp.last_match(3)
 
         @alias_name         = Regexp.last_match(5)
-        @variable_name_expr = variable_name ? parse_expression(variable_name) : nil
-        @template_name_expr = parse_expression(template_name)
+        @variable_name_expr = variable_name ? Expression.parse(variable_name) : nil
+        @template_name_expr = Expression.parse(template_name)
         @attributes         = {}
 
         markup.scan(TagAttributes) do |key, value|
-          @attributes[key] = parse_expression(value)
+          @attributes[key] = Expression.parse(value)
         end
 
       else

lib/liquid/tags/raw.rb

@@ -1,16 +1,6 @@
 # frozen_string_literal: true
 
 module Liquid
-  # @public_docs
-  # @type tag
-  # @category theme
-  # @title raw
-  # @summary
-  #   Allows you to output Liquid code on a page without it being parsed.
-  # @syntax
-  #   {% raw %}
-  #     liquid
-  #   {% endraw %}
   class Raw < Block
     Syntax = /\A\s*\z/
     FullTokenPossiblyInvalid = /\A(.*)#{TagStart}\s*(\w+)\s*(.*)?#{TagEnd}\z/om

lib/liquid/tags/render.rb

@@ -1,28 +1,6 @@
 # frozen_string_literal: true
 
 module Liquid
-  # @public_docs
-  # @type tag
-  # @category theme
-  # @title render
-  # @summary
-  #   Renders a snippet from the **snippets** folder of a theme, or [code for an app block](/themes/architecture/sections/section-schema#render-app-blocks).
-  #  You don't need to write the file's `.liquid` extension.
-  # @description
-  #    When a snippet is rendered, the code inside it doesn't automatically have access to the variables assigned
-  #    using [variable tags](/api/liquid/tags/variable-tags) within the snippet's parent template.
-  #    Similarly, variables assigned within the snippet can't be accessed by the code outside of the snippet.
-  #    This encapsulation increases performance and helps make theme code easier to understand and maintain.
-  #
-  #    You can't use an [`include`](/api/liquid/tags/theme-tags#include) tag inside of a snippet rendered using the `render` tag.
-  #
-  #    > Tip:
-  #    > This tag replaces the deprecated [`include`](/api/liquid/tags/theme-tags#include) tag.
-  # @syntax
-  #   {% render reference %}
-  # @optional_param with [string] Pass an object to use in the snippet. Use with the `as` parameter.
-  # @optional_param for [string] Render the snippet once for each value of an enumerable object. Use with the `as` parameter. When using the `for` parameter, the [`forloop`](/api/liquid/objects/for-loops) object is accessible within the snippet.
-  # @optional_param as [string] The variable that the object referenced by a `with` or `for` parameter represents within the snippet.
   class Render < Tag
     FOR = 'for'
     SYNTAX = /(#{QuotedString}+)(\s+(with|#{FOR})\s+(#{QuotedFragment}+))?(\s+(?:as)\s+(#{VariableSegment}+))?/o
@@ -41,13 +19,13 @@ module Liquid
       variable_name = Regexp.last_match(4)
 
       @alias_name = Regexp.last_match(6)
-      @variable_name_expr = variable_name ? parse_expression(variable_name) : nil
-      @template_name_expr = parse_expression(template_name)
+      @variable_name_expr = variable_name ? Expression.parse(variable_name) : nil
+      @template_name_expr = Expression.parse(template_name)
       @for = (with_or_for == FOR)
 
       @attributes = {}
       markup.scan(TagAttributes) do |key, value|
-        @attributes[key] = parse_expression(value)
+        @attributes[key] = Expression.parse(value)
       end
     end
 

lib/liquid/tags/table_row.rb

@@ -1,23 +1,6 @@
 # frozen_string_literal: true
 
 module Liquid
-  # @public_docs
-  # @title tablerow
-  # @type tag
-  # @category iteration
-  # @summary Generates rows for an HTML table.
-  # @description
-  #   Must be wrapped in opening `<table>` and closing `</table>` HTML tags.
-  #   For a full list of attributes available within a `tablerow` loop, refer to the [`tablerow`](/api/liquid/objects/tablerow) object.
-  # @syntax
-  #   <table>
-  #     {% tablerow variable in interable parameters %}
-  #       content
-  #     {% endtablerow %}
-  #   </table>
-  # @optional_param cols [number] The number of columns the table should have.
-  # @optional_param limit [number] Exit the `tablerow` loop at the specified index.
-  # @optional_param offset [number] Start the `tablerow` loop at the specified index.
   class TableRow < Block
     Syntax = /(\w+)\s+in\s+(#{QuotedFragment}+)/o
 
@@ -27,10 +10,10 @@ module Liquid
       super
       if markup =~ Syntax
         @variable_name   = Regexp.last_match(1)
-        @collection_name = parse_expression(Regexp.last_match(2))
+        @collection_name = Expression.parse(Regexp.last_match(2))
         @attributes      = {}
         markup.scan(TagAttributes) do |key, value|
-          @attributes[key] = parse_expression(value)
+          @attributes[key] = Expression.parse(value)
         end
       else
         raise SyntaxError, options[:locale].t("errors.syntax.table_row")

lib/liquid/tags/unless.rb

@@ -3,34 +3,21 @@
 require_relative 'if'
 
 module Liquid
-  # @public_docs
-  # @title unless
-  # @type tag
-  # @category controlflow
-  # @summary Executes a block of code only if a certain condition is not met (if the result is `falsy`).
-  # @syntax
-  #   {% unless variable operator value %}
-  #     statement
-  #   {% endunless %}
+  # Unless is a conditional just like 'if' but works on the inverse logic.
+  #
+  #   {% unless x < 0 %} x is greater than zero {% endunless %}
+  #
   class Unless < If
     def render_to_output_buffer(context, output)
       # First condition is interpreted backwards ( if not )
       first_block = @blocks.first
-      result = Liquid::Utils.to_liquid_value(
-        first_block.evaluate(context)
-      )
-
-      unless result
+      unless first_block.evaluate(context)
         return first_block.attachment.render_to_output_buffer(context, output)
       end
 
       # After the first condition unless works just like if
       @blocks[1..-1].each do |block|
-        result = Liquid::Utils.to_liquid_value(
-          block.evaluate(context)
-        )
-
-        if result
+        if block.evaluate(context)
           return block.attachment.render_to_output_buffer(context, output)
         end
       end

lib/liquid/template.rb

@@ -106,9 +106,12 @@ module Liquid
     # Parse source code.
     # Returns self for easy chaining
     def parse(source, options = {})
-      parse_context = configure_options(options)
-      tokenizer     = parse_context.new_tokenizer(source, start_line_number: @line_numbers && 1)
-      @root         = Document.parse(tokenizer, parse_context)
+      @options      = options
+      @profiling    = options[:profile]
+      @line_numbers = options[:line_numbers] || @profiling
+      parse_context = options.is_a?(ParseContext) ? options : ParseContext.new(options)
+      @root         = Document.parse(tokenize(source), parse_context)
+      @warnings     = parse_context.warnings
       self
     end
 
@@ -150,7 +153,7 @@ module Liquid
         c = args.shift
 
         if @rethrow_errors
-          c.exception_renderer = Liquid::RAISE_EXCEPTION_LAMBDA
+          c.exception_renderer = ->(_e) { raise }
         end
 
         c
@@ -186,13 +189,12 @@ module Liquid
       # Retrying a render resets resource usage
       context.resource_limits.reset
 
-      if @profiling && context.profiler.nil?
-        @profiler = context.profiler = Liquid::Profiler.new
-      end
-
       begin
         # render the nodelist.
-        @root.render_to_output_buffer(context, output || +'')
+        # for performance reasons we get an array back here. join will make a string out of it.
+        with_profiling(context) do
+          @root.render_to_output_buffer(context, output || +'')
+        end
       rescue Liquid::MemoryError => e
         context.handle_error(e)
       ensure
@@ -211,17 +213,25 @@ module Liquid
 
     private
 
-    def configure_options(options)
-      if (profiling = options[:profile])
-        raise "Profiler not loaded, require 'liquid/profiler' first" unless defined?(Liquid::Profiler)
-      end
+    def tokenize(source)
+      Tokenizer.new(source, @line_numbers)
+    end
 
-      @options      = options
-      @profiling    = profiling
-      @line_numbers = options[:line_numbers] || @profiling
-      parse_context = options.is_a?(ParseContext) ? options : ParseContext.new(options)
-      @warnings     = parse_context.warnings
-      parse_context
+    def with_profiling(context)
+      if @profiling && !context.partial
+        raise "Profiler not loaded, require 'liquid/profiler' first" unless defined?(Liquid::Profiler)
+
+        @profiler = Profiler.new(context.template_name)
+        @profiler.start
+
+        begin
+          yield
+        ensure
+          @profiler.stop
+        end
+      else
+        yield
+      end
     end
 
     def apply_options_to_context(context, options)

lib/liquid/tokenizer.rb

@@ -5,7 +5,7 @@ module Liquid
     attr_reader :line_number, :for_liquid_tag
 
     def initialize(source, line_numbers = false, line_number: nil, for_liquid_tag: false)
-      @source         = source.to_s.to_str
+      @source         = source
       @line_number    = line_number || (line_numbers ? 1 : nil)
       @for_liquid_tag = for_liquid_tag
       @tokens         = tokenize
@@ -24,7 +24,7 @@ module Liquid
     private
 
     def tokenize
-      return [] if @source.empty?
+      return [] if @source.to_s.empty?
 
       return @source.split("\n") if @for_liquid_tag
 

lib/liquid/utils.rb

@@ -81,13 +81,5 @@ module Liquid
     rescue ::ArgumentError
       nil
     end
-
-    def self.to_liquid_value(obj)
-      # Enable "obj" to represent itself as a primitive value like integer, string, or boolean
-      return obj.to_liquid_value if obj.respond_to?(:to_liquid_value)
-
-      # Otherwise return the object itself
-      obj
-    end
   end
 end

lib/liquid/variable.rb

@@ -30,7 +30,9 @@ module Liquid
       @parse_context = parse_context
       @line_number   = parse_context.line_number
 
-      strict_parse_with_error_mode_fallback(markup)
+      parse_with_selected_parser(markup)
+
+      Optimizer.optimize_variable(self)
     end
 
     def raw
@@ -63,8 +65,6 @@ module Liquid
       @filters = []
       p = Parser.new(markup)
 
-      return if p.look(:end_of_string)
-
       @name = Expression.parse(p.expression)
       while p.consume?(:pipe)
         filtername = p.consume(:id)
@@ -83,11 +83,9 @@ module Liquid
     end
 
     def render(context)
-      obj = context.evaluate(@name)
-
-      @filters.each do |filter_name, filter_args, filter_kwargs|
+      obj = @filters.inject(context.evaluate(@name)) do |output, (filter_name, filter_args, filter_kwargs)|
         filter_args = evaluate_filter_expressions(context, filter_args, filter_kwargs)
-        obj = context.invoke(filter_name, obj, *filter_args)
+        context.invoke(filter_name, output, *filter_args)
       end
 
       context.apply_global_filter(obj)

lib/liquid/variable_lookup.rb

@@ -40,9 +40,6 @@ module Liquid
       @lookups.each_index do |i|
         key = context.evaluate(@lookups[i])
 
-        # Cast "key" to its liquid value to enable it to act as a primitive value
-        key = Liquid::Utils.to_liquid_value(key)
-
         # If object is a hash- or array-like object we look for the
         # presence of the key and if its available we return it
         if object.respond_to?(:[]) &&

lib/liquid/version.rb

@@ -2,5 +2,5 @@
 # frozen_string_literal: true
 
 module Liquid
-  VERSION = "5.3.0.alpha"
+  VERSION = "4.0.3"
 end

liquid.gemspec

@@ -17,11 +17,9 @@ Gem::Specification.new do |s|
   s.license     = "MIT"
   # s.description = "A secure, non-evaling end user template engine with aesthetic markup."
 
