Seperate unit and integration tests.

This makes it easier to re-use the integration tests in a seperate gem that
optimizes parts of liquid with a native implementation.

test/integration/assign_test.rb

@@ -0,0 +1,27 @@
+require 'test_helper'
+
+class AssignTest < Test::Unit::TestCase
+  include Liquid
+
+  def test_assigned_variable
+    assert_template_result('.foo.',
+                           '{% assign foo = values %}.{{ foo[0] }}.',
+                           'values' => %w{foo bar baz})
+
+    assert_template_result('.bar.',
+                           '{% assign foo = values %}.{{ foo[1] }}.',
+                           'values' => %w{foo bar baz})
+  end
+
+  def test_assign_with_filter
+    assert_template_result('.bar.',
+                           '{% assign foo = values | split: "," %}.{{ foo[1] }}.',
+                           'values' => "foo,bar,baz")
+  end
+
+  def test_assign_syntax_error
+    assert_match_syntax_error(/assign/,
+                       '{% assign foo not values %}.',
+                       'values' => "foo,bar,baz")
+  end
+end # AssignTest

test/integration/blank_test.rb

@@ -0,0 +1,106 @@
+require 'test_helper'
+
+class FoobarTag < Liquid::Tag
+  def render(*args)
+    " "
+  end
+
+  Liquid::Template.register_tag('foobar', FoobarTag)
+end
+
+class BlankTestFileSystem
+  def read_template_file(template_path, context)
+    template_path
+  end
+end
+
+class BlankTest < Test::Unit::TestCase
+  include Liquid
+  N = 10
+
+  def wrap_in_for(body)
+    "{% for i in (1..#{N}) %}#{body}{% endfor %}"
+  end
+
+  def wrap_in_if(body)
+    "{% if true %}#{body}{% endif %}"
+  end
+
+  def wrap(body)
+    wrap_in_for(body) + wrap_in_if(body)
+  end
+
+  def test_new_tags_are_not_blank_by_default
+    assert_template_result(" "*N, wrap_in_for("{% foobar %}"))
+  end
+
+  def test_loops_are_blank
+    assert_template_result("", wrap_in_for(" "))
+  end
+
+  def test_if_else_are_blank
+    assert_template_result("", "{% if true %} {% elsif false %} {% else %} {% endif %}")
+  end
+
+  def test_unless_is_blank
+    assert_template_result("", wrap("{% unless true %} {% endunless %}"))
+  end
+
+  def test_mark_as_blank_only_during_parsing
+    assert_template_result(" "*(N+1), wrap(" {% if false %} this never happens, but still, this block is not blank {% endif %}"))
+  end
+
+  def test_comments_are_blank
+    assert_template_result("", wrap(" {% comment %} whatever {% endcomment %} "))
+  end
+
+  def test_captures_are_blank
+    assert_template_result("", wrap(" {% capture foo %} whatever {% endcapture %} "))
+  end
+
+  def test_nested_blocks_are_blank_but_only_if_all_children_are
+    assert_template_result("", wrap(wrap(" ")))
+    assert_template_result("\n       but this is not "*(N+1),
+      wrap(%q{{% if true %} {% comment %} this is blank {% endcomment %} {% endif %}
+      {% if true %} but this is not {% endif %}}))
+  end
+
+  def test_assigns_are_blank
+    assert_template_result("", wrap(' {% assign foo = "bar" %} '))
+  end
+
+  def test_whitespace_is_blank
+    assert_template_result("", wrap(" "))
+    assert_template_result("", wrap("\t"))
+  end
+
+  def test_whitespace_is_not_blank_if_other_stuff_is_present
+    body = "     x "
+    assert_template_result(body*(N+1), wrap(body))
+  end
+
+  def test_increment_is_not_blank
+    assert_template_result(" 0"*2*(N+1), wrap("{% assign foo = 0 %} {% increment foo %} {% decrement foo %}"))
+  end
+
+  def test_cycle_is_not_blank
+    assert_template_result("  "*((N+1)/2)+" ", wrap("{% cycle ' ', ' ' %}"))
+  end
+
+  def test_raw_is_not_blank
+    assert_template_result("  "*(N+1), wrap(" {% raw %} {% endraw %}"))
+  end
+
+  def test_include_is_blank
+    Liquid::Template.file_system = BlankTestFileSystem.new
+    assert_template_result "foobar"*(N+1), wrap("{% include 'foobar' %}")
+    assert_template_result " foobar "*(N+1), wrap("{% include ' foobar ' %}")
+    assert_template_result "   "*(N+1), wrap(" {% include ' ' %} ")
+  end
+
+  def test_case_is_blank
+    assert_template_result("", wrap(" {% assign foo = 'bar' %} {% case foo %} {% when 'bar' %} {% when 'whatever' %} {% else %} {% endcase %} "))
+    assert_template_result("", wrap(" {% assign foo = 'else' %} {% case foo %} {% when 'bar' %} {% when 'whatever' %} {% else %} {% endcase %} "))
+    assert_template_result("   x  "*(N+1), wrap(" {% assign foo = 'else' %} {% case foo %} {% when 'bar' %} {% when 'whatever' %} {% else %} x {% endcase %} "))
+  end
+end

test/integration/capture_test.rb

@@ -0,0 +1,40 @@
+require 'test_helper'
+
+class CaptureTest < Test::Unit::TestCase
+  include Liquid
+
+  def test_captures_block_content_in_variable
+    assert_template_result("test string", "{% capture 'var' %}test string{% endcapture %}{{var}}", {})
+  end
+
+  def test_capture_to_variable_from_outer_scope_if_existing
+    template_source = <<-END_TEMPLATE
+    {% assign var = '' %}
+    {% if true %}
+    {% capture var %}first-block-string{% endcapture %}
+    {% endif %}
+    {% if true %}
+    {% capture var %}test-string{% endcapture %}
+    {% endif %}
+    {{var}}
+    END_TEMPLATE
+    template = Template.parse(template_source)
+    rendered = template.render!
+    assert_equal "test-string", rendered.gsub(/\s/, '')
+  end
+
+  def test_assigning_from_capture
+    template_source = <<-END_TEMPLATE
+    {% assign first = '' %}
+    {% assign second = '' %}
+    {% for number in (1..3) %}
+    {% capture first %}{{number}}{% endcapture %}
+    {% assign second = first %}
+    {% endfor %}
+    {{ first }}-{{ second }}
+    END_TEMPLATE
+    template = Template.parse(template_source)
+    rendered = template.render!
+    assert_equal "3-3", rendered.gsub(/\s/, '')
+  end
+end # CaptureTest

test/integration/context_test.rb

@@ -0,0 +1,24 @@
+require 'test_helper'
+
+class ContextTest < Test::Unit::TestCase
+  include Liquid
+
+  def test_override_global_filter
+    global = Module.new do
+      def notice(output)
+        "Global #{output}"
+      end
+    end
+
+    local = Module.new do
+      def notice(output)
+        "Local #{output}"
+      end
+    end
+
+    Template.register_filter(global)
+    assert_equal 'Global test', Template.parse("{{'test' | notice }}").render!
+    assert_equal 'Local test', Template.parse("{{'test' | notice }}").render!({}, :filters => [local])
+  end
+
+end