-  s.required_ruby_version     = ">= 2.5.0"
+  s.required_ruby_version     = ">= 2.4.0"
   s.required_rubygems_version = ">= 1.3.7"
 
-  s.metadata['allowed_push_host'] = 'https://rubygems.org'
-
   s.test_files  = Dir.glob("{test}/**/*")
   s.files       = Dir.glob("{lib}/**/*") + %w(LICENSE README.md)
 

performance/shopify/database.rb

@@ -3,19 +3,11 @@
 require 'yaml'
 
 module Database
-  DATABASE_FILE_PATH = "#{__dir__}/vision.database.yml"
-
   # Load the standard vision toolkit database and re-arrage it to be simply exportable
   # to liquid as assigns. All this is based on Shopify
   def self.tables
     @tables ||= begin
-      db =
-        if YAML.respond_to?(:unsafe_load_file) # Only Psych 4+ can use unsafe_load_file
-          # unsafe_load_file is needed for YAML references
-          YAML.unsafe_load_file(DATABASE_FILE_PATH)
-        else
-          YAML.load_file(DATABASE_FILE_PATH)
-        end
+      db = YAML.load_file("#{__dir__}/vision.database.yml")
 
       # From vision source
       db['products'].each do |product|

performance/theme_runner.rb

@@ -73,14 +73,10 @@ class ThemeRunner
 
   private
 
-  def render_layout(template, layout, assigns)
-    assigns['content_for_layout'] = template.render!(assigns)
-    layout&.render!(assigns)
-  end
-
   def compile_and_render(template, layout, assigns, page_template, template_file)
-    compiled_test = compile_test(template, layout, assigns, page_template, template_file)
-    render_layout(compiled_test[:tmpl], compiled_test[:layout], compiled_test[:assigns])
+    compiled_test                 = compile_test(template, layout, assigns, page_template, template_file)
+    assigns['content_for_layout'] = compiled_test[:tmpl].render!(assigns)
+    compiled_test[:layout].render!(assigns) if layout
   end
 
   def compile_all_tests

test/integration/assign_test.rb

@@ -44,74 +44,7 @@ class AssignTest < Minitest::Test
       end
     end
     with_error_mode(:lax) do
-      assert(Template.parse("{% assign foo = ('X' | downcase) %}"))
+      assert Template.parse("{% assign foo = ('X' | downcase) %}")
     end
   end
-
-  def test_expression_with_whitespace_in_square_brackets
-    source = "{% assign r = a[ 'b' ] %}{{ r }}"
-    assert_template_result('result', source, 'a' => { 'b' => 'result' })
-  end
-
-  def test_assign_score_exceeding_resource_limit
-    t = Template.parse("{% assign foo = 42 %}{% assign bar = 23 %}")
-    t.resource_limits.assign_score_limit = 1
-    assert_equal("Liquid error: Memory limits exceeded", t.render)
-    assert(t.resource_limits.reached?)
-
-    t.resource_limits.assign_score_limit = 2
-    assert_equal("", t.render!)
-    refute_nil(t.resource_limits.assign_score)
-  end
-
-  def test_assign_score_exceeding_limit_from_composite_object
-    t = Template.parse("{% assign foo = 'aaaa' | reverse %}")
-
-    t.resource_limits.assign_score_limit = 3
-    assert_equal("Liquid error: Memory limits exceeded", t.render)
-    assert(t.resource_limits.reached?)
-
-    t.resource_limits.assign_score_limit = 5
-    assert_equal("", t.render!)
-  end
-
-  def test_assign_score_of_int
-    assert_equal(1, assign_score_of(123))
-  end
-
-  def test_assign_score_of_string_counts_bytes
-    assert_equal(3, assign_score_of('123'))
-    assert_equal(5, assign_score_of('12345'))
-    assert_equal(9, assign_score_of('すごい'))
-  end
-
-  def test_assign_score_of_array
-    assert_equal(1, assign_score_of([]))
-    assert_equal(2, assign_score_of([123]))
-    assert_equal(6, assign_score_of([123, 'abcd']))
-  end
-
-  def test_assign_score_of_hash
-    assert_equal(1, assign_score_of({}))
-    assert_equal(5, assign_score_of('int' => 123))
-    assert_equal(12, assign_score_of('int' => 123, 'str' => 'abcd'))
-  end
-
-  private
-
-  class ObjectWrapperDrop < Liquid::Drop
-    def initialize(obj)
-      @obj = obj
-    end
-
-    def value
-      @obj
-    end
-  end
-
-  def assign_score_of(obj)
-    context = Liquid::Context.new('drop' => ObjectWrapperDrop.new(obj))
-    Liquid::Template.parse('{% assign obj = drop.value %}').render!(context)
-    context.resource_limits.assign_score
-  end
-end
+end # AssignTest

test/integration/block_test.rb

@@ -14,7 +14,7 @@ class BlockTest < Minitest::Test
 
   def test_with_custom_tag
     with_custom_tag('testtag', Block) do
-      assert(Liquid::Template.parse("{% testtag %} {% endtesttag %}"))
+      assert Liquid::Template.parse("{% testtag %} {% endtesttag %}")
     end
   end
 
@@ -28,13 +28,13 @@ class BlockTest < Minitest::Test
     with_custom_tag('blabla', klass1) do
       template = Liquid::Template.parse("{% blabla %} bla {% endblabla %}")
 
-      assert_equal('hello', template.render)
+      assert_equal 'hello', template.render
 
       buf    = +''
       output = template.render({}, output: buf)
-      assert_equal('hello', output)
-      assert_equal('hello', buf)
-      assert_equal(buf.object_id, output.object_id)
+      assert_equal 'hello', output
+      assert_equal 'hello', buf
+      assert_equal buf.object_id, output.object_id
     end
 
     klass2 = Class.new(klass1) do
@@ -46,13 +46,13 @@ class BlockTest < Minitest::Test
     with_custom_tag('blabla', klass2) do
       template = Liquid::Template.parse("{% blabla %} foo {% endblabla %}")
 
-      assert_equal('foohellobar', template.render)
+      assert_equal 'foohellobar', template.render
 
       buf    = +''
       output = template.render({}, output: buf)
-      assert_equal('foohellobar', output)
-      assert_equal('foohellobar', buf)
-      assert_equal(buf.object_id, output.object_id)
+      assert_equal 'foohellobar', output
+      assert_equal 'foohellobar', buf
+      assert_equal buf.object_id, output.object_id
     end
   end
 end

test/integration/capture_test.rb

@@ -49,10 +49,4 @@ class CaptureTest < Minitest::Test
     rendered        = template.render!
     assert_equal("3-3", rendered.gsub(/\s/, ''))
   end
-
-  def test_increment_assign_score_by_bytes_not_characters
-    t = Template.parse("{% capture foo %}すごい{% endcapture %}")
-    t.render!
-    assert_equal(9, t.resource_limits.assign_score)
-  end
-end
+end # CaptureTest