test/integration/drop_test.rb

@@ -0,0 +1,245 @@
+require 'test_helper'
+
+class ContextDrop < Liquid::Drop
+  def scopes
+    @context.scopes.size
+  end
+
+  def scopes_as_array
+    (1..@context.scopes.size).to_a
+  end
+
+  def loop_pos
+    @context['forloop.index']
+  end
+
+  def before_method(method)
+    return @context[method]
+  end
+end
+
+class ProductDrop < Liquid::Drop
+
+  class TextDrop < Liquid::Drop
+    def array
+      ['text1', 'text2']
+    end
+
+    def text
+      'text1'
+    end
+  end
+
+  class CatchallDrop < Liquid::Drop
+    def before_method(method)
+      return 'method: ' << method.to_s
+    end
+  end
+
+  def texts
+    TextDrop.new
+  end
+
+  def catchall
+    CatchallDrop.new
+  end
+
+  def context
+    ContextDrop.new
+  end
+
+  protected
+    def callmenot
+      "protected"
+    end
+end
+
+class EnumerableDrop < Liquid::Drop
+  def before_method(method)
+    method
+  end
+
+  def size
+    3
+  end
+
+  def first
+    1
+  end
+
+  def count
+    3
+  end
+
+  def min
+    1
+  end
+
+  def max
+    3
+  end
+
+  def each
+    yield 1
+    yield 2
+    yield 3
+  end
+end
+
+class RealEnumerableDrop < Liquid::Drop
+  include Enumerable
+
+  def before_method(method)
+    method
+  end
+
+  def each
+    yield 1
+    yield 2
+    yield 3
+  end
+end
+
+class DropsTest < Test::Unit::TestCase
+  include Liquid
+
+  def test_product_drop
+    assert_nothing_raised do
+      tpl = Liquid::Template.parse( '  '  )
+      tpl.render!('product' => ProductDrop.new)
+    end
+  end
+
+  def test_drop_does_only_respond_to_whitelisted_methods
+    assert_equal "", Liquid::Template.parse("{{ product.inspect }}").render!('product' => ProductDrop.new)
+    assert_equal "", Liquid::Template.parse("{{ product.pretty_inspect }}").render!('product' => ProductDrop.new)
+    assert_equal "", Liquid::Template.parse("{{ product.whatever }}").render!('product' => ProductDrop.new)
+    assert_equal "", Liquid::Template.parse('{{ product | map: "inspect" }}').render!('product' => ProductDrop.new)
+    assert_equal "", Liquid::Template.parse('{{ product | map: "pretty_inspect" }}').render!('product' => ProductDrop.new)
+    assert_equal "", Liquid::Template.parse('{{ product | map: "whatever" }}').render!('product' => ProductDrop.new)
+  end
+
+  def test_drops_respond_to_to_liquid
+    assert_equal "text1", Liquid::Template.parse("{{ product.to_liquid.texts.text }}").render!('product' => ProductDrop.new)
+    assert_equal "text1", Liquid::Template.parse('{{ product | map: "to_liquid" | map: "texts" | map: "text" }}').render!('product' => ProductDrop.new)
+  end
+
+  def test_text_drop
+    output = Liquid::Template.parse( ' {{ product.texts.text }} '  ).render!('product' => ProductDrop.new)
+    assert_equal ' text1 ', output
+  end
+
+  def test_unknown_method
+    output = Liquid::Template.parse( ' {{ product.catchall.unknown }} '  ).render!('product' => ProductDrop.new)
+    assert_equal ' method: unknown ', output
+  end
+
+  def test_integer_argument_drop
+    output = Liquid::Template.parse( ' {{ product.catchall[8] }} '  ).render!('product' => ProductDrop.new)
+    assert_equal ' method: 8 ', output
+  end
+
+  def test_text_array_drop
+    output = Liquid::Template.parse( '{% for text in product.texts.array %} {{text}} {% endfor %}'  ).render!('product' => ProductDrop.new)
+    assert_equal ' text1  text2 ', output
+  end
+
+  def test_context_drop
+    output = Liquid::Template.parse( ' {{ context.bar }} '  ).render!('context' => ContextDrop.new, 'bar' => "carrot")
+    assert_equal ' carrot ', output
+  end
+
+  def test_nested_context_drop
+    output = Liquid::Template.parse( ' {{ product.context.foo }} '  ).render!('product' => ProductDrop.new, 'foo' => "monkey")
+    assert_equal ' monkey ', output
+  end
+
+  def test_protected
+    output = Liquid::Template.parse( ' {{ product.callmenot }} '  ).render!('product' => ProductDrop.new)
+    assert_equal '  ', output
+  end
+
+  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
+    end
+  end
+
+  def test_scope
+    assert_equal '1', Liquid::Template.parse( '{{ context.scopes }}'  ).render!('context' => ContextDrop.new)
+    assert_equal '2', Liquid::Template.parse( '{%for i in dummy%}{{ context.scopes }}{%endfor%}'  ).render!('context' => ContextDrop.new, 'dummy' => [1])
+    assert_equal '3', Liquid::Template.parse( '{%for i in dummy%}{%for i in dummy%}{{ context.scopes }}{%endfor%}{%endfor%}'  ).render!('context' => ContextDrop.new, 'dummy' => [1])
+  end
+
+  def test_scope_though_proc
+    assert_equal '1', Liquid::Template.parse( '{{ s }}'  ).render!('context' => ContextDrop.new, 's' => Proc.new{|c| c['context.scopes'] })
+    assert_equal '2', Liquid::Template.parse( '{%for i in dummy%}{{ s }}{%endfor%}'  ).render!('context' => ContextDrop.new, 's' => Proc.new{|c| c['context.scopes'] }, 'dummy' => [1])
+    assert_equal '3', Liquid::Template.parse( '{%for i in dummy%}{%for i in dummy%}{{ s }}{%endfor%}{%endfor%}'  ).render!('context' => ContextDrop.new, 's' => Proc.new{|c| c['context.scopes'] }, 'dummy' => [1])
+  end
+
+  def test_scope_with_assigns
+    assert_equal 'variable', Liquid::Template.parse( '{% assign a = "variable"%}{{a}}'  ).render!('context' => ContextDrop.new)
+    assert_equal 'variable', Liquid::Template.parse( '{% assign a = "variable"%}{%for i in dummy%}{{a}}{%endfor%}'  ).render!('context' => ContextDrop.new, 'dummy' => [1])
+    assert_equal 'test', Liquid::Template.parse( '{% assign header_gif = "test"%}{{header_gif}}'  ).render!('context' => ContextDrop.new)
+    assert_equal 'test', Liquid::Template.parse( "{% assign header_gif = 'test'%}{{header_gif}}"  ).render!('context' => ContextDrop.new)
+  end
+
+  def test_scope_from_tags
+    assert_equal '1', Liquid::Template.parse( '{% for i in context.scopes_as_array %}{{i}}{% endfor %}'  ).render!('context' => ContextDrop.new, 'dummy' => [1])
+    assert_equal '12', Liquid::Template.parse( '{%for a in dummy%}{% for i in context.scopes_as_array %}{{i}}{% endfor %}{% endfor %}'  ).render!('context' => ContextDrop.new, 'dummy' => [1])
+    assert_equal '123', Liquid::Template.parse( '{%for a in dummy%}{%for a in dummy%}{% for i in context.scopes_as_array %}{{i}}{% endfor %}{% endfor %}{% endfor %}'  ).render!('context' => ContextDrop.new, 'dummy' => [1])
+  end
+
+  def test_access_context_from_drop
+    assert_equal '123', Liquid::Template.parse( '{%for a in dummy%}{{ context.loop_pos }}{% endfor %}'  ).render!('context' => ContextDrop.new, 'dummy' => [1,2,3])
+  end
+
+  def test_enumerable_drop
+    assert_equal '123', Liquid::Template.parse( '{% for c in collection %}{{c}}{% endfor %}').render!('collection' => EnumerableDrop.new)
+  end
+
+  def test_enumerable_drop_size
+    assert_equal '3', Liquid::Template.parse( '{{collection.size}}').render!('collection' => EnumerableDrop.new)
+  end
+
+  def test_enumerable_drop_will_invoke_before_method_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)
+    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)
+    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)
+    end
+  end
+
+  def test_empty_string_value_access
+    assert_equal '', Liquid::Template.parse('{{ product[value] }}').render!('product' => ProductDrop.new, 'value' => '')
+  end
+
+  def test_nil_value_access
+    assert_equal '', Liquid::Template.parse('{{ product[value] }}').render!('product' => ProductDrop.new, 'value' => nil)
+  end
+
+  def test_default_to_s_on_drops
+    assert_equal 'ProductDrop', Liquid::Template.parse("{{ product }}").render!('product' => ProductDrop.new)
+    assert_equal 'EnumerableDrop', Liquid::Template.parse('{{ collection }}').render!('collection' => EnumerableDrop.new)
+  end
+end # DropsTest

test/integration/error_handling_test.rb

@@ -0,0 +1,110 @@
+require 'test_helper'
+
+class ErrorDrop < Liquid::Drop
+  def standard_error
+    raise Liquid::StandardError, 'standard error'
+  end
+
+  def argument_error
+    raise Liquid::ArgumentError, 'argument error'
+  end
+
+  def syntax_error
+    raise Liquid::SyntaxError, 'syntax error'
+  end
+
+  def exception
+    raise Exception, 'exception'
+  end
+
+end
+
+class ErrorHandlingTest < Test::Unit::TestCase
+  include Liquid
+
+  def test_standard_error
+    assert_nothing_raised do
+      template = Liquid::Template.parse( ' {{ errors.standard_error }} '  )
+      assert_equal ' Liquid error: standard error ', template.render('errors' => ErrorDrop.new)
+
+      assert_equal 1, template.errors.size
+      assert_equal StandardError, template.errors.first.class
+    end
+  end
+
+  def test_syntax
+
+    assert_nothing_raised do
+
+      template = Liquid::Template.parse( ' {{ errors.syntax_error }} '  )
+      assert_equal ' Liquid syntax error: syntax error ', template.render('errors' => ErrorDrop.new)
+
+      assert_equal 1, template.errors.size
+      assert_equal SyntaxError, template.errors.first.class
+
+    end
+  end
+
+  def test_argument
+    assert_nothing_raised do
+
+      template = Liquid::Template.parse( ' {{ errors.argument_error }} '  )
+      assert_equal ' Liquid error: argument error ', template.render('errors' => ErrorDrop.new)
+
+      assert_equal 1, template.errors.size
+      assert_equal ArgumentError, template.errors.first.class
+    end
+  end
+
+  def test_missing_endtag_parse_time_error
+    assert_raise(Liquid::SyntaxError) do
+      Liquid::Template.parse(' {% for a in b %} ... ')
+    end
+  end
+
+  def test_unrecognized_operator
+    with_error_mode(:strict) do
+      assert_raise(SyntaxError) do
+        Liquid::Template.parse(' {% if 1 =! 2 %}ok{% endif %} ')
+      end
+    end
+  end
+  
+  def test_lax_unrecognized_operator
+    assert_nothing_raised do
+      template = Liquid::Template.parse(' {% if 1 =! 2 %}ok{% endif %} ', :error_mode => :lax)
+      assert_equal ' Liquid error: Unknown operator =! ', template.render
+      assert_equal 1, template.errors.size
+      assert_equal Liquid::ArgumentError, template.errors.first.class
+    end
+  end
+
+  def test_strict_error_messages
+    err = assert_raise(SyntaxError) do
+      Liquid::Template.parse(' {% if 1 =! 2 %}ok{% endif %} ', :error_mode => :strict)
+    end
+    assert_equal 'Unexpected character = in "1 =! 2"', err.message
+
+    err = assert_raise(SyntaxError) do
+      Liquid::Template.parse('{{%%%}}', :error_mode => :strict)
+    end
+    assert_equal 'Unexpected character % in "{{%%%}}"', err.message
+  end
+
+  def test_warnings
+    template = Liquid::Template.parse('{% if ~~~ %}{{%%%}}{% else %}{{ hello. }}{% endif %}', :error_mode => :warn)
+    assert_equal 3, template.warnings.size
+    assert_equal 'Unexpected character ~ in "~~~"', template.warnings[0].message
+    assert_equal 'Unexpected character % in "{{%%%}}"', template.warnings[1].message
+    assert_equal 'Expected id but found end_of_string in "{{ hello. }}"', template.warnings[2].message
+    assert_equal '', template.render
+  end
+
+  # Liquid should not catch Exceptions that are not subclasses of StandardError, like Interrupt and NoMemoryError
+  def test_exceptions_propagate
+    assert_raise Exception do
+      template = Liquid::Template.parse( ' {{ errors.exception }} '  )
+      template.render('errors' => ErrorDrop.new)
+    end
+  end
+end # ErrorHandlingTest