test/integration/context_test

@@ -0,0 +1,608 @@
+# frozen_string_literal: true
+
+require 'test_helper'
+
+class HundredCentes
+  def to_liquid
+    100
+  end
+end
+
+class CentsDrop < Liquid::Drop
+  def amount
+    HundredCentes.new
+  end
+
+  def non_zero?
+    true
+  end
+end
+
+class ContextSensitiveDrop < Liquid::Drop
+  def test
+    @context['test']
+  end
+end
+
+class Category < Liquid::Drop
+  attr_accessor :name
+
+  def initialize(name)
+    @name = name
+  end
+
+  def to_liquid
+    CategoryDrop.new(self)
+  end
+end
+
+class CategoryDrop
+  attr_accessor :category, :context
+  def initialize(category)
+    @category = category
+  end
+end
+
+class CounterDrop < Liquid::Drop
+  def count
+    @count ||= 0
+    @count  += 1
+  end
+end
+
+class ArrayLike
+  def fetch(index)
+  end
+
+  def [](index)
+    @counts        ||= []
+    @counts[index] ||= 0
+    @counts[index]  += 1
+  end
+
+  def to_liquid
+    self
+  end
+end
+
+class ContextTest < Minitest::Test
+  include Liquid
+
+  def setup
+    @context = Liquid::Context.new
+  end
+
+  def test_variables
+    @context['string'] = 'string'
+    assert_equal('string', @context['string'])
+
+    @context['num'] = 5
+    assert_equal(5, @context['num'])
+
+    @context['time'] = Time.parse('2006-06-06 12:00:00')
+    assert_equal(Time.parse('2006-06-06 12:00:00'), @context['time'])
+
+    @context['date'] = Date.today
+    assert_equal(Date.today, @context['date'])
+
+    now = Time.now
+    @context['datetime'] = now
+    assert_equal(now, @context['datetime'])
+
+    @context['bool'] = true
+    assert_equal(true, @context['bool'])
+
+    @context['bool'] = false
+    assert_equal(false, @context['bool'])
+
+    @context['nil'] = nil
+    assert_nil(@context['nil'])
+    assert_nil(@context['nil'])
+  end
+
+  def test_variables_not_existing
+    assert_nil(@context['does_not_exist'])
+  end
+
+  def test_scoping
+    @context.push
+    @context.pop
+
+    assert_raises(Liquid::ContextError) do
+      @context.pop
+    end
+
+    assert_raises(Liquid::ContextError) do
+      @context.push
+      @context.pop
+      @context.pop
+    end
+  end
+
+  def test_length_query
+    @context['numbers'] = [1, 2, 3, 4]
+
+    assert_equal(4, @context['numbers.size'])
+
+    @context['numbers'] = { 1 => 1, 2 => 2, 3 => 3, 4 => 4 }
+
+    assert_equal(4, @context['numbers.size'])
+
+    @context['numbers'] = { 1 => 1, 2 => 2, 3 => 3, 4 => 4, 'size' => 1000 }
+
+    assert_equal(1000, @context['numbers.size'])
+  end
+
+  def test_hyphenated_variable
+    @context['oh-my'] = 'godz'
+    assert_equal('godz', @context['oh-my'])
+  end
+
+  def test_add_filter
+    filter = Module.new do
+      def hi(output)
+        output + ' hi!'
+      end
+    end
+
+    context = Context.new
+    context.add_filters(filter)
+    assert_equal('hi? hi!', context.invoke(:hi, 'hi?'))
+
+    context = Context.new
+    assert_equal('hi?', context.invoke(:hi, 'hi?'))
+
+    context.add_filters(filter)
+    assert_equal('hi? hi!', context.invoke(:hi, 'hi?'))
+  end
+
+  def test_only_intended_filters_make_it_there
+    filter = Module.new do
+      def hi(output)
+        output + ' hi!'
+      end
+    end
+
+    context = Context.new
+    assert_equal("Wookie", context.invoke("hi", "Wookie"))
+
+    context.add_filters(filter)
+    assert_equal("Wookie hi!", context.invoke("hi", "Wookie"))
+  end
+
+  def test_add_item_in_outer_scope
+    @context['test'] = 'test'
+    @context.push
+    assert_equal('test', @context['test'])
+    @context.pop
+    assert_equal('test', @context['test'])
+  end
+
+  def test_add_item_in_inner_scope
+    @context.push
+    @context['test'] = 'test'
+    assert_equal('test', @context['test'])
+    @context.pop
+    assert_nil(@context['test'])
+  end
+
+  def test_hierachical_data
+    @context['hash'] = { "name" => 'tobi' }
+    assert_equal('tobi', @context['hash.name'])
+    assert_equal('tobi', @context['hash["name"]'])
+  end
+
+  def test_keywords
+    assert_equal(true, @context['true'])
+    assert_equal(false, @context['false'])
+  end
+
+  def test_digits
+    assert_equal(100, @context['100'])
+    assert_equal(100.00, @context['100.00'])
+  end
+
+  def test_strings
+    assert_equal("hello!", @context['"hello!"'])
+    assert_equal("hello!", @context["'hello!'"])
+  end
+
+  def test_merge
+    @context.merge("test" => "test")
+    assert_equal('test', @context['test'])
+    @context.merge("test" => "newvalue", "foo" => "bar")
+    assert_equal('newvalue', @context['test'])
+    assert_equal('bar', @context['foo'])
+  end
+
+  def test_array_notation
+    @context['test'] = [1, 2, 3, 4, 5]
+
+    assert_equal(1, @context['test[0]'])
+    assert_equal(2, @context['test[1]'])
+    assert_equal(3, @context['test[2]'])
+    assert_equal(4, @context['test[3]'])
+    assert_equal(5, @context['test[4]'])
+  end
+
+  def test_recoursive_array_notation
+    @context['test'] = { 'test' => [1, 2, 3, 4, 5] }
+
+    assert_equal(1, @context['test.test[0]'])
+
+    @context['test'] = [{ 'test' => 'worked' }]
+
+    assert_equal('worked', @context['test[0].test'])
+  end
+
+  def test_hash_to_array_transition
+    @context['colors'] = {
+      'Blue' => ['003366', '336699', '6699CC', '99CCFF'],
+      'Green' => ['003300', '336633', '669966', '99CC99'],
+      'Yellow' => ['CC9900', 'FFCC00', 'FFFF99', 'FFFFCC'],
+      'Red' => ['660000', '993333', 'CC6666', 'FF9999'],
+    }
+
+    assert_equal('003366', @context['colors.Blue[0]'])
+    assert_equal('FF9999', @context['colors.Red[3]'])
+  end
+
+  def test_try_first
+    @context['test'] = [1, 2, 3, 4, 5]
+
+    assert_equal(1, @context['test.first'])
+    assert_equal(5, @context['test.last'])
+
+    @context['test'] = { 'test' => [1, 2, 3, 4, 5] }
+
+    assert_equal(1, @context['test.test.first'])
+    assert_equal(5, @context['test.test.last'])
+
+    @context['test'] = [1]
+    assert_equal(1, @context['test.first'])
+    assert_equal(1, @context['test.last'])
+  end
+
+  def test_access_hashes_with_hash_notation
+    @context['products'] = { 'count' => 5, 'tags' => ['deepsnow', 'freestyle'] }
+    @context['product']  = { 'variants' => [{ 'title' => 'draft151cm' }, { 'title' => 'element151cm' }] }
+
+    assert_equal(5, @context['products["count"]'])
+    assert_equal('deepsnow', @context['products["tags"][0]'])
+    assert_equal('deepsnow', @context['products["tags"].first'])
+    assert_equal('draft151cm', @context['product["variants"][0]["title"]'])
+    assert_equal('element151cm', @context['product["variants"][1]["title"]'])
+    assert_equal('draft151cm', @context['product["variants"][0]["title"]'])
+    assert_equal('element151cm', @context['product["variants"].last["title"]'])
+  end
+
+  def test_access_variable_with_hash_notation
+    @context['foo'] = 'baz'
+    @context['bar'] = 'foo'
+
+    assert_equal('baz', @context['["foo"]'])
+    assert_equal('baz', @context['[bar]'])
+  end
+
+  def test_access_hashes_with_hash_access_variables
+    @context['var']      = 'tags'
+    @context['nested']   = { 'var' => 'tags' }
+    @context['products'] = { 'count' => 5, 'tags' => ['deepsnow', 'freestyle'] }
+
+    assert_equal('deepsnow', @context['products[var].first'])
+    assert_equal('freestyle', @context['products[nested.var].last'])
+  end
+
+  def test_hash_notation_only_for_hash_access
+    @context['array'] = [1, 2, 3, 4, 5]
+    @context['hash']  = { 'first' => 'Hello' }
+
+    assert_equal(1, @context['array.first'])
+    assert_nil(@context['array["first"]'])
+    assert_equal('Hello', @context['hash["first"]'])
+  end
+
+  def test_first_can_appear_in_middle_of_callchain
+    @context['product'] = { 'variants' => [{ 'title' => 'draft151cm' }, { 'title' => 'element151cm' }] }
+
+    assert_equal('draft151cm', @context['product.variants[0].title'])
+    assert_equal('element151cm', @context['product.variants[1].title'])
+    assert_equal('draft151cm', @context['product.variants.first.title'])
+    assert_equal('element151cm', @context['product.variants.last.title'])
+  end
+
+  def test_cents
+    @context.merge("cents" => HundredCentes.new)
+    assert_equal(100, @context['cents'])
+  end
+
+  def test_nested_cents
+    @context.merge("cents" => { 'amount' => HundredCentes.new })
+    assert_equal(100, @context['cents.amount'])
+
+    @context.merge("cents" => { 'cents' => { 'amount' => HundredCentes.new } })
+    assert_equal(100, @context['cents.cents.amount'])
+  end
+
+  def test_cents_through_drop
+    @context.merge("cents" => CentsDrop.new)
+    assert_equal(100, @context['cents.amount'])
+  end
+
+  def test_nested_cents_through_drop
+    @context.merge("vars" => { "cents" => CentsDrop.new })
+    assert_equal(100, @context['vars.cents.amount'])
+  end
+
+  def test_drop_methods_with_question_marks
+    @context.merge("cents" => CentsDrop.new)
+    assert(@context['cents.non_zero?'])
+  end
+
+  def test_context_from_within_drop
+    @context.merge("test" => '123', "vars" => ContextSensitiveDrop.new)
+    assert_equal('123', @context['vars.test'])
+  end
+
+  def test_nested_context_from_within_drop
+    @context.merge("test" => '123', "vars" => { "local" => ContextSensitiveDrop.new })
+    assert_equal('123', @context['vars.local.test'])
+  end
+
+  def test_ranges
+    @context.merge("test" => '5')
+    assert_equal((1..5), @context['(1..5)'])
+    assert_equal((1..5), @context['(1..test)'])
+    assert_equal((5..5), @context['(test..test)'])
+  end
+
+  def test_cents_through_drop_nestedly
+    @context.merge("cents" => { "cents" => CentsDrop.new })
+    assert_equal(100, @context['cents.cents.amount'])
+
+    @context.merge("cents" => { "cents" => { "cents" => CentsDrop.new } })
+    assert_equal(100, @context['cents.cents.cents.amount'])
+  end
+
+  def test_drop_with_variable_called_only_once
+    @context['counter'] = CounterDrop.new
+
+    assert_equal(1, @context['counter.count'])
+    assert_equal(2, @context['counter.count'])
+    assert_equal(3, @context['counter.count'])
+  end
+
+  def test_drop_with_key_called_only_once
+    @context['counter'] = CounterDrop.new
+
+    assert_equal(1, @context['counter["count"]'])
+    assert_equal(2, @context['counter["count"]'])
+    assert_equal(3, @context['counter["count"]'])
+  end
+
+  def test_proc_as_variable
+    @context['dynamic'] = proc { 'Hello' }
+
+    assert_equal('Hello', @context['dynamic'])
+  end
+
+  def test_lambda_as_variable
+    @context['dynamic'] = proc { 'Hello' }
+
+    assert_equal('Hello', @context['dynamic'])
+  end
+
+  def test_nested_lambda_as_variable
+    @context['dynamic'] = { "lambda" => proc { 'Hello' } }
+
+    assert_equal('Hello', @context['dynamic.lambda'])
+  end
+
+  def test_array_containing_lambda_as_variable
+    @context['dynamic'] = [1, 2, proc { 'Hello' }, 4, 5]
+
+    assert_equal('Hello', @context['dynamic[2]'])
+  end
+
+  def test_lambda_is_called_once
+    @context['callcount'] = proc {
+      @global ||= 0
+      @global  += 1
+      @global.to_s
+    }
+
+    assert_equal('1', @context['callcount'])
+    assert_equal('1', @context['callcount'])
+    assert_equal('1', @context['callcount'])
+
+    @global = nil
+  end
+
+  def test_nested_lambda_is_called_once
+    @context['callcount'] = { "lambda" => proc {
+                                            @global ||= 0
+                                            @global  += 1
+                                            @global.to_s
+                                          } }
+
+    assert_equal('1', @context['callcount.lambda'])
+    assert_equal('1', @context['callcount.lambda'])
+    assert_equal('1', @context['callcount.lambda'])
+
+    @global = nil
+  end
+
+  def test_lambda_in_array_is_called_once
+    @context['callcount'] = [1, 2, proc {
+                                     @global ||= 0
+                                     @global  += 1
+                                     @global.to_s
+                                   }, 4, 5]
+
+    assert_equal('1', @context['callcount[2]'])
+    assert_equal('1', @context['callcount[2]'])
+    assert_equal('1', @context['callcount[2]'])
+
+    @global = nil
+  end
+
+  def test_access_to_context_from_proc
+    @context.registers[:magic] = 345392
+
+    @context['magic'] = proc { @context.registers[:magic] }
+
+    assert_equal(345392, @context['magic'])
+  end
+
+  def test_to_liquid_and_context_at_first_level
+    @context['category'] = Category.new("foobar")
+    assert_kind_of(CategoryDrop, @context['category'])
+    assert_equal(@context, @context['category'].context)
+  end
+
+  def test_interrupt_avoids_object_allocations
+    assert_no_object_allocations do
+      @context.interrupt?
+    end
+  end
+
+  def test_context_initialization_with_a_proc_in_environment
+    contx = Context.new([test: ->(c) { c['poutine'] }], test: :foo)
+
+    assert(contx)
+    assert_nil(contx['poutine'])
+  end
+
+  def test_apply_global_filter
+    global_filter_proc = ->(output) { "#{output} filtered" }
+
+    context = Context.new
+    context.global_filter = global_filter_proc
+
+    assert_equal('hi filtered', context.apply_global_filter('hi'))
+  end
+
+  def test_static_environments_are_read_with_lower_priority_than_environments
+    context = Context.build(
+      static_environments: { 'shadowed' => 'static', 'unshadowed' => 'static' },
+      environments: { 'shadowed' => 'dynamic' }
+    )
+
+    assert_equal('dynamic', context['shadowed'])
+    assert_equal('static', context['unshadowed'])
+  end
+
+  def test_apply_global_filter_when_no_global_filter_exist
+    context = Context.new
+    assert_equal('hi', context.apply_global_filter('hi'))
+  end
+
+  def test_new_isolated_subcontext_does_not_inherit_variables
+    super_context = Context.new
+    super_context['my_variable'] = 'some value'
+    subcontext = super_context.new_isolated_subcontext
+
+    assert_nil(subcontext['my_variable'])
+  end
+
+  def test_new_isolated_subcontext_inherits_static_environment
+    super_context = Context.build(static_environments: { 'my_environment_value' => 'my value' })
+    subcontext    = super_context.new_isolated_subcontext
+
+    assert_equal('my value', subcontext['my_environment_value'])
+  end
+
+  def test_new_isolated_subcontext_inherits_resource_limits
+    resource_limits = ResourceLimits.new({})
+    super_context   = Context.new({}, {}, {}, false, resource_limits)
+    subcontext      = super_context.new_isolated_subcontext
+    assert_equal(resource_limits, subcontext.resource_limits)
+  end
+
+  def test_new_isolated_subcontext_inherits_exception_renderer
+    super_context = Context.new
+    super_context.exception_renderer = ->(_e) { 'my exception message' }
+    subcontext = super_context.new_isolated_subcontext
+    assert_equal('my exception message', subcontext.handle_error(Liquid::Error.new))
+  end
+
+  def test_new_isolated_subcontext_does_not_inherit_non_static_registers
+    registers = {
+      my_register: :my_value,
+    }
+    super_context = Context.new({}, {}, StaticRegisters.new(registers))
+    super_context.registers[:my_register] = :my_alt_value
+    subcontext                            = super_context.new_isolated_subcontext
+    assert_equal(:my_value, subcontext.registers[:my_register])
+  end
+
+  def test_new_isolated_subcontext_inherits_static_registers
+    super_context = Context.build(registers: { my_register: :my_value })
+    subcontext    = super_context.new_isolated_subcontext
+    assert_equal(:my_value, subcontext.registers[:my_register])
+  end
+
+  def test_new_isolated_subcontext_registers_do_not_pollute_context
+    super_context                      = Context.build(registers: { my_register: :my_value })
+    subcontext                         = super_context.new_isolated_subcontext
+    subcontext.registers[:my_register] = :my_alt_value
+    assert_equal(:my_value, super_context.registers[:my_register])
+  end
+
+  def test_new_isolated_subcontext_inherits_filters
+    my_filter = Module.new do
+      def my_filter(*)
+        'my filter result'
+      end
+    end
+
+    super_context = Context.new
+    super_context.add_filters([my_filter])
+    subcontext    = super_context.new_isolated_subcontext
+    template      = Template.parse('{{ 123 | my_filter }}')
+    assert_equal('my filter result', template.render(subcontext))
+  end
+
+  def test_disables_tag_specified
+    context = Context.new
+    context.with_disabled_tags(%w(foo bar)) do
+      assert_equal true, context.tag_disabled?("foo")
+      assert_equal true, context.tag_disabled?("bar")
+      assert_equal false, context.tag_disabled?("unknown")
+    end
+  end
+
+  def test_disables_nested_tags
+    context = Context.new
+    context.with_disabled_tags(["foo"]) do
+      context.with_disabled_tags(["foo"]) do
+        assert_equal true, context.tag_disabled?("foo")
+        assert_equal false, context.tag_disabled?("bar")
+      end
+      context.with_disabled_tags(["bar"]) do
+        assert_equal true, context.tag_disabled?("foo")
+        assert_equal true, context.tag_disabled?("bar")
+        context.with_disabled_tags(["foo"]) do
+          assert_equal true, context.tag_disabled?("foo")
+          assert_equal true, context.tag_disabled?("bar")
+        end
+      end
+      assert_equal true, context.tag_disabled?("foo")
+      assert_equal false, context.tag_disabled?("bar")
+    end
+  end
+
+  private
+
+  def assert_no_object_allocations
+    unless RUBY_ENGINE == 'ruby'
+      skip("stackprof needed to count object allocations")
+    end
+    require 'stackprof'
+
+    profile = StackProf.run(mode: :object) do
+      yield
+    end
+    assert_equal(0, profile[:samples])
+  end
+end # ContextTest

test/integration/context_test.rb

@@ -24,7 +24,7 @@ class ContextSensitiveDrop < Liquid::Drop
   end
 end
 
-class Category
+class Category < Liquid::Drop
   attr_accessor :name
 
   def initialize(name)
@@ -36,9 +36,8 @@ class Category
   end
 end
 
-class CategoryDrop < Liquid::Drop
+class CategoryDrop
   attr_accessor :category, :context
-
   def initialize(category)
     @category = category
   end
@@ -406,42 +405,45 @@ class ContextTest < Minitest::Test
   end
 
   def test_lambda_is_called_once
-    @global = 0
-
     @context['callcount'] = proc {
-      @global += 1
+      @global ||= 0
+      @global  += 1
       @global.to_s
     }
 
     assert_equal('1', @context['callcount'])
     assert_equal('1', @context['callcount'])
     assert_equal('1', @context['callcount'])
+
+    @global = nil
   end
 
   def test_nested_lambda_is_called_once
-    @global = 0
-
     @context['callcount'] = { "lambda" => proc {
-                                            @global += 1
+                                            @global ||= 0
+                                            @global  += 1
                                             @global.to_s
                                           } }
 
     assert_equal('1', @context['callcount.lambda'])
     assert_equal('1', @context['callcount.lambda'])
     assert_equal('1', @context['callcount.lambda'])
+
+    @global = nil
   end
 
   def test_lambda_in_array_is_called_once
-    @global = 0
-
     @context['callcount'] = [1, 2, proc {
-                                     @global += 1
+                                     @global ||= 0
+                                     @global  += 1
                                      @global.to_s
                                    }, 4, 5]
 
     assert_equal('1', @context['callcount[2]'])
     assert_equal('1', @context['callcount[2]'])
     assert_equal('1', @context['callcount[2]'])
+
+    @global = nil
   end
 
   def test_access_to_context_from_proc
@@ -459,7 +461,6 @@ class ContextTest < Minitest::Test
   end
 
   def test_interrupt_avoids_object_allocations
-    @context.interrupt? # ruby 3.0.0 allocates on the first call
     assert_no_object_allocations do
       @context.interrupt?
     end
@@ -565,9 +566,9 @@ class ContextTest < Minitest::Test
   def test_disables_tag_specified
     context = Context.new
     context.with_disabled_tags(%w(foo bar)) do
-      assert_equal(true, context.tag_disabled?("foo"))
-      assert_equal(true, context.tag_disabled?("bar"))
-      assert_equal(false, context.tag_disabled?("unknown"))
+      assert_equal true, context.tag_disabled?("foo")
+      assert_equal true, context.tag_disabled?("bar")
+      assert_equal false, context.tag_disabled?("unknown")
     end
   end
 
@@ -575,19 +576,19 @@ class ContextTest < Minitest::Test
     context = Context.new
     context.with_disabled_tags(["foo"]) do
       context.with_disabled_tags(["foo"]) do
-        assert_equal(true, context.tag_disabled?("foo"))
-        assert_equal(false, context.tag_disabled?("bar"))
+        assert_equal true, context.tag_disabled?("foo")
+        assert_equal false, context.tag_disabled?("bar")
       end
       context.with_disabled_tags(["bar"]) do
-        assert_equal(true, context.tag_disabled?("foo"))
-        assert_equal(true, context.tag_disabled?("bar"))
+        assert_equal true, context.tag_disabled?("foo")
+        assert_equal true, context.tag_disabled?("bar")
         context.with_disabled_tags(["foo"]) do
-          assert_equal(true, context.tag_disabled?("foo"))
-          assert_equal(true, context.tag_disabled?("bar"))
+          assert_equal true, context.tag_disabled?("foo")
+          assert_equal true, context.tag_disabled?("bar")
         end
       end
-      assert_equal(true, context.tag_disabled?("foo"))
-      assert_equal(false, context.tag_disabled?("bar"))
+      assert_equal true, context.tag_disabled?("foo")
+      assert_equal false, context.tag_disabled?("bar")
     end
   end
 
@@ -605,16 +606,16 @@ class ContextTest < Minitest::Test
     end
 
     with_global_filter(global) do
-      assert_equal('Global test', Template.parse("{{'test' | notice }}").render!)
-      assert_equal('Local test', Template.parse("{{'test' | notice }}").render!({}, filters: [local]))
+      assert_equal 'Global test', Template.parse("{{'test' | notice }}").render!
+      assert_equal 'Local test', Template.parse("{{'test' | notice }}").render!({}, filters: [local])
     end
   end
 
   def test_has_key_will_not_add_an_error_for_missing_keys
-    with_error_mode(:strict) do
+    with_error_mode :strict do
       context = Context.new
       context.key?('unknown')
-      assert_empty(context.errors)
+      assert_empty context.errors
     end
   end
 

test/integration/drop_test.rb

@@ -167,7 +167,7 @@ class DropsTest < Minitest::Test
   def test_object_methods_not_allowed
     [:dup, :clone, :singleton_class, :eval, :class_eval, :inspect].each do |method|
       output = Liquid::Template.parse(" {{ product.#{method} }} ").render!('product' => ProductDrop.new)
-      assert_equal('  ', output)
+      assert_equal '  ', output
     end
   end
 
@@ -210,28 +210,28 @@ class DropsTest < Minitest::Test
 
   def test_enumerable_drop_will_invoke_liquid_method_missing_for_clashing_method_names
     ["select", "each", "map", "cycle"].each do |method|
-      assert_equal(method.to_s, Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => EnumerableDrop.new))
-      assert_equal(method.to_s, Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => EnumerableDrop.new))
-      assert_equal(method.to_s, Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => RealEnumerableDrop.new))
-      assert_equal(method.to_s, Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => RealEnumerableDrop.new))
+      assert_equal method.to_s, Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => EnumerableDrop.new)
+      assert_equal method.to_s, Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => EnumerableDrop.new)
+      assert_equal method.to_s, Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => RealEnumerableDrop.new)
+      assert_equal method.to_s, Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => RealEnumerableDrop.new)
     end
   end
 
   def test_some_enumerable_methods_still_get_invoked
     [:count, :max].each do |method|
-      assert_equal("3", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => RealEnumerableDrop.new))
-      assert_equal("3", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => RealEnumerableDrop.new))
-      assert_equal("3", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => EnumerableDrop.new))
-      assert_equal("3", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => EnumerableDrop.new))
+      assert_equal "3", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => RealEnumerableDrop.new)
+      assert_equal "3", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => RealEnumerableDrop.new)
+      assert_equal "3", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => EnumerableDrop.new)
+      assert_equal "3", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => EnumerableDrop.new)
     end
 
     assert_equal("yes", Liquid::Template.parse("{% if collection contains 3 %}yes{% endif %}").render!('collection' => RealEnumerableDrop.new))
 
     [:min, :first].each do |method|
-      assert_equal("1", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => RealEnumerableDrop.new))
-      assert_equal("1", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => RealEnumerableDrop.new))
-      assert_equal("1", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => EnumerableDrop.new))
-      assert_equal("1", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => EnumerableDrop.new))
+      assert_equal "1", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => RealEnumerableDrop.new)
+      assert_equal "1", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => RealEnumerableDrop.new)
+      assert_equal "1", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => EnumerableDrop.new)
+      assert_equal "1", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => EnumerableDrop.new)
     end
   end
 

test/integration/error_handling_test.rb

@@ -193,7 +193,7 @@ class ErrorHandlingTest < Minitest::Test
 
   # Liquid should not catch Exceptions that are not subclasses of StandardError, like Interrupt and NoMemoryError
   def test_exceptions_propagate
-    assert_raises(Exception) do
+    assert_raises Exception do
       template = Liquid::Template.parse('{{ errors.exception }}')
       template.render('errors' => ErrorDrop.new)
     end

test/integration/expression_test.rb

@@ -1,46 +0,0 @@
-# frozen_string_literal: true
-
-require 'test_helper'
-
-class ExpressionTest < Minitest::Test
-  def test_keyword_literals
-    assert_equal(true, parse_and_eval("true"))
-    assert_equal(true, parse_and_eval(" true "))
-  end
-
-  def test_string
-    assert_equal("single quoted", parse_and_eval("'single quoted'"))
-    assert_equal("double quoted", parse_and_eval('"double quoted"'))
-    assert_equal("spaced", parse_and_eval(" 'spaced' "))
-    assert_equal("spaced2", parse_and_eval(' "spaced2" '))
-  end
-
-  def test_int
-    assert_equal(123, parse_and_eval("123"))
-    assert_equal(456, parse_and_eval(" 456 "))
-    assert_equal(12, parse_and_eval("012"))
-  end
-
-  def test_float
-    assert_equal(1.5, parse_and_eval("1.5"))
-    assert_equal(2.5, parse_and_eval(" 2.5 "))
-  end
-
-  def test_range
-    assert_equal(1..2, parse_and_eval("(1..2)"))
-    assert_equal(3..4, parse_and_eval(" ( 3 .. 4 ) "))
-  end
-
-  private
-
-  def parse_and_eval(markup, **assigns)
-    if Liquid::Template.error_mode == :strict
-      p = Liquid::Parser.new(markup)
-      markup = p.expression
-      p.consume(:end_of_string)
-    end
-    expression = Liquid::Expression.parse(markup)
-    context = Liquid::Context.new(assigns)
-    context.evaluate(expression)
-  end
-end

test/integration/filter_kwarg_test.rb

@@ -1,24 +0,0 @@
-# frozen_string_literal: true
-
-require 'test_helper'
-
-class FilterKwargTest < Minitest::Test
-  module KwargFilter
-    def html_tag(_tag, attributes)
-      attributes
-        .map { |key, value| "#{key}='#{value}'" }
-        .join(' ')
-    end
-  end
-
-  include Liquid
-
-  def test_can_parse_data_kwargs
-    with_global_filter(KwargFilter) do
-      assert_equal(
-        "data-src='src' data-widths='100, 200'",
-        Template.parse("{{ 'img' | html_tag: data-src: 'src', data-widths: '100, 200' }}").render(nil, nil)
-      )
-    end
-  end
-end

test/integration/filter_test.rb

@@ -153,15 +153,6 @@ class FiltersTest < Minitest::Test
     # tap still treated as a non-existent filter
     assert_equal("1000", Template.parse("{{var | tap}}").render!('var' => 1000))
   end
-
-  def test_liquid_argument_error
-    source = "{{ '' | size: 'too many args' }}"
-    exc = assert_raises(Liquid::ArgumentError) do
-      Template.parse(source).render!
-    end
-    assert_match(/\ALiquid error: wrong number of arguments /, exc.message)
-    assert_equal(exc.message, Template.parse(source).render)
-  end
 end
 
 class FiltersInTemplate < Minitest::Test
@@ -169,9 +160,9 @@ class FiltersInTemplate < Minitest::Test
 
   def test_local_global
     with_global_filter(MoneyFilter) do
-      assert_equal(" 1000$ ", Template.parse("{{1000 | money}}").render!(nil, nil))
-      assert_equal(" 1000$ CAD ", Template.parse("{{1000 | money}}").render!(nil, filters: CanadianMoneyFilter))
-      assert_equal(" 1000$ CAD ", Template.parse("{{1000 | money}}").render!(nil, filters: [CanadianMoneyFilter]))
+      assert_equal " 1000$ ", Template.parse("{{1000 | money}}").render!(nil, nil)
+      assert_equal " 1000$ CAD ", Template.parse("{{1000 | money}}").render!(nil, filters: CanadianMoneyFilter)
+      assert_equal " 1000$ CAD ", Template.parse("{{1000 | money}}").render!(nil, filters: [CanadianMoneyFilter])
     end
   end
 

test/integration/hash_ordering_test.rb

@@ -19,7 +19,7 @@ class HashOrderingTest < Minitest::Test
 
   def test_global_register_order
     with_global_filter(MoneyFilter, CanadianMoneyFilter) do
-      assert_equal(" 1000$ CAD ", Template.parse("{{1000 | money}}").render(nil, nil))
+      assert_equal " 1000$ CAD ", Template.parse("{{1000 | money}}").render(nil, nil)
     end
   end
 end

test/integration/parsing_quirks_test.rb

@@ -32,7 +32,7 @@ class ParsingQuirksTest < Minitest::Test
     assert(Template.parse("{{test}}"))
 
     with_error_mode(:lax) do
-      assert(Template.parse("{{|test}}"))
+      assert Template.parse("{{|test}}")
     end
 
     with_error_mode(:strict) do
@@ -118,16 +118,6 @@ class ParsingQuirksTest < Minitest::Test
     end
   end
 
-  def test_blank_variable_markup
-    assert_template_result('', "{{}}")
-  end
-
-  def test_lookup_on_var_with_literal_name
-    assigns = { "blank" => { "x" => "result" } }
-    assert_template_result('result', "{{ blank.x }}", assigns)
-    assert_template_result('result', "{{ blank['x'] }}", assigns)
-  end
-
   def test_contains_in_id
     assert_template_result(' YES ', '{% if containsallshipments == true %} YES {% endif %}', 'containsallshipments' => true)
   end

test/integration/render_profiling_test.rb

@@ -2,28 +2,7 @@
 
 require 'test_helper'
 
-class ProfilerTest < Minitest::Test
-  class TestDrop < Liquid::Drop
-    def initialize(value)
-      super()
-      @value = value
-    end
-
-    def to_s
-      artificial_execution_time
-
-      @value
-    end
-
-    private
-
-    # Monotonic clock precision fluctuate based on the operating system
-    # By introducing a small sleep we ensure ourselves to register a non zero unit of time
-    def artificial_execution_time
-      sleep(Process.clock_getres(Process::CLOCK_MONOTONIC))
-    end
-  end
-
+class RenderProfilingTest < Minitest::Test
   include Liquid
 
   class ProfilingFileSystem
@@ -83,17 +62,6 @@ class ProfilerTest < Minitest::Test
     assert_equal(2, included_children[1].line_number)
   end
 
-  def test_profiling_render_tag
-    t = Template.parse("{% render 'a_template' %}", profile: true)
-    t.render!
-
-    render_children = t.profiler[0].children
-    render_children.each do |timing|
-      assert_equal('a_template', timing.partial)
-    end
-    assert_equal([1, 2], render_children.map(&:line_number))
-  end
-
   def test_profiling_times_the_rendering_of_tokens
     t = Template.parse("{% include 'a_template' %}", profile: true)
     t.render!
@@ -109,37 +77,6 @@ class ProfilerTest < Minitest::Test
     assert(t.profiler.total_render_time >= 0, "Total render time was not calculated")
   end
 