test/integration/filter_test.rb

@@ -0,0 +1,125 @@
+require 'test_helper'
+
+module MoneyFilter
+  def money(input)
+    sprintf(' %d$ ', input)
+  end
+
+  def money_with_underscore(input)
+    sprintf(' %d$ ', input)
+  end
+end
+
+module CanadianMoneyFilter
+  def money(input)
+    sprintf(' %d$ CAD ', input)
+  end
+end
+
+module SubstituteFilter
+  def substitute(input, params={})
+    input.gsub(/%\{(\w+)\}/) { |match| params[$1] }
+  end
+end
+
+class FiltersTest < Test::Unit::TestCase
+  include Liquid
+
+  def setup
+    @context = Context.new
+  end
+
+  def test_local_filter
+    @context['var'] = 1000
+    @context.add_filters(MoneyFilter)
+
+    assert_equal ' 1000$ ', Variable.new("var | money").render(@context)
+  end
+
+  def test_underscore_in_filter_name
+    @context['var'] = 1000
+    @context.add_filters(MoneyFilter)
+    assert_equal ' 1000$ ', Variable.new("var | money_with_underscore").render(@context)
+  end
+
+  def test_second_filter_overwrites_first
+    @context['var'] = 1000
+    @context.add_filters(MoneyFilter)
+    @context.add_filters(CanadianMoneyFilter)
+
+    assert_equal ' 1000$ CAD ', Variable.new("var | money").render(@context)
+  end
+
+  def test_size
+    @context['var'] = 'abcd'
+    @context.add_filters(MoneyFilter)
+
+    assert_equal 4, Variable.new("var | size").render(@context)
+  end
+
+  def test_join
+    @context['var'] = [1,2,3,4]
+
+    assert_equal "1 2 3 4", Variable.new("var | join").render(@context)
+  end
+
+  def test_sort
+    @context['value'] = 3
+    @context['numbers'] = [2,1,4,3]
+    @context['words'] = ['expected', 'as', 'alphabetic']
+    @context['arrays'] = [['flattened'], ['are']]
+
+    assert_equal [1,2,3,4], Variable.new("numbers | sort").render(@context)
+    assert_equal ['alphabetic', 'as', 'expected'], Variable.new("words | sort").render(@context)
+    assert_equal [3], Variable.new("value | sort").render(@context)
+    assert_equal ['are', 'flattened'], Variable.new("arrays | sort").render(@context)
+  end
+
+  def test_strip_html
+    @context['var'] = "<b>bla blub</a>"
+
+    assert_equal "bla blub", Variable.new("var | strip_html").render(@context)
+  end
+
+  def test_strip_html_ignore_comments_with_html
+    @context['var'] = "<!-- split and some <ul> tag --><b>bla blub</a>"
+
+    assert_equal "bla blub", Variable.new("var | strip_html").render(@context)
+  end
+
+  def test_capitalize
+    @context['var'] = "blub"
+
+    assert_equal "Blub", Variable.new("var | capitalize").render(@context)
+  end
+
+  def test_nonexistent_filter_is_ignored
+    @context['var'] = 1000
+
+    assert_equal 1000, Variable.new("var | xyzzy").render(@context)
+  end
+
+  def test_filter_with_keyword_arguments
+    @context['surname'] = 'john'
+    @context.add_filters(SubstituteFilter)
+    output = Variable.new(%! 'hello %{first_name}, %{last_name}' | substitute: first_name: surname, last_name: 'doe' !).render(@context)
+    assert_equal 'hello john, doe', output
+  end
+end
+
+class FiltersInTemplate < Test::Unit::TestCase
+  include Liquid
+
+  def test_local_global
+    Template.register_filter(MoneyFilter)
+
+    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
+
+  def test_local_filter_with_deprecated_syntax
+    assert_equal " 1000$ CAD ", Template.parse("{{1000 | money}}").render!(nil, CanadianMoneyFilter)
+    assert_equal " 1000$ CAD ", Template.parse("{{1000 | money}}").render!(nil, [CanadianMoneyFilter])
+  end
+end # FiltersTest

test/integration/hash_ordering_test.rb

@@ -0,0 +1,25 @@
+require 'test_helper'
+
+module MoneyFilter
+  def money(input)
+    sprintf(' %d$ ', input)
+  end
+end
+
+module CanadianMoneyFilter
+  def money(input)
+    sprintf(' %d$ CAD ', input)
+  end
+end
+
+class HashOrderingTest < Test::Unit::TestCase
+  include Liquid
+
+ def test_global_register_order
+    Template.register_filter(MoneyFilter)
+    Template.register_filter(CanadianMoneyFilter)
+
+    assert_equal " 1000$ CAD ", Template.parse("{{1000 | money}}").render(nil, nil)
+ end
+
+end

test/integration/output_test.rb

@@ -0,0 +1,116 @@
+require 'test_helper'
+
+module FunnyFilter
+  def make_funny(input)
+    'LOL'
+  end
+
+  def cite_funny(input)
+    "LOL: #{input}"
+  end
+
+  def add_smiley(input, smiley = ":-)")
+    "#{input} #{smiley}"
+  end
+
+  def add_tag(input, tag = "p", id = "foo")
+    %|<#{tag} id="#{id}">#{input}</#{tag}>|
+  end
+
+  def paragraph(input)
+    "<p>#{input}</p>"
+  end
+
+  def link_to(name, url)
+    %|<a href="#{url}">#{name}</a>|
+  end
+
+end
+
+class OutputTest < Test::Unit::TestCase
+  include Liquid
+
+  def setup
+    @assigns = {
+      'best_cars' => 'bmw',
+      'car' => {'bmw' => 'good', 'gm' => 'bad'}
+      }
+  end
+
+  def test_variable
+    text = %| {{best_cars}} |
+
+    expected = %| bmw |
+    assert_equal expected, Template.parse(text).render!(@assigns)
+  end
+
+  def test_variable_traversing
+    text = %| {{car.bmw}} {{car.gm}} {{car.bmw}} |
+
+    expected = %| good bad good |
+    assert_equal expected, Template.parse(text).render!(@assigns)
+  end
+
+  def test_variable_piping
+    text = %( {{ car.gm | make_funny }} )
+    expected = %| LOL |
+
+    assert_equal expected, Template.parse(text).render!(@assigns, :filters => [FunnyFilter])
+  end
+
+  def test_variable_piping_with_input
+    text = %( {{ car.gm | cite_funny }} )
+    expected = %| LOL: bad |
+
+    assert_equal expected, Template.parse(text).render!(@assigns, :filters => [FunnyFilter])
+  end
+
+  def test_variable_piping_with_args
+    text = %! {{ car.gm | add_smiley : ':-(' }} !
+    expected = %| bad :-( |
+
+    assert_equal expected, Template.parse(text).render!(@assigns, :filters => [FunnyFilter])
+  end
+
+  def test_variable_piping_with_no_args
+    text = %! {{ car.gm | add_smiley }} !
+    expected = %| bad :-) |
+
+    assert_equal expected, Template.parse(text).render!(@assigns, :filters => [FunnyFilter])
+  end
+
+  def test_multiple_variable_piping_with_args
+    text = %! {{ car.gm | add_smiley : ':-(' | add_smiley : ':-('}} !
+    expected = %| bad :-( :-( |
+
+    assert_equal expected, Template.parse(text).render!(@assigns, :filters => [FunnyFilter])
+  end
+
+  def test_variable_piping_with_multiple_args
+    text = %! {{ car.gm | add_tag : 'span', 'bar'}} !
+    expected = %| <span id="bar">bad</span> |
+
+    assert_equal expected, Template.parse(text).render!(@assigns, :filters => [FunnyFilter])
+  end
+
+  def test_variable_piping_with_variable_args
+    text = %! {{ car.gm | add_tag : 'span', car.bmw}} !
+    expected = %| <span id="good">bad</span> |
+
+    assert_equal expected, Template.parse(text).render!(@assigns, :filters => [FunnyFilter])
+  end
+
+  def test_multiple_pipings
+    text = %( {{ best_cars | cite_funny | paragraph }} )
+    expected = %| <p>LOL: bmw</p> |
+
+    assert_equal expected, Template.parse(text).render!(@assigns, :filters => [FunnyFilter])
+  end
+
+  def test_link_to
+    text = %( {{ 'Typo' | link_to: 'http://typo.leetsoft.com' }} )
+    expected = %| <a href="http://typo.leetsoft.com">Typo</a> |
+
+    assert_equal expected, Template.parse(text).render!(@assigns, :filters => [FunnyFilter])
+  end
+end # OutputTest

test/integration/parsing_quirks_test.rb

@@ -0,0 +1,87 @@
+require 'test_helper'
+
+class ParsingQuirksTest < Test::Unit::TestCase
+  include Liquid
+
+  def test_parsing_css
+    text = " div { font-weight: bold; } "
+    assert_equal text, Template.parse(text).render!
+  end
+
+  def test_raise_on_single_close_bracet
+    assert_raise(SyntaxError) do
+      Template.parse("text {{method} oh nos!")
+    end
+  end
+
+  def test_raise_on_label_and_no_close_bracets
+    assert_raise(SyntaxError) do
+      Template.parse("TEST {{ ")
+    end
+  end
+
+  def test_raise_on_label_and_no_close_bracets_percent
+    assert_raise(SyntaxError) do
+      Template.parse("TEST {% ")
+    end
+  end
+
+  def test_error_on_empty_filter
+    assert_nothing_raised do
+      Template.parse("{{test}}")
+      Template.parse("{{|test}}")
+    end
+    with_error_mode(:strict) do
+      assert_raise(SyntaxError) do
+        Template.parse("{{test |a|b|}}")
+      end
+    end
+  end
+
+  def test_meaningless_parens_error
+    with_error_mode(:strict) do
+      assert_raise(SyntaxError) do
+        markup = "a == 'foo' or (b == 'bar' and c == 'baz') or false"
+        Template.parse("{% if #{markup} %} YES {% endif %}")
+      end
+    end
+  end
+
+  def test_unexpected_characters_syntax_error
+    with_error_mode(:strict) do
+      assert_raise(SyntaxError) do
+        markup = "true && false"
+        Template.parse("{% if #{markup} %} YES {% endif %}")
+      end
+      assert_raise(SyntaxError) do
+        markup = "false || true"
+        Template.parse("{% if #{markup} %} YES {% endif %}")
+      end
+    end
+  end
+
+  def test_no_error_on_lax_empty_filter
+    assert_nothing_raised do
+      Template.parse("{{test |a|b|}}", :error_mode => :lax)
+      Template.parse("{{test}}", :error_mode => :lax)
+      Template.parse("{{|test|}}", :error_mode => :lax)
+    end
+  end
+
+  def test_meaningless_parens_lax
+    with_error_mode(:lax) do
+      assigns = {'b' => 'bar', 'c' => 'baz'}
+      markup = "a == 'foo' or (b == 'bar' and c == 'baz') or false"
+      assert_template_result(' YES ',"{% if #{markup} %} YES {% endif %}", assigns)
+    end
+  end
+
+  def test_unexpected_characters_silently_eat_logic_lax
+    with_error_mode(:lax) do
+      markup = "true && false"
+      assert_template_result(' YES ',"{% if #{markup} %} YES {% endif %}")
+      markup = "false || true"
+      assert_template_result('',"{% if #{markup} %} YES {% endif %}")
+    end
+  end
+end # ParsingQuirksTest

test/integration/security_test.rb

@@ -0,0 +1,64 @@
+require 'test_helper'
+
+module SecurityFilter
+  def add_one(input)
+    "#{input} + 1"
+  end
+end
+
+class SecurityTest < Test::Unit::TestCase
+  include Liquid
+
+  def test_no_instance_eval
+    text = %( {{ '1+1' | instance_eval }} )
+    expected = %| 1+1 |
+
+    assert_equal expected, Template.parse(text).render!(@assigns)
+  end
+
+  def test_no_existing_instance_eval
+    text = %( {{ '1+1' | __instance_eval__ }} )
+    expected = %| 1+1 |
+
+    assert_equal expected, Template.parse(text).render!(@assigns)
+  end
+
+
+  def test_no_instance_eval_after_mixing_in_new_filter
+    text = %( {{ '1+1' | instance_eval }} )
+    expected = %| 1+1 |
+
+    assert_equal expected, Template.parse(text).render!(@assigns)
+  end
+
+
+  def test_no_instance_eval_later_in_chain
+    text = %( {{ '1+1' | add_one | instance_eval }} )
+    expected = %| 1+1 + 1 |
+
+    assert_equal expected, Template.parse(text).render!(@assigns, :filters => SecurityFilter)
+  end
+
+  def test_does_not_add_filters_to_symbol_table
+    current_symbols = Symbol.all_symbols
+
+    test = %( {{ "some_string" | a_bad_filter }} )
+
+    template = Template.parse(test)
+    assert_equal [], (Symbol.all_symbols - current_symbols)
+
+    template.render!
+    assert_equal [], (Symbol.all_symbols - current_symbols)
+  end
+
+  def test_does_not_add_drop_methods_to_symbol_table
+    current_symbols = Symbol.all_symbols
+
+    assigns = { 'drop' => Drop.new }
+    assert_equal "", Template.parse("{{ drop.custom_method_1 }}", assigns).render!
+    assert_equal "", Template.parse("{{ drop.custom_method_2 }}", assigns).render!
+    assert_equal "", Template.parse("{{ drop.custom_method_3 }}", assigns).render!
+
+    assert_equal [], (Symbol.all_symbols - current_symbols)
+  end
+end # SecurityTest