-  class SleepTag < Liquid::Tag
-    def initialize(tag_name, markup, parse_context)
-      super
-      @duration = Float(markup)
-    end
-
-    def render_to_output_buffer(_context, _output)
-      sleep(@duration)
-    end
-  end
-
-  def test_profiling_multiple_renders
-    with_custom_tag('sleep', SleepTag) do
-      context = Liquid::Context.new
-      t = Liquid::Template.parse("{% sleep 0.001 %}", profile: true)
-      context.template_name = 'index'
-      t.render!(context)
-      context.template_name = 'layout'
-      first_render_time = context.profiler.total_time
-      t.render!(context)
-
-      profiler = context.profiler
-      children = profiler.children
-      assert_operator(first_render_time, :>=, 0.001)
-      assert_operator(profiler.total_time, :>=, 0.001 + first_render_time)
-      assert_equal(["index", "layout"], children.map(&:template_name))
-      assert_equal([nil, nil], children.map(&:code))
-      assert_equal(profiler.total_time, children.map(&:total_time).reduce(&:+))
-    end
-  end
-
   def test_profiling_uses_include_to_mark_children
     t = Template.parse("{{ 'a string' | upcase }}\n{% include 'a_template' %}", profile: true)
     t.render!
@@ -154,7 +91,7 @@ class ProfilerTest < Minitest::Test
 
     include_node = t.profiler[1]
     include_node.children.each do |child|
-      assert_equal("a_template", child.partial)
+      assert_equal "a_template", child.partial
     end
   end
 
@@ -164,12 +101,12 @@ class ProfilerTest < Minitest::Test
 
     a_template = t.profiler[1]
     a_template.children.each do |child|
-      assert_equal("a_template", child.partial)
+      assert_equal "a_template", child.partial
     end
 
     b_template = t.profiler[2]
     b_template.children.each do |child|
-      assert_equal("b_template", child.partial)
+      assert_equal "b_template", child.partial
     end
   end
 
@@ -179,12 +116,12 @@ class ProfilerTest < Minitest::Test
 
     a_template1 = t.profiler[1]
     a_template1.children.each do |child|
-      assert_equal("a_template", child.partial)
+      assert_equal "a_template", child.partial
     end
 
     a_template2 = t.profiler[2]
     a_template2.children.each do |child|
-      assert_equal("a_template", child.partial)
+      assert_equal "a_template", child.partial
     end
   end
 
@@ -219,22 +156,16 @@ class ProfilerTest < Minitest::Test
 
   def test_profiling_supports_self_time
     t = Template.parse("{% for item in collection %} {{ item }} {% endfor %}", profile: true)
-    collection = [
-      TestDrop.new("one"),
-      TestDrop.new("two"),
-    ]
-    output = t.render!("collection" => collection)
-    assert_equal(" one  two ", output)
-
+    t.render!("collection" => ["one", "two"])
     leaf = t.profiler[0].children[0]
-    assert_operator(leaf.self_time, :>, 0.0)
+
+    assert_operator(leaf.self_time, :>, 0)
   end
 
   def test_profiling_supports_total_time
-    t = Template.parse("{% if true %} {{ test }} {% endif %}", profile: true)
-    output = t.render!("test" => TestDrop.new("one"))
-    assert_equal(" one ", output)
+    t = Template.parse("{% if true %} {% increment test %} {{ test }} {% endif %}", profile: true)
+    t.render!
 
-    assert_operator(t.profiler[0].total_time, :>, 0.0)
+    assert_operator(t.profiler[0].total_time, :>, 0)
   end
 end

test/integration/standard_filter_test.rb

@@ -3,6 +3,10 @@
 
 require 'test_helper'
 
+class Filters
+  include Liquid::StandardFilters
+end
+
 class TestThing
   attr_reader :foo
 
@@ -25,24 +29,8 @@ class TestThing
 end
 
 class TestDrop < Liquid::Drop
-  def initialize(value:)
-    @value = value
-  end
-
-  attr_reader :value
-
-  def registers
-    @context.registers
-  end
-end
-
-class TestModel
-  def initialize(value:)
-    @value = value
-  end
-
-  def to_liquid
-    TestDrop.new(value: @value)
+  def test
+    "testfoo"
   end
 end
 
@@ -65,13 +53,10 @@ class NumberLikeThing < Liquid::Drop
 end
 
 class StandardFiltersTest < Minitest::Test
-  Filters = Class.new(Liquid::StrainerTemplate)
-  Filters.add_filter(Liquid::StandardFilters)
-
   include Liquid
 
   def setup
-    @filters = Filters.new(Context.new)
+    @filters = Filters.new
   end
 
   def test_size
@@ -160,40 +145,6 @@ class StandardFiltersTest < Minitest::Test
     assert_equal('&lt;strong&gt;Hulk&lt;/strong&gt;', @filters.escape_once('&lt;strong&gt;Hulk</strong>'))
   end
 
-  def test_base64_encode
-    assert_equal('b25lIHR3byB0aHJlZQ==', @filters.base64_encode('one two three'))
-    assert_equal('', @filters.base64_encode(nil))
-  end
-
-  def test_base64_decode
-    assert_equal('one two three', @filters.base64_decode('b25lIHR3byB0aHJlZQ=='))
-
-    exception = assert_raises(Liquid::ArgumentError) do
-      @filters.base64_decode("invalidbase64")
-    end
-
-    assert_equal('Liquid error: invalid base64 provided to base64_decode', exception.message)
-  end
-
-  def test_base64_url_safe_encode
-    assert_equal(
-      'YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXogQUJDREVGR0hJSktMTU5PUFFSU1RVVldYWVogMTIzNDU2Nzg5MCAhQCMkJV4mKigpLT1fKy8_Ljo7W117fVx8',
-      @filters.base64_url_safe_encode('abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890 !@#$%^&*()-=_+/?.:;[]{}\|')
-    )
-    assert_equal('', @filters.base64_url_safe_encode(nil))
-  end
-
-  def test_base64_url_safe_decode
-    assert_equal(
-      'abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890 !@#$%^&*()-=_+/?.:;[]{}\|',
-      @filters.base64_url_safe_decode('YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXogQUJDREVGR0hJSktMTU5PUFFSU1RVVldYWVogMTIzNDU2Nzg5MCAhQCMkJV4mKigpLT1fKy8_Ljo7W117fVx8')
-    )
-    exception = assert_raises(Liquid::ArgumentError) do
-      @filters.base64_url_safe_decode("invalidbase64")
-    end
-    assert_equal('Liquid error: invalid base64 provided to base64_url_safe_decode', exception.message)
-  end
-
   def test_url_encode
     assert_equal('foo%2B1%40example.com', @filters.url_encode('[email protected]'))
     assert_equal('1', @filters.url_encode(1))
@@ -208,7 +159,7 @@ class StandardFiltersTest < Minitest::Test
     assert_equal('1', @filters.url_decode(1))
     assert_equal('2001-02-03', @filters.url_decode(Date.new(2001, 2, 3)))
     assert_nil(@filters.url_decode(nil))
-    exception = assert_raises(Liquid::ArgumentError) do
+    exception = assert_raises Liquid::ArgumentError do
       @filters.url_decode('%ff')
     end
     assert_equal('Liquid error: invalid byte sequence in UTF-8', exception.message)
@@ -220,17 +171,10 @@ class StandardFiltersTest < Minitest::Test
     assert_equal('one two three', @filters.truncatewords('one two three'))
     assert_equal(
       'Two small (13&#8221; x 5.5&#8221; x 10&#8221; high) baskets fit inside one large basket (13&#8221;...',
-      @filters.truncatewords('Two small (13&#8221; x 5.5&#8221; x 10&#8221; high) baskets fit inside one large basket (13&#8221; x 16&#8221; x 10.5&#8221; high) with cover.', 15)
+        @filters.truncatewords('Two small (13&#8221; x 5.5&#8221; x 10&#8221; high) baskets fit inside one large basket (13&#8221; x 16&#8221; x 10.5&#8221; high) with cover.', 15)
     )
     assert_equal("测试测试测试测试", @filters.truncatewords('测试测试测试测试', 5))
     assert_equal('one two1', @filters.truncatewords("one two three", 2, 1))
-    assert_equal('one two three...', @filters.truncatewords("one  two\tthree\nfour", 3))
-    assert_equal('one two...', @filters.truncatewords("one two three four", 2))
-    assert_equal('one...', @filters.truncatewords("one two three four", 0))
-    exception = assert_raises(Liquid::ArgumentError) do
-      @filters.truncatewords("one two three four", 1 << 31)
-    end
-    assert_equal("Liquid error: integer #{1 << 31} too big for truncatewords", exception.message)
   end
 
   def test_strip_html
@@ -274,8 +218,8 @@ class StandardFiltersTest < Minitest::Test
       { "price" => 1, "handle" => "gamma" },
       { "price" => 2, "handle" => "epsilon" },
       { "price" => 4, "handle" => "alpha" },
-      { "handle" => "beta" },
       { "handle" => "delta" },
+      { "handle" => "beta" },
     ]
     assert_equal(expectation, @filters.sort(input, "price"))
   end
@@ -342,7 +286,7 @@ class StandardFiltersTest < Minitest::Test
       [3],
     ]
 
-    assert_raises(Liquid::ArgumentError) do
+    assert_raises Liquid::ArgumentError do
       @filters.sort(foo, "bar")
     end
   end
@@ -358,7 +302,7 @@ class StandardFiltersTest < Minitest::Test
       [3],
     ]
 
-    assert_raises(Liquid::ArgumentError) do
+    assert_raises Liquid::ArgumentError do
       @filters.sort_natural(foo, "bar")
     end
   end
@@ -378,9 +322,8 @@ class StandardFiltersTest < Minitest::Test
     assert_equal(["foo"], @filters.uniq("foo"))
     assert_equal([1, 3, 2, 4], @filters.uniq([1, 1, 3, 2, 3, 1, 4, 3, 2, 1]))
     assert_equal([{ "a" => 1 }, { "a" => 3 }, { "a" => 2 }], @filters.uniq([{ "a" => 1 }, { "a" => 3 }, { "a" => 1 }, { "a" => 2 }], "a"))
-    test_drop = TestDrop.new(value: "test")
-    test_drop_alternate = TestDrop.new(value: "test")
-    assert_equal([test_drop], @filters.uniq([test_drop, test_drop_alternate], 'value'))
+    testdrop = TestDrop.new
+    assert_equal([testdrop], @filters.uniq([testdrop, TestDrop.new], 'test'))
   end
 
   def test_uniq_empty_array
@@ -394,7 +337,7 @@ class StandardFiltersTest < Minitest::Test
       [3],
     ]
 
-    assert_raises(Liquid::ArgumentError) do
+    assert_raises Liquid::ArgumentError do
       @filters.uniq(foo, "bar")
     end
   end
@@ -410,7 +353,7 @@ class StandardFiltersTest < Minitest::Test
       [3],
     ]
 
-    assert_raises(Liquid::ArgumentError) do
+    assert_raises Liquid::ArgumentError do
       @filters.compact(foo, "bar")
     end
   end
@@ -439,16 +382,6 @@ class StandardFiltersTest < Minitest::Test
     assert_template_result("woot: 1", '{{ foo | map: "whatever" }}', "foo" => [t])
   end
 
-  def test_map_calls_context=
-    model = TestModel.new(value: "test")
-
-    template = Template.parse('{{ foo | map: "registers" }}')
-    template.registers[:test] = 1234
-    template.assigns['foo'] = [model]
-
-    assert_template_result("{:test=>1234}", template.render!)
-  end
-
   def test_map_on_hashes
     assert_template_result("4217", '{{ thing | map: "foo" | map: "bar" }}',
       "thing" => { "foo" => [{ "bar" => 42 }, { "bar" => 17 }] })
@@ -467,9 +400,9 @@ class StandardFiltersTest < Minitest::Test
   end
 
   def test_map_over_proc
-    drop  = TestDrop.new(value: "testfoo")
+    drop  = TestDrop.new
     p     = proc { drop }
-    templ = '{{ procs | map: "value" }}'
+    templ = '{{ procs | map: "test" }}'
     assert_template_result("testfoo", templ, "procs" => [p])
   end
 
@@ -497,7 +430,7 @@ class StandardFiltersTest < Minitest::Test
       [3],
     ]
 
-    assert_raises(Liquid::ArgumentError) do
+    assert_raises Liquid::ArgumentError do
       @filters.map(foo, "bar")
     end
   end
@@ -508,7 +441,7 @@ class StandardFiltersTest < Minitest::Test
       [2],
       [3],
     ]
-    assert_raises(Liquid::ArgumentError) do
+    assert_raises Liquid::ArgumentError do
       @filters.map(foo, nil)
     end
   end
@@ -552,8 +485,8 @@ class StandardFiltersTest < Minitest::Test
     assert_equal('', @filters.date('', "%B"))
 
     with_timezone("UTC") do
-      assert_equal("07/05/2006", @filters.date(1152098955, "%m/%d/%Y"))
-      assert_equal("07/05/2006", @filters.date("1152098955", "%m/%d/%Y"))
+      assert_equal "07/05/2006", @filters.date(1152098955, "%m/%d/%Y")
+      assert_equal "07/05/2006", @filters.date("1152098955", "%m/%d/%Y")
     end
   end
 