test/integration/standard_filter_test.rb

@@ -0,0 +1,294 @@
+# encoding: utf-8
+
+require 'test_helper'
+
+class Filters
+  include Liquid::StandardFilters
+end
+
+class TestThing
+  def initialize
+    @foo = 0
+  end
+
+  def to_s
+    "woot: #{@foo}"
+  end
+
+  def [](whatever)
+    to_s
+  end
+
+  def to_liquid
+    @foo += 1
+    self
+  end
+end
+
+class TestDrop < Liquid::Drop
+  def test
+    "testfoo"
+  end
+end
+
+class TestEnumerable < Liquid::Drop
+  include Enumerable
+
+  def each(&block)
+    [ { "foo" => 1, "bar" => 2 }, { "foo" => 2, "bar" => 1 }, { "foo" => 3, "bar" => 3 } ].each(&block)
+  end
+end
+
+class StandardFiltersTest < Test::Unit::TestCase
+  include Liquid
+
+  def setup
+    @filters = Filters.new
+  end
+
+  def test_size
+    assert_equal 3, @filters.size([1,2,3])
+    assert_equal 0, @filters.size([])
+    assert_equal 0, @filters.size(nil)
+  end
+
+  def test_downcase
+    assert_equal 'testing', @filters.downcase("Testing")
+    assert_equal '', @filters.downcase(nil)
+  end
+
+  def test_upcase
+    assert_equal 'TESTING', @filters.upcase("Testing")
+    assert_equal '', @filters.upcase(nil)
+  end
+
+  def test_truncate
+    assert_equal '1234...', @filters.truncate('1234567890', 7)
+    assert_equal '1234567890', @filters.truncate('1234567890', 20)
+    assert_equal '...', @filters.truncate('1234567890', 0)
+    assert_equal '1234567890', @filters.truncate('1234567890')
+    assert_equal "测试...", @filters.truncate("测试测试测试测试", 5)
+  end
+
+  def test_split
+    assert_equal ['12','34'], @filters.split('12~34', '~')
+    assert_equal ['A? ',' ,Z'], @filters.split('A? ~ ~ ~ ,Z', '~ ~ ~')
+    assert_equal ['A?Z'], @filters.split('A?Z', '~')
+    # Regexp works although Liquid does not support.
+    assert_equal ['A','Z'], @filters.split('AxZ', /x/)
+  end
+
+  def test_escape
+    assert_equal '&lt;strong&gt;', @filters.escape('<strong>')
+    assert_equal '&lt;strong&gt;', @filters.h('<strong>')
+  end
+
+  def test_escape_once
+    assert_equal '&lt;strong&gt;Hulk&lt;/strong&gt;', @filters.escape_once('&lt;strong&gt;Hulk</strong>')
+  end
+
+  def test_truncatewords
+    assert_equal 'one two three', @filters.truncatewords('one two three', 4)
+    assert_equal 'one two...', @filters.truncatewords('one two three', 2)
+    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)
+    assert_equal "测试测试测试测试", @filters.truncatewords('测试测试测试测试', 5)
+  end
+
+  def test_strip_html
+    assert_equal 'test', @filters.strip_html("<div>test</div>")
+    assert_equal 'test', @filters.strip_html("<div id='test'>test</div>")
+    assert_equal '', @filters.strip_html("<script type='text/javascript'>document.write('some stuff');</script>")
+    assert_equal '', @filters.strip_html("<style type='text/css'>foo bar</style>")
+    assert_equal 'test', @filters.strip_html("<div\nclass='multiline'>test</div>")
+    assert_equal 'test', @filters.strip_html("<!-- foo bar \n test -->test")
+    assert_equal '', @filters.strip_html(nil)
+  end
+
+  def test_join
+    assert_equal '1 2 3 4', @filters.join([1,2,3,4])
+    assert_equal '1 - 2 - 3 - 4', @filters.join([1,2,3,4], ' - ')
+  end
+
+  def test_sort
+    assert_equal [1,2,3,4], @filters.sort([4,3,2,1])
+    assert_equal [{"a" => 1}, {"a" => 2}, {"a" => 3}, {"a" => 4}], @filters.sort([{"a" => 4}, {"a" => 3}, {"a" => 1}, {"a" => 2}], "a")
+  end
+
+  def test_reverse
+    assert_equal [4,3,2,1], @filters.reverse([1,2,3,4])
+  end
+
+  def test_map
+    assert_equal [1,2,3,4], @filters.map([{"a" => 1}, {"a" => 2}, {"a" => 3}, {"a" => 4}], 'a')
+    assert_template_result 'abc', "{{ ary | map:'foo' | map:'bar' }}",
+      'ary' => [{'foo' => {'bar' => 'a'}}, {'foo' => {'bar' => 'b'}}, {'foo' => {'bar' => 'c'}}]
+  end
+
+  def test_map_doesnt_call_arbitrary_stuff
+    assert_template_result "", '{{ "foo" | map: "__id__" }}'
+    assert_template_result "", '{{ "foo" | map: "inspect" }}'
+  end
+
+  def test_map_calls_to_liquid
+    t = TestThing.new
+    assert_template_result "woot: 1", '{{ foo | map: "whatever" }}', "foo" => [t]
+  end
+
+  def test_map_on_hashes
+    assert_template_result "4217", '{{ thing | map: "foo" | map: "bar" }}',
+      "thing" => { "foo" => [ { "bar" => 42 }, { "bar" => 17 } ] }
+  end
+
+  def test_sort_calls_to_liquid
+    t = TestThing.new
+    assert_template_result "woot: 1", '{{ foo | sort: "whatever" }}', "foo" => [t]
+  end
+
+  def test_map_over_proc
+    drop = TestDrop.new
+    p = Proc.new{ drop }
+    templ = '{{ procs | map: "test" }}'
+    assert_template_result "testfoo", templ, "procs" => [p]
+  end
+
+  def test_map_works_on_enumerables
+    assert_template_result "123", '{{ foo | map: "foo" }}', "foo" => TestEnumerable.new
+  end
+
+  def test_sort_works_on_enumerables
+    assert_template_result "213", '{{ foo | sort: "bar" | map: "foo" }}', "foo" => TestEnumerable.new
+  end
+
+  def test_date
+    assert_equal 'May', @filters.date(Time.parse("2006-05-05 10:00:00"), "%B")
+    assert_equal 'June', @filters.date(Time.parse("2006-06-05 10:00:00"), "%B")
+    assert_equal 'July', @filters.date(Time.parse("2006-07-05 10:00:00"), "%B")
+
+    assert_equal 'May', @filters.date("2006-05-05 10:00:00", "%B")
+    assert_equal 'June', @filters.date("2006-06-05 10:00:00", "%B")
+    assert_equal 'July', @filters.date("2006-07-05 10:00:00", "%B")
+
+    assert_equal '2006-07-05 10:00:00', @filters.date("2006-07-05 10:00:00", "")
+    assert_equal '2006-07-05 10:00:00', @filters.date("2006-07-05 10:00:00", "")
+    assert_equal '2006-07-05 10:00:00', @filters.date("2006-07-05 10:00:00", "")
+    assert_equal '2006-07-05 10:00:00', @filters.date("2006-07-05 10:00:00", nil)
+
+    assert_equal '07/05/2006', @filters.date("2006-07-05 10:00:00", "%m/%d/%Y")
+
+    assert_equal "07/16/2004", @filters.date("Fri Jul 16 01:00:00 2004", "%m/%d/%Y")
+    assert_equal "#{Date.today.year}", @filters.date('now', '%Y')
+    assert_equal "#{Date.today.year}", @filters.date('today', '%Y')
+
+    assert_equal nil, @filters.date(nil, "%B")
+
+    assert_equal "07/05/2006", @filters.date(1152098955, "%m/%d/%Y")
+    assert_equal "07/05/2006", @filters.date("1152098955", "%m/%d/%Y")
+  end
+
+
+  def test_first_last
+    assert_equal 1, @filters.first([1,2,3])
+    assert_equal 3, @filters.last([1,2,3])
+    assert_equal nil, @filters.first([])
+    assert_equal nil, @filters.last([])
+  end
+
+  def test_replace
+    assert_equal '2 2 2 2', @filters.replace('1 1 1 1', '1', 2)
+    assert_equal '2 1 1 1', @filters.replace_first('1 1 1 1', '1', 2)
+    assert_template_result '2 1 1 1', "{{ '1 1 1 1' | replace_first: '1', 2 }}"
+  end
+
+  def test_remove
+    assert_equal '   ', @filters.remove("a a a a", 'a')
+    assert_equal 'a a a', @filters.remove_first("a a a a", 'a ')
+    assert_template_result 'a a a', "{{ 'a a a a' | remove_first: 'a ' }}"
+  end
+
+  def test_pipes_in_string_arguments
+    assert_template_result 'foobar', "{{ 'foo|bar' | remove: '|' }}"
+  end
+
+  def test_strip
+    assert_template_result 'ab c', "{{ source | strip }}", 'source' => " ab c  "
+    assert_template_result 'ab c', "{{ source | strip }}", 'source' => " \tab c  \n \t"
+  end
+
+  def test_lstrip
+    assert_template_result 'ab c  ', "{{ source | lstrip }}", 'source' => " ab c  "
+    assert_template_result "ab c  \n \t", "{{ source | lstrip }}", 'source' => " \tab c  \n \t"
+  end
+
+  def test_rstrip
+    assert_template_result " ab c", "{{ source | rstrip }}", 'source' => " ab c  "
+    assert_template_result " \tab c", "{{ source | rstrip }}", 'source' => " \tab c  \n \t"
+  end
+
+  def test_strip_newlines
+    assert_template_result 'abc', "{{ source | strip_newlines }}", 'source' => "a\nb\nc"
+    assert_template_result 'abc', "{{ source | strip_newlines }}", 'source' => "a\r\nb\nc"
+  end
+
+  def test_newlines_to_br
+    assert_template_result "a<br />\nb<br />\nc", "{{ source | newline_to_br }}", 'source' => "a\nb\nc"
+  end
+
+  def test_plus
+    assert_template_result "2", "{{ 1 | plus:1 }}"
+    assert_template_result "2.0", "{{ '1' | plus:'1.0' }}"
+  end
+
+  def test_minus
+    assert_template_result "4", "{{ input | minus:operand }}", 'input' => 5, 'operand' => 1
+    assert_template_result "2.3", "{{ '4.3' | minus:'2' }}"
+  end
+
+  def test_times
+    assert_template_result "12", "{{ 3 | times:4 }}"
+    assert_template_result "0", "{{ 'foo' | times:4 }}"
+
+    assert_template_result "6", "{{ '2.1' | times:3 | replace: '.','-' | plus:0}}"
+
+    assert_template_result "7.25", "{{ 0.0725 | times:100 }}"
+  end
+
+  def test_divided_by
+    assert_template_result "4", "{{ 12 | divided_by:3 }}"
+    assert_template_result "4", "{{ 14 | divided_by:3 }}"
+
+    assert_template_result "5", "{{ 15 | divided_by:3 }}"
+    assert_equal "Liquid error: divided by 0", Template.parse("{{ 5 | divided_by:0 }}").render
+
+    assert_template_result "0.5", "{{ 2.0 | divided_by:4 }}"
+  end
+
+  def test_modulo
+    assert_template_result "1", "{{ 3 | modulo:2 }}"
+  end
+
+  def test_append
+    assigns = {'a' => 'bc', 'b' => 'd' }
+    assert_template_result('bcd',"{{ a | append: 'd'}}",assigns)
+    assert_template_result('bcd',"{{ a | append: b}}",assigns)
+  end
+
+  def test_prepend
+    assigns = {'a' => 'bc', 'b' => 'a' }
+    assert_template_result('abc',"{{ a | prepend: 'a'}}",assigns)
+    assert_template_result('abc',"{{ a | prepend: b}}",assigns)
+  end
+
+  def test_default
+    assert_equal "foo", @filters.default("foo", "bar")
+    assert_equal "bar", @filters.default(nil, "bar")
+    assert_equal "bar", @filters.default("", "bar")
+    assert_equal "bar", @filters.default(false, "bar")
+    assert_equal "bar", @filters.default([], "bar")
+    assert_equal "bar", @filters.default({}, "bar")
+  end
+
+  def test_cannot_access_private_methods
+    assert_template_result('a',"{{ 'a' | to_number }}")
+  end
+end # StandardFiltersTest