@@ -565,31 +498,19 @@ class StandardFiltersTest < Minitest::Test
   end
 
   def test_replace
-    assert_equal('b b b b', @filters.replace('a a a a', 'a', 'b'))
+    assert_equal('2 2 2 2', @filters.replace('1 1 1 1', '1', 2))
     assert_equal('2 2 2 2', @filters.replace('1 1 1 1', 1, 2))
-    assert_equal('1 1 1 1', @filters.replace('1 1 1 1', 2, 3))
-    assert_template_result('2 2 2 2', "{{ '1 1 1 1' | replace: '1', 2 }}")
-
-    assert_equal('b a a a', @filters.replace_first('a a a a', 'a', 'b'))
+    assert_equal('2 1 1 1', @filters.replace_first('1 1 1 1', '1', 2))
     assert_equal('2 1 1 1', @filters.replace_first('1 1 1 1', 1, 2))
-    assert_equal('1 1 1 1', @filters.replace_first('1 1 1 1', 2, 3))
     assert_template_result('2 1 1 1', "{{ '1 1 1 1' | replace_first: '1', 2 }}")
-
-    assert_equal('a a a b', @filters.replace_last('a a a a', 'a', 'b'))
-    assert_equal('1 1 1 2', @filters.replace_last('1 1 1 1', 1, 2))
-    assert_equal('1 1 1 1', @filters.replace_last('1 1 1 1', 2, 3))
-    assert_template_result('1 1 1 2', "{{ '1 1 1 1' | replace_last: '1', 2 }}")
   end
 
   def test_remove
     assert_equal('   ', @filters.remove("a a a a", 'a'))
-    assert_template_result('   ', "{{ '1 1 1 1' | remove: 1 }}")
-
-    assert_equal('b a a', @filters.remove_first("a b a a", 'a '))
-    assert_template_result(' 1 1 1', "{{ '1 1 1 1' | remove_first: 1 }}")
-
-    assert_equal('a a b', @filters.remove_last("a a b a", ' a'))
-    assert_template_result('1 1 1 ', "{{ '1 1 1 1' | remove_last: 1 }}")
+    assert_equal('   ', @filters.remove("1 1 1 1", 1))
+    assert_equal('a a a', @filters.remove_first("a a a a", 'a '))
+    assert_equal(' 1 1 1', @filters.remove_first("1 1 1 1", 1))
+    assert_template_result('a a a', "{{ 'a a a a' | remove_first: 'a ' }}")
   end
 
   def test_pipes_in_string_arguments
@@ -618,7 +539,6 @@ class StandardFiltersTest < Minitest::Test
 
   def test_newlines_to_br
     assert_template_result("a<br />\nb<br />\nc", "{{ source | newline_to_br }}", 'source' => "a\nb\nc")
-    assert_template_result("a<br />\nb<br />\nc", "{{ source | newline_to_br }}", 'source' => "a\r\nb\nc")
   end
 
   def test_plus
@@ -667,7 +587,7 @@ class StandardFiltersTest < Minitest::Test
 
     assert_template_result("0.5", "{{ 2.0 | divided_by:4 }}")
     assert_raises(Liquid::ZeroDivisionError) do
-      assert_template_result("4", "{{ 1 | modulo: 0 }}")
+      assert_template_result "4", "{{ 1 | modulo: 0 }}"
     end
 
     assert_template_result("5", "{{ price | divided_by:2 }}", 'price' => NumberLikeThing.new(10))
@@ -676,7 +596,7 @@ class StandardFiltersTest < Minitest::Test
   def test_modulo
     assert_template_result("1", "{{ 3 | modulo:2 }}")
     assert_raises(Liquid::ZeroDivisionError) do
-      assert_template_result("4", "{{ 1 | modulo: 0 }}")
+      assert_template_result "4", "{{ 1 | modulo: 0 }}"
     end
 
     assert_template_result("1", "{{ price | modulo:2 }}", 'price' => NumberLikeThing.new(3))
@@ -687,7 +607,7 @@ class StandardFiltersTest < Minitest::Test
     assert_template_result("4", "{{ '4.3' | round }}")
     assert_template_result("4.56", "{{ input | round: 2 }}", 'input' => 4.5612)
     assert_raises(Liquid::FloatDomainError) do
-      assert_template_result("4", "{{ 1.0 | divided_by: 0.0 | round }}")
+      assert_template_result "4", "{{ 1.0 | divided_by: 0.0 | round }}"
     end
 
     assert_template_result("5", "{{ price | round }}", 'price' => NumberLikeThing.new(4.6))
@@ -698,7 +618,7 @@ class StandardFiltersTest < Minitest::Test
     assert_template_result("5", "{{ input | ceil }}", 'input' => 4.6)
     assert_template_result("5", "{{ '4.3' | ceil }}")
     assert_raises(Liquid::FloatDomainError) do
-      assert_template_result("4", "{{ 1.0 | divided_by: 0.0 | ceil }}")
+      assert_template_result "4", "{{ 1.0 | divided_by: 0.0 | ceil }}"
     end
 
     assert_template_result("5", "{{ price | ceil }}", 'price' => NumberLikeThing.new(4.6))
@@ -708,7 +628,7 @@ class StandardFiltersTest < Minitest::Test
     assert_template_result("4", "{{ input | floor }}", 'input' => 4.6)
     assert_template_result("4", "{{ '4.3' | floor }}")
     assert_raises(Liquid::FloatDomainError) do
-      assert_template_result("4", "{{ 1.0 | divided_by: 0.0 | floor }}")
+      assert_template_result "4", "{{ 1.0 | divided_by: 0.0 | floor }}"
     end
 
     assert_template_result("5", "{{ price | floor }}", 'price' => NumberLikeThing.new(5.4))
@@ -766,8 +686,6 @@ class StandardFiltersTest < Minitest::Test
     assert_equal("bar", @filters.default([], "bar"))
     assert_equal("bar", @filters.default({}, "bar"))
     assert_template_result('bar', "{{ false | default: 'bar' }}")
-    assert_template_result('bar', "{{ drop | default: 'bar' }}", 'drop' => BooleanDrop.new(false))
-    assert_template_result('Yay', "{{ drop | default: 'bar' }}", 'drop' => BooleanDrop.new(true))
   end
 
   def test_default_handle_false
@@ -778,8 +696,6 @@ class StandardFiltersTest < Minitest::Test
     assert_equal("bar", @filters.default([], "bar", "allow_false" => true))
     assert_equal("bar", @filters.default({}, "bar", "allow_false" => true))
     assert_template_result('false', "{{ false | default: 'bar', allow_false: true }}")
-    assert_template_result('Nay', "{{ drop | default: 'bar', allow_false: true }}", 'drop' => BooleanDrop.new(false))
-    assert_template_result('Yay', "{{ drop | default: 'bar', allow_false: true }}", 'drop' => BooleanDrop.new(true))
   end
 
   def test_cannot_access_private_methods
@@ -808,18 +724,6 @@ class StandardFiltersTest < Minitest::Test
     assert_equal(expectation, @filters.where(input, "ok"))
   end
 
-  def test_where_string_keys
-    input = [
-      "alpha", "beta", "gamma", "delta"
-    ]
-
-    expectation = [
-      "beta",
-    ]
-
-    assert_equal(expectation, @filters.where(input, "be"))
-  end
-
   def test_where_no_key_set
     input = [
       { "handle" => "alpha", "ok" => true },
@@ -865,7 +769,7 @@ class StandardFiltersTest < Minitest::Test
   end
 
   def test_all_filters_never_raise_non_liquid_exception
-    test_drop = TestDrop.new(value: "test")
+    test_drop = TestDrop.new
     test_drop.context = Context.new
     test_enum = TestEnumerable.new
     test_enum.context = Context.new
@@ -890,14 +794,19 @@ class StandardFiltersTest < Minitest::Test
       { 1 => "bar" },
       ["foo", 123, nil, true, false, Drop, ["foo"], { foo: "bar" }],
     ]
-    StandardFilters.public_instance_methods(false).each do |method|
-      arg_count = @filters.method(method).arity
-      arg_count *= -1 if arg_count < 0
-
-      test_types.repeated_permutation(arg_count) do |args|
-        @filters.send(method, *args)
-      rescue Liquid::Error
-        nil
+    test_types.each do |first|
+      test_types.each do |other|
+        (@filters.methods - Object.methods).each do |method|
+          arg_count = @filters.method(method).arity
+          arg_count *= -1 if arg_count < 0
+          inputs = [first]
+          inputs << ([other] * (arg_count - 1)) if arg_count > 1
+          begin
+            @filters.send(method, *inputs)
+          rescue Liquid::ArgumentError, Liquid::ZeroDivisionError
+            nil
+          end
+        end
       end
     end
   end

test/integration/tag/disableable_test.rb

@@ -5,44 +5,36 @@ require 'test_helper'
 class TagDisableableTest < Minitest::Test
   include Liquid
 
-  module RenderTagName
-    def render(_context)
-      tag_name
-    end
+  class DisableRaw < Block
+    disable_tags "raw"
   end
 
-  class Custom < Tag
+  class DisableRawEcho < Block
+    disable_tags "raw", "echo"
+  end
+
+  class DisableableRaw < Liquid::Raw
     prepend Liquid::Tag::Disableable
-    include RenderTagName
   end
 
-  class Custom2 < Tag
+  class DisableableEcho < Liquid::Echo
     prepend Liquid::Tag::Disableable
-    include RenderTagName
   end
 
-  class DisableCustom < Block
-    disable_tags "custom"
-  end
-
-  class DisableBoth < Block
-    disable_tags "custom", "custom2"
-  end
-
-  def test_block_tag_disabling_nested_tag
+  def test_disables_raw
     with_disableable_tags do
-      with_custom_tag('disable', DisableCustom) do
-        output = Template.parse('{% disable %}{% custom %};{% custom2 %}{% enddisable %}').render
-        assert_equal('Liquid error: custom usage is not allowed in this context;custom2', output)
+      with_custom_tag('disable', DisableRaw) do
+        output = Template.parse('{% disable %}{% raw %}Foobar{% endraw %}{% echo "foo" %}{% enddisable %}').render
+        assert_equal('Liquid error: raw usage is not allowed in this contextfoo', output)
       end
     end
   end
 
-  def test_block_tag_disabling_multiple_nested_tags
+  def test_disables_echo_and_raw
     with_disableable_tags do
-      with_custom_tag('disable', DisableBoth) do
-        output = Template.parse('{% disable %}{% custom %};{% custom2 %}{% enddisable %}').render
-        assert_equal('Liquid error: custom usage is not allowed in this context;Liquid error: custom2 usage is not allowed in this context', output)
+      with_custom_tag('disable', DisableRawEcho) do
+        output = Template.parse('{% disable %}{% raw %}Foobar{% endraw %}{% echo "foo" %}{% enddisable %}').render
+        assert_equal('Liquid error: raw usage is not allowed in this contextLiquid error: echo usage is not allowed in this context', output)
       end
     end
   end
@@ -50,8 +42,8 @@ class TagDisableableTest < Minitest::Test
   private
 
   def with_disableable_tags
-    with_custom_tag('custom', Custom) do
-      with_custom_tag('custom2', Custom2) do
+    with_custom_tag('raw', DisableableRaw) do
+      with_custom_tag('echo', DisableableEcho) do
         yield
       end
     end

test/integration/tag_test.rb

@@ -15,13 +15,13 @@ class TagTest < Minitest::Test
     with_custom_tag('blabla', klass1) do
       template = Liquid::Template.parse("{% blabla %}")
 
-      assert_equal('hello', template.render)
+      assert_equal 'hello', template.render
 
       buf    = +''
       output = template.render({}, output: buf)
-      assert_equal('hello', output)
-      assert_equal('hello', buf)
-      assert_equal(buf.object_id, output.object_id)
+      assert_equal 'hello', output
+      assert_equal 'hello', buf
+      assert_equal buf.object_id, output.object_id
     end
 
     klass2 = Class.new(klass1) do
@@ -33,13 +33,13 @@ class TagTest < Minitest::Test
     with_custom_tag('blabla', klass2) do
       template = Liquid::Template.parse("{% blabla %}")
 
-      assert_equal('foohellobar', template.render)
+      assert_equal 'foohellobar', template.render
 
       buf    = +''
       output = template.render({}, output: buf)
-      assert_equal('foohellobar', output)
-      assert_equal('foohellobar', buf)
-      assert_equal(buf.object_id, output.object_id)
+      assert_equal 'foohellobar', output
+      assert_equal 'foohellobar', buf
+      assert_equal buf.object_id, output.object_id
     end
   end
 end

test/integration/tags/for_tag_test.rb

@@ -437,30 +437,4 @@ HERE
 
     assert(context.registers[:for_stack].empty?)
   end
-
-  def test_instrument_for_offset_continue
-    assert_usage_increment('for_offset_continue') do
-      Template.parse('{% for item in items offset:continue %}{{item}}{% endfor %}')
-    end
-
-    assert_usage_increment('for_offset_continue', times: 0) do
-      Template.parse('{% for item in items offset:2 %}{{item}}{% endfor %}')
-    end
-  end
-
-  def test_instrument_forloop_drop_name
-    assigns = { 'items' => [1, 2, 3, 4, 5] }
-
-    assert_usage_increment('forloop_drop_name', times: 5) do
-      Template.parse('{% for item in items %}{{forloop.name}}{% endfor %}').render!(assigns)
-    end
-
-    assert_usage_increment('forloop_drop_name', times: 0) do
-      Template.parse('{% for item in items %}{{forloop.index}}{% endfor %}').render!(assigns)
-    end
-
-    assert_usage_increment('forloop_drop_name', times: 0) do
-      Template.parse('{% for item in items %}{{item}}{% endfor %}').render!(assigns)
-    end
-  end
 end

test/integration/tags/if_else_tag_test.rb

@@ -184,7 +184,7 @@ class IfElseTagTest < Minitest::Test
     tests.each do |vals, expected|
       a, b, c = vals
       assigns = { 'a' => a, 'b' => b, 'c' => c }
-      assert_template_result(expected.to_s, tpl, assigns, assigns.to_s)
+      assert_template_result expected.to_s, tpl, assigns, assigns.to_s
     end
   end
 end

test/integration/tags/include_tag_test.rb

@@ -96,12 +96,12 @@ class IncludeTagTest < Minitest::Test
 
   def test_include_tag_with_alias
     assert_template_result("Product: Draft 151cm ",
-      "{% include 'product_alias' with products[0] as product %}", "products" => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }])
+                           "{% include 'product_alias' with products[0] as product %}", "products" => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }])
   end
 
   def test_include_tag_for_alias
     assert_template_result("Product: Draft 151cm Product: Element 155cm ",
-      "{% include 'product_alias' for products as product %}", "products" => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }])
+                           "{% include 'product_alias' for products as product %}", "products" => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }])
   end
 
   def test_include_tag_with_default_name
@@ -226,13 +226,13 @@ class IncludeTagTest < Minitest::Test
       Template.parse("{% include template %}", error_mode: :strict).render!("template" => '{{ "X" || downcase }}')
     end
     with_error_mode(:lax) do
-      assert_equal('x', Template.parse("{% include template %}", error_mode: :strict, include_options_blacklist: true).render!("template" => '{{ "X" || downcase }}'))
+      assert_equal 'x', Template.parse("{% include template %}", error_mode: :strict, include_options_blacklist: true).render!("template" => '{{ "X" || downcase }}')
     end
     assert_raises(Liquid::SyntaxError) do
       Template.parse("{% include template %}", error_mode: :strict, include_options_blacklist: [:locale]).render!("template" => '{{ "X" || downcase }}')
     end
     with_error_mode(:lax) do
-      assert_equal('x', Template.parse("{% include template %}", error_mode: :strict, include_options_blacklist: [:error_mode]).render!("template" => '{{ "X" || downcase }}'))
+      assert_equal 'x', Template.parse("{% include template %}", error_mode: :strict, include_options_blacklist: [:error_mode]).render!("template" => '{{ "X" || downcase }}')
     end
   end
 

test/integration/tags/render_tag_test.rb

@@ -58,7 +58,7 @@ class RenderTagTest < Minitest::Test
   def test_recursively_rendered_template_does_not_produce_endless_loop
     Liquid::Template.file_system = StubFileSystem.new('loop' => '{% render "loop" %}')
 
-    assert_raises(Liquid::StackLevelError) do
+    assert_raises Liquid::StackLevelError do
       Template.parse('{% render "loop" %}').render!
     end
   end
@@ -67,7 +67,7 @@ class RenderTagTest < Minitest::Test
     Liquid::Template.file_system = StubFileSystem.new(
       'loop_render' => '{% render "loop_render" %}',
     )
-    assert_raises(Liquid::StackLevelError) do
+    assert_raises Liquid::StackLevelError do
       Template.parse('{% render "loop_render" %}').render!
     end
   end
@@ -75,7 +75,7 @@ class RenderTagTest < Minitest::Test
   def test_dynamically_choosen_templates_are_not_allowed
     Liquid::Template.file_system = StubFileSystem.new('snippet' => 'should not be rendered')
 
-    assert_raises(Liquid::SyntaxError) do
+    assert_raises Liquid::SyntaxError do
       Liquid::Template.parse("{% assign name = 'snippet' %}{% render name %}")
     end
   end
@@ -151,7 +151,7 @@ class RenderTagTest < Minitest::Test
     )
 
     assert_template_result("Product: Draft 151cm ",
-      "{% render 'product' with products[0] %}", "products" => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }])
+                           "{% render 'product' with products[0] %}", "products" => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }])
   end
 
   def test_render_tag_with_alias
@@ -161,7 +161,7 @@ class RenderTagTest < Minitest::Test
     )
 
     assert_template_result("Product: Draft 151cm ",
-      "{% render 'product_alias' with products[0] as product %}", "products" => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }])
+                           "{% render 'product_alias' with products[0] as product %}", "products" => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }])
   end
 
   def test_render_tag_for_alias
@@ -171,7 +171,7 @@ class RenderTagTest < Minitest::Test
     )
 
     assert_template_result("Product: Draft 151cm Product: Element 155cm ",
-      "{% render 'product_alias' for products as product %}", "products" => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }])
+                           "{% render 'product_alias' for products as product %}", "products" => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }])
   end
 
   def test_render_tag_for
@@ -181,7 +181,7 @@ class RenderTagTest < Minitest::Test
     )
 
     assert_template_result("Product: Draft 151cm Product: Element 155cm ",
-      "{% render 'product' for products %}", "products" => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }])
+                           "{% render 'product' for products %}", "products" => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }])
   end
 
   def test_render_tag_forloop
@@ -190,7 +190,7 @@ class RenderTagTest < Minitest::Test
     )
 
     assert_template_result("Product: Draft 151cm first  index:1 Product: Element 155cm  last index:2 ",
-      "{% render 'product' for products %}", "products" => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }])
+                           "{% render 'product' for products %}", "products" => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }])
   end
 
   def test_render_tag_for_drop
@@ -199,7 +199,7 @@ class RenderTagTest < Minitest::Test
     )
 
     assert_template_result("123",
-      "{% render 'loop' for loop as value %}", "loop" => TestEnumerable.new)
+                           "{% render 'loop' for loop as value %}", "loop" => TestEnumerable.new)
   end
 
   def test_render_tag_with_drop
@@ -208,6 +208,6 @@ class RenderTagTest < Minitest::Test
     )
 
     assert_template_result("TestEnumerable",
-      "{% render 'loop' with loop as value %}", "loop" => TestEnumerable.new)
+                           "{% render 'loop' with loop as value %}", "loop" => TestEnumerable.new)
   end
 end

test/integration/tags/standard_tag_test.rb

@@ -213,11 +213,6 @@ class StandardTagTest < Minitest::Test
     assert_template_result('', code, 'condition' => 'something else')
   end
 
-  def test_case_when_comma_and_blank_body
-    code = '{% case condition %}{% when 1, 2 %} {% assign r = "result" %} {% endcase %}{{ r }}'
-    assert_template_result('result', code, 'condition' => 2)
-  end
-
   def test_assign
     assert_template_result('variable', '{% assign a = "variable"%}{{a}}')
   end

test/integration/template_test.rb

@@ -135,6 +135,38 @@ class TemplateTest < Minitest::Test
     refute_nil(t.resource_limits.render_score)
   end
 
+  def test_resource_limits_assign_score
+    t = Template.parse("{% assign foo = 42 %}{% assign bar = 23 %}")
+    t.resource_limits.assign_score_limit = 1
+    assert_equal("Liquid error: Memory limits exceeded", t.render)
+    assert(t.resource_limits.reached?)
+
+    t.resource_limits.assign_score_limit = 2
+    assert_equal("", t.render!)
+    refute_nil(t.resource_limits.assign_score)
+  end
+
+  def test_resource_limits_assign_score_counts_bytes_not_characters
+    t = Template.parse("{% assign foo = 'すごい' %}")
+    t.render
+    assert_equal(9, t.resource_limits.assign_score)
+
+    t = Template.parse("{% capture foo %}すごい{% endcapture %}")
+    t.render
+    assert_equal(9, t.resource_limits.assign_score)
+  end
+
+  def test_resource_limits_assign_score_nested
+    t = Template.parse("{% assign foo = 'aaaa' | reverse %}")
+
+    t.resource_limits.assign_score_limit = 3
+    assert_equal("Liquid error: Memory limits exceeded", t.render)
+    assert(t.resource_limits.reached?)
+
+    t.resource_limits.assign_score_limit = 5
+    assert_equal("", t.render!)
+  end
+
   def test_resource_limits_aborts_rendering_after_first_error
     t = Template.parse("{% for a in (1..100) %} foo1 {% endfor %} bar {% for a in (1..100) %} foo2 {% endfor %}")
     t.resource_limits.render_score_limit = 50
@@ -198,7 +230,7 @@ class TemplateTest < Minitest::Test
     context = Context.new('drop' => ErroneousDrop.new)
     t = Template.new.parse('{{ drop.bad_method }}')
 
-    e = assert_raises(RuntimeError) do
+    e = assert_raises RuntimeError do
       t.render!(context)
     end
     assert_equal('ruby error in drop', e.message)
@@ -257,8 +289,9 @@ class TemplateTest < Minitest::Test
   end
 
   def test_nil_value_does_not_raise
-    t      = Template.parse("some{{x}}thing", error_mode: :strict)
-    result = t.render!({ 'x' => nil }, strict_variables: true)
+    Liquid::Template.error_mode = :strict
+    t                           = Template.parse("some{{x}}thing")
+    result                      = t.render!({ 'x' => nil }, strict_variables: true)
 
     assert_equal(0, t.errors.count)
     assert_equal('something', result)
@@ -267,7 +300,7 @@ class TemplateTest < Minitest::Test
   def test_undefined_variables_raise
     t = Template.parse("{{x}} {{y}} {{z.a}} {{z.b}} {{z.c.d}}")
 
-    assert_raises(UndefinedVariable) do
+    assert_raises UndefinedVariable do
       t.render!({ 'x' => 33, 'z' => { 'a' => 32, 'c' => { 'e' => 31 } } }, strict_variables: true)
     end
   end
@@ -286,7 +319,7 @@ class TemplateTest < Minitest::Test
     d = DropWithUndefinedMethod.new
     t = Template.new.parse('{{ foo }} {{ woot }}')
 
-    assert_raises(UndefinedDropMethod) do
+    assert_raises UndefinedDropMethod do
       t.render!(d, strict_variables: true)
     end
   end
@@ -309,7 +342,7 @@ class TemplateTest < Minitest::Test
   def test_undefined_filters_raise
     t = Template.parse("{{x | somefilter1 | upcase | somefilter2}}")
 
-    assert_raises(UndefinedFilter) do
+    assert_raises UndefinedFilter do
       t.render!({ 'x' => 'foo' }, strict_filters: true)
     end
   end
@@ -323,18 +356,4 @@ class TemplateTest < Minitest::Test
     result = t.render('x' => 1, 'y' => 5)
     assert_equal('12345', result)
   end
-
-  def test_source_string_subclass
-    string_subclass = Class.new(String) do
-      # E.g. ActiveSupport::SafeBuffer does this, so don't just rely on to_s to return a String
-      def to_s
-        self
-      end
-    end
-    source = string_subclass.new("{% assign x = 2 -%} x= {{- x }}")
-    assert_instance_of(string_subclass, source)
-    output = Template.parse(source).render!
-    assert_equal("x=2", output)
-    assert_instance_of(String, output)
-  end
 end

test/integration/trim_mode_test.rb

@@ -556,8 +556,4 @@ class TrimModeTest < Minitest::Test
     template = Liquid::Template.parse("B\n {%- if true %}{% endif %}", bug_compatible_whitespace_trimming: true)
     assert_equal("B", template.render)
   end
-
-  def test_trim_blank
-    assert_template_result('foobar', 'foo {{-}} bar')
-  end
 end # TrimModeTest

test/integration/variable_test.rb

@@ -15,44 +15,12 @@ class VariableTest < Minitest::Test
     assert_template_result('foobar', '{{ foo }}', 'foo' => ThingWithToLiquid.new)
   end
 
-  def test_variable_lookup_calls_to_liquid_value
-    assert_template_result('1', '{{ foo }}', 'foo' => IntegerDrop.new('1'))
-    assert_template_result('2', '{{ list[foo] }}', 'foo' => IntegerDrop.new('1'), 'list' => [1, 2, 3])
-    assert_template_result('one', '{{ list[foo] }}', 'foo' => IntegerDrop.new('1'), 'list' => { 1 => 'one' })
-    assert_template_result('Yay', '{{ foo }}', 'foo' => BooleanDrop.new(true))
-    assert_template_result('YAY', '{{ foo | upcase }}', 'foo' => BooleanDrop.new(true))
-  end
-
-  def test_if_tag_calls_to_liquid_value
-    assert_template_result('one', '{% if foo == 1 %}one{% endif %}', 'foo' => IntegerDrop.new('1'))
-    assert_template_result('one', '{% if 0 < foo %}one{% endif %}', 'foo' => IntegerDrop.new('1'))
-    assert_template_result('one', '{% if foo > 0 %}one{% endif %}', 'foo' => IntegerDrop.new('1'))
-    assert_template_result('true', '{% if foo == true %}true{% endif %}', 'foo' => BooleanDrop.new(true))
-    assert_template_result('true', '{% if foo %}true{% endif %}', 'foo' => BooleanDrop.new(true))
-
-    assert_template_result('', '{% if foo %}true{% endif %}', 'foo' => BooleanDrop.new(false))
-    assert_template_result('', '{% if foo == true %}True{% endif %}', 'foo' => BooleanDrop.new(false))
-  end
-
-  def test_unless_tag_calls_to_liquid_value
-    assert_template_result('', '{% unless foo %}true{% endunless %}', 'foo' => BooleanDrop.new(true))
-  end
-
-  def test_case_tag_calls_to_liquid_value
-    assert_template_result('One', '{% case foo %}{% when 1 %}One{% endcase %}', 'foo' => IntegerDrop.new('1'))
-  end
-
   def test_simple_with_whitespaces
     template = Template.parse(%(  {{ test }}  ))
     assert_equal('  worked  ', template.render!('test' => 'worked'))
     assert_equal('  worked wonderfully  ', template.render!('test' => 'worked wonderfully'))
   end
 
-  def test_expression_with_whitespace_in_square_brackets
-    assert_template_result('result', "{{ a[ 'b' ] }}", 'a' => { 'b' => 'result' })
-    assert_template_result('result', "{{ a[ [ 'b' ] ] }}", 'b' => 'c', 'a' => { 'c' => 'result' })
-  end
-
   def test_ignore_unknown
     template = Template.parse(%({{ test }}))
     assert_equal('', template.render!)
@@ -69,8 +37,8 @@ class VariableTest < Minitest::Test
   end
 
   def test_hash_scoping
-    assert_template_result('worked', "{{ test.test }}", 'test' => { 'test' => 'worked' })
-    assert_template_result('worked', "{{ test . test }}", 'test' => { 'test' => 'worked' })
+    template = Template.parse(%({{ test.test }}))
+    assert_equal('worked', template.render!('test' => { 'test' => 'worked' }))
   end
 
   def test_false_renders_as_false
@@ -127,12 +95,4 @@ class VariableTest < Minitest::Test
   def test_render_symbol
     assert_template_result('bar', '{{ foo }}', 'foo' => :bar)
   end
-
-  def test_dynamic_find_var
-    assert_template_result('bar', '{{ [key] }}', 'key' => 'foo', 'foo' => 'bar')
-  end
-
-  def test_raw_value_variable
-    assert_template_result('bar', '{{ [key] }}', 'key' => 'foo', 'foo' => 'bar')
-  end
 end

test/test_helper.rb

@@ -72,21 +72,21 @@ module Minitest
     end
 
     def with_global_filter(*globals)
-      original_global_cache = Liquid::StrainerFactory::GlobalCache
-      Liquid::StrainerFactory.send(:remove_const, :GlobalCache)
-      Liquid::StrainerFactory.const_set(:GlobalCache, Class.new(Liquid::StrainerTemplate))
+      original_global_filters = Liquid::StrainerFactory.instance_variable_get(:@global_filters)
+      Liquid::StrainerFactory.instance_variable_set(:@global_filters, [])
+      globals.each do |global|
+        Liquid::StrainerFactory.add_global_filter(global)
+      end
+
+      Liquid::StrainerFactory.send(:strainer_class_cache).clear
 
       globals.each do |global|
         Liquid::Template.register_filter(global)
       end
+      yield
+    ensure
       Liquid::StrainerFactory.send(:strainer_class_cache).clear
-      begin
-        yield
-      ensure
-        Liquid::StrainerFactory.send(:remove_const, :GlobalCache)
-        Liquid::StrainerFactory.const_set(:GlobalCache, original_global_cache)
-        Liquid::StrainerFactory.send(:strainer_class_cache).clear
-      end
+      Liquid::StrainerFactory.instance_variable_set(:@global_filters, original_global_filters)
     end
 
     def with_error_mode(mode)
@@ -119,44 +119,6 @@ class ThingWithToLiquid
   end
 end
 
-class IntegerDrop < Liquid::Drop
-  def initialize(value)
-    super()
-    @value = value.to_i
-  end
-
-  def ==(other)
-    @value == other
-  end
-
-  def to_s
-    @value.to_s
-  end
-
-  def to_liquid_value
-    @value
-  end
-end
-
-class BooleanDrop < Liquid::Drop
-  def initialize(value)
-    super()
-    @value = value
-  end
-
-  def ==(other)
-    @value == other
-  end
-
-  def to_liquid_value
-    @value
-  end
-
-  def to_s
-    @value ? "Yay" : "Nay"
-  end
-end
-
 class ErrorDrop < Liquid::Drop
   def standard_error
     raise Liquid::StandardError, 'standard error'

test/unit/condition_unit_test.rb

@@ -10,8 +10,8 @@ class ConditionUnitTest < Minitest::Test
   end
 
   def test_basic_condition
-    assert_equal(false, Condition.new(1, '==', 2).evaluate(Context.new))
-    assert_equal(true,  Condition.new(1, '==', 1).evaluate(Context.new))
+    assert_equal(false, Condition.new(1, '==', 2).evaluate)
+    assert_equal(true,  Condition.new(1, '==', 1).evaluate)
   end
 
   def test_default_operators_evalute_true
@@ -67,11 +67,11 @@ class ConditionUnitTest < Minitest::Test
   end
 
   def test_hash_compare_backwards_compatibility
-    assert_nil(Condition.new({}, '>', 2).evaluate(Context.new))
-    assert_nil(Condition.new(2, '>', {}).evaluate(Context.new))
-    assert_equal(false, Condition.new({}, '==', 2).evaluate(Context.new))
-    assert_equal(true, Condition.new({ 'a' => 1 }, '==', 'a' => 1).evaluate(Context.new))
-    assert_equal(true, Condition.new({ 'a' => 2 }, 'contains', 'a').evaluate(Context.new))
+    assert_nil(Condition.new({}, '>', 2).evaluate)
+    assert_nil(Condition.new(2, '>', {}).evaluate)
+    assert_equal(false, Condition.new({}, '==', 2).evaluate)
+    assert_equal(true, Condition.new({ 'a' => 1 }, '==', 'a' => 1).evaluate)
+    assert_equal(true, Condition.new({ 'a' => 2 }, 'contains', 'a').evaluate)
   end
 
   def test_contains_works_on_arrays
@@ -106,29 +106,30 @@ class ConditionUnitTest < Minitest::Test
 
   def test_or_condition
     condition = Condition.new(1, '==', 2)
-    assert_equal(false, condition.evaluate(Context.new))
+
+    assert_equal(false, condition.evaluate)
 
     condition.or(Condition.new(2, '==', 1))
 
-    assert_equal(false, condition.evaluate(Context.new))
+    assert_equal(false, condition.evaluate)
 
     condition.or(Condition.new(1, '==', 1))
 
-    assert_equal(true, condition.evaluate(Context.new))
+    assert_equal(true, condition.evaluate)
   end
 
   def test_and_condition
     condition = Condition.new(1, '==', 1)
 
-    assert_equal(true, condition.evaluate(Context.new))
+    assert_equal(true, condition.evaluate)
 
     condition.and(Condition.new(2, '==', 2))
 
-    assert_equal(true, condition.evaluate(Context.new))
+    assert_equal(true, condition.evaluate)
 
     condition.and(Condition.new(2, '==', 1))
 
-    assert_equal(false, condition.evaluate(Context.new))
+    assert_equal(false, condition.evaluate)
   end
 
   def test_should_allow_custom_proc_operator
@@ -147,20 +148,6 @@ class ConditionUnitTest < Minitest::Test
     assert_evaluates_true(VariableLookup.new("one"), '==', VariableLookup.new("another"))
   end
 
-  def test_default_context_is_deprecated
-    if Gem::Version.new(Liquid::VERSION) >= Gem::Version.new('6.0.0')
-      flunk("Condition#evaluate without a context argument is to be removed")
-    end
-
-    _out, err = capture_io do
-      assert_equal(true, Condition.new(1, '==', 1).evaluate)
-    end
-
-    expected = "DEPRECATION WARNING: Condition#evaluate without a context argument is deprecated" \
-      " and will be removed from Liquid 6.0.0."
-    assert_includes(err.lines.map(&:strip), expected)
-  end
-
   private
 
   def assert_evaluates_true(left, op, right)

test/unit/i18n_unit_test.rb

@@ -28,7 +28,7 @@ class I18nUnitTest < Minitest::Test
   # end
 
   def test_raises_unknown_translation
-    assert_raises(I18n::TranslationError) do
+    assert_raises I18n::TranslationError do
       @i18n.translate("doesnt_exist")
     end
   end

test/unit/optimizer_test.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+require 'test_helper'
+
+class OptimizerUnitTest < Minitest::Test
+  include Liquid
+
+  def test_combines_append_filters
+    optimizer = Optimizer.new
+    var = Variable.new('hello | append: "a" | append: b', ParseContext.new)
+    var = optimizer.optimize(var)
+    assert_equal([
+      ['append_all', ["a", VariableLookup.new("b")]]
+    ], var.filters)
+  end
+end

test/unit/parse_tree_visitor_test.rb

@@ -26,13 +26,6 @@ class ParseTreeVisitorTest < Minitest::Test
     )
   end
 
-  def test_echo
-    assert_equal(
-      ["test"],
-      visit(%({% echo test %}))
-    )
-  end
-
   def test_if_condition
     assert_equal(
       ["test"],
@@ -159,13 +152,6 @@ class ParseTreeVisitorTest < Minitest::Test
     )
   end
 
-  def test_for_range
-    assert_equal(
-      ["test"],
-      visit(%({% for x in (1..test) %}{% endfor %}))
-    )
-  end
-
   def test_tablerow_in
     assert_equal(
       ["test"],

test/unit/strainer_factory_unit_test.rb

@@ -52,8 +52,7 @@ class StrainerFactoryUnitTest < Minitest::Test
       /\ALiquid error: wrong number of arguments \((1 for 0|given 1, expected 0)\)\z/,
       exception.message
     )
-    source = AccessScopeFilters.instance_method(:public_filter).source_location
-    assert_equal(source.map(&:to_s), exception.backtrace[0].split(':')[0..1])
+    assert_equal(exception.backtrace[0].split(':')[0], __FILE__)
   end
 
   def test_strainer_only_invokes_public_filter_methods

test/unit/strainer_template_unit_test.rb

@@ -57,8 +57,8 @@ class StrainerTemplateUnitTest < Minitest::Test
   end
 
   def test_add_filter_does_not_raise_when_module_overrides_previously_registered_method
+    strainer = Context.new.strainer
     with_global_filter do
-      strainer = Context.new.strainer
       strainer.class.add_filter(PublicMethodOverrideFilter)
       assert(strainer.class.send(:filter_methods).include?('public_filter'))
     end

test/unit/tokenizer_unit_test.rb

@@ -32,26 +32,21 @@ class TokenizerTest < Minitest::Test
 
   private
 
-  def new_tokenizer(source, parse_context: Liquid::ParseContext.new, start_line_number: nil)
-    parse_context.new_tokenizer(source, start_line_number: start_line_number)
-  end
-
   def tokenize(source)
-    tokenizer = new_tokenizer(source)
+    tokenizer = Liquid::Tokenizer.new(source)
     tokens    = []
-    # shift is private in Liquid::C::Tokenizer, since it is only for unit testing
-    while (t = tokenizer.send(:shift))
+    while (t = tokenizer.shift)
       tokens << t
     end
     tokens
   end
 
   def tokenize_line_numbers(source)
-    tokenizer    = new_tokenizer(source, start_line_number: 1)
+    tokenizer    = Liquid::Tokenizer.new(source, true)
     line_numbers = []
     loop do
       line_number = tokenizer.line_number
-      if tokenizer.send(:shift)
+      if tokenizer.shift
         line_numbers << line_number
       else
         break

test/unit/variable_unit_test.rb

@@ -108,7 +108,7 @@ class VariableUnitTest < Minitest::Test
     assert_equal(VariableLookup.new('foo-bar'), create_variable('foo-bar').name)
     assert_equal(VariableLookup.new('foo-bar-2'), create_variable('foo-bar-2').name)
 
-    with_error_mode(:strict) do
+    with_error_mode :strict do
       assert_raises(Liquid::SyntaxError) { create_variable('foo - bar') }
       assert_raises(Liquid::SyntaxError) { create_variable('-foo') }
       assert_raises(Liquid::SyntaxError) { create_variable('2foo') }