test/integration/tags/break_tag_test.rb

@@ -0,0 +1,16 @@
+require 'test_helper'
+
+class BreakTagTest < Test::Unit::TestCase
+  include Liquid
+
+  # tests that no weird errors are raised if break is called outside of a
+  # block
+  def test_break_with_no_block
+    assigns = {'i' => 1}
+    markup = '{% break %}'
+    expected = ''
+
+    assert_template_result(expected, markup, assigns)
+  end
+
+end

test/integration/tags/continue_tag_test.rb

@@ -0,0 +1,16 @@
+require 'test_helper'
+
+class ContinueTagTest < Test::Unit::TestCase
+  include Liquid
+
+  # tests that no weird errors are raised if continue is called outside of a
+  # block
+  def test_continue_with_no_block
+    assigns = {}
+    markup = '{% continue %}'
+    expected = ''
+
+    assert_template_result(expected, markup, assigns)
+  end
+
+end

test/integration/tags/for_tag_test.rb

@@ -0,0 +1,355 @@
+require 'test_helper'
+
+class ForTagTest < Test::Unit::TestCase
+  include Liquid
+
+  def test_for
+    assert_template_result(' yo  yo  yo  yo ','{%for item in array%} yo {%endfor%}','array' => [1,2,3,4])
+    assert_template_result('yoyo','{%for item in array%}yo{%endfor%}','array' => [1,2])
+    assert_template_result(' yo ','{%for item in array%} yo {%endfor%}','array' => [1])
+    assert_template_result('','{%for item in array%}{%endfor%}','array' => [1,2])
+    expected = <<HERE
+
+  yo
+
+  yo
+
+  yo
+
+HERE
+    template = <<HERE
+{%for item in array%}
+  yo
+{%endfor%}
+HERE
+    assert_template_result(expected,template,'array' => [1,2,3])
+  end
+
+  def test_for_reversed
+    assigns = {'array' => [ 1, 2, 3] }
+    assert_template_result('321','{%for item in array reversed %}{{item}}{%endfor%}',assigns)
+  end
+
+  def test_for_with_range
+    assert_template_result(' 1  2  3 ','{%for item in (1..3) %} {{item}} {%endfor%}')
+  end
+
+  def test_for_with_variable
+    assert_template_result(' 1  2  3 ','{%for item in array%} {{item}} {%endfor%}','array' => [1,2,3])
+    assert_template_result('123','{%for item in array%}{{item}}{%endfor%}','array' => [1,2,3])
+    assert_template_result('123','{% for item in array %}{{item}}{% endfor %}','array' => [1,2,3])
+    assert_template_result('abcd','{%for item in array%}{{item}}{%endfor%}','array' => ['a','b','c','d'])
+    assert_template_result('a b c','{%for item in array%}{{item}}{%endfor%}','array' => ['a',' ','b',' ','c'])
+    assert_template_result('abc','{%for item in array%}{{item}}{%endfor%}','array' => ['a','','b','','c'])
+  end
+
+  def test_for_helpers
+    assigns = {'array' => [1,2,3] }
+    assert_template_result(' 1/3  2/3  3/3 ',
+                           '{%for item in array%} {{forloop.index}}/{{forloop.length}} {%endfor%}',
+                           assigns)
+    assert_template_result(' 1  2  3 ', '{%for item in array%} {{forloop.index}} {%endfor%}', assigns)
+    assert_template_result(' 0  1  2 ', '{%for item in array%} {{forloop.index0}} {%endfor%}', assigns)
+    assert_template_result(' 2  1  0 ', '{%for item in array%} {{forloop.rindex0}} {%endfor%}', assigns)
+    assert_template_result(' 3  2  1 ', '{%for item in array%} {{forloop.rindex}} {%endfor%}', assigns)
+    assert_template_result(' true  false  false ', '{%for item in array%} {{forloop.first}} {%endfor%}', assigns)
+    assert_template_result(' false  false  true ', '{%for item in array%} {{forloop.last}} {%endfor%}', assigns)
+  end
+
+  def test_for_and_if
+    assigns = {'array' => [1,2,3] }
+    assert_template_result('+--',
+                           '{%for item in array%}{% if forloop.first %}+{% else %}-{% endif %}{%endfor%}',
+                           assigns)
+  end
+
+  def test_for_else
+    assert_template_result('+++', '{%for item in array%}+{%else%}-{%endfor%}', 'array'=>[1,2,3])
+    assert_template_result('-',   '{%for item in array%}+{%else%}-{%endfor%}', 'array'=>[])
+    assert_template_result('-',   '{%for item in array%}+{%else%}-{%endfor%}', 'array'=>nil)
+  end
+
+  def test_limiting
+    assigns = {'array' => [1,2,3,4,5,6,7,8,9,0]}
+    assert_template_result('12', '{%for i in array limit:2 %}{{ i }}{%endfor%}', assigns)
+    assert_template_result('1234', '{%for i in array limit:4 %}{{ i }}{%endfor%}', assigns)
+    assert_template_result('3456', '{%for i in array limit:4 offset:2 %}{{ i }}{%endfor%}', assigns)
+    assert_template_result('3456', '{%for i in array limit: 4 offset: 2 %}{{ i }}{%endfor%}', assigns)
+  end
+
+  def test_dynamic_variable_limiting
+    assigns = {'array' => [1,2,3,4,5,6,7,8,9,0]}
+    assigns['limit'] = 2
+    assigns['offset'] = 2
+
+    assert_template_result('34', '{%for i in array limit: limit offset: offset %}{{ i }}{%endfor%}', assigns)
+  end
+
+  def test_nested_for
+    assigns = {'array' => [[1,2],[3,4],[5,6]] }
+    assert_template_result('123456', '{%for item in array%}{%for i in item%}{{ i }}{%endfor%}{%endfor%}', assigns)
+  end
+
+  def test_offset_only
+    assigns = {'array' => [1,2,3,4,5,6,7,8,9,0]}
+    assert_template_result('890', '{%for i in array offset:7 %}{{ i }}{%endfor%}', assigns)
+  end
+
+  def test_pause_resume
+    assigns = {'array' => {'items' => [1,2,3,4,5,6,7,8,9,0]}}
+    markup = <<-MKUP
+      {%for i in array.items limit: 3 %}{{i}}{%endfor%}
+      next
+      {%for i in array.items offset:continue limit: 3 %}{{i}}{%endfor%}
+      next
+      {%for i in array.items offset:continue limit: 3 %}{{i}}{%endfor%}
+      MKUP
+    expected = <<-XPCTD
+      123
+      next
+      456
+      next
+      789
+      XPCTD
+    assert_template_result(expected,markup,assigns)
+  end
+
+  def test_pause_resume_limit
+    assigns = {'array' => {'items' => [1,2,3,4,5,6,7,8,9,0]}}
+    markup = <<-MKUP
+      {%for i in array.items limit:3 %}{{i}}{%endfor%}
+      next
+      {%for i in array.items offset:continue limit:3 %}{{i}}{%endfor%}
+      next
+      {%for i in array.items offset:continue limit:1 %}{{i}}{%endfor%}
+      MKUP
+    expected = <<-XPCTD
+      123
+      next
+      456
+      next
+      7
+      XPCTD
+    assert_template_result(expected,markup,assigns)
+  end
+
+  def test_pause_resume_BIG_limit
+    assigns = {'array' => {'items' => [1,2,3,4,5,6,7,8,9,0]}}
+    markup = <<-MKUP
+      {%for i in array.items limit:3 %}{{i}}{%endfor%}
+      next
+      {%for i in array.items offset:continue limit:3 %}{{i}}{%endfor%}
+      next
+      {%for i in array.items offset:continue limit:1000 %}{{i}}{%endfor%}
+      MKUP
+    expected = <<-XPCTD
+      123
+      next
+      456
+      next
+      7890
+      XPCTD
+      assert_template_result(expected,markup,assigns)
+  end
+
+
+  def test_pause_resume_BIG_offset
+    assigns = {'array' => {'items' => [1,2,3,4,5,6,7,8,9,0]}}
+    markup = %q({%for i in array.items limit:3 %}{{i}}{%endfor%}
+      next
+      {%for i in array.items offset:continue limit:3 %}{{i}}{%endfor%}
+      next
+      {%for i in array.items offset:continue limit:3 offset:1000 %}{{i}}{%endfor%})
+    expected = %q(123
+      next
+      456
+      next
+      )
+      assert_template_result(expected,markup,assigns)
+  end
+
+  def test_for_with_break
+    assigns = {'array' => {'items' => [1,2,3,4,5,6,7,8,9,10]}}
+
+    markup = '{% for i in array.items %}{% break %}{% endfor %}'
+    expected = ""
+    assert_template_result(expected,markup,assigns)
+
+    markup = '{% for i in array.items %}{{ i }}{% break %}{% endfor %}'
+    expected = "1"
+    assert_template_result(expected,markup,assigns)
+
+    markup = '{% for i in array.items %}{% break %}{{ i }}{% endfor %}'
+    expected = ""
+    assert_template_result(expected,markup,assigns)
+
+    markup = '{% for i in array.items %}{{ i }}{% if i > 3 %}{% break %}{% endif %}{% endfor %}'
+    expected = "1234"
+    assert_template_result(expected,markup,assigns)
+
+    # tests to ensure it only breaks out of the local for loop
+    # and not all of them.
+    assigns = {'array' => [[1,2],[3,4],[5,6]] }
+    markup = '{% for item in array %}' +
+               '{% for i in item %}' +
+                 '{% if i == 1 %}' +
+                   '{% break %}' +
+                 '{% endif %}' +
+                 '{{ i }}' +
+               '{% endfor %}' +
+             '{% endfor %}'
+    expected = '3456'
+    assert_template_result(expected, markup, assigns)
+
+    # test break does nothing when unreached
+    assigns = {'array' => {'items' => [1,2,3,4,5]}}
+    markup = '{% for i in array.items %}{% if i == 9999 %}{% break %}{% endif %}{{ i }}{% endfor %}'
+    expected = '12345'
+    assert_template_result(expected, markup, assigns)
+  end
+
+  def test_for_with_continue
+    assigns = {'array' => {'items' => [1,2,3,4,5]}}
+
+    markup = '{% for i in array.items %}{% continue %}{% endfor %}'
+    expected = ""
+    assert_template_result(expected,markup,assigns)
+
+    markup = '{% for i in array.items %}{{ i }}{% continue %}{% endfor %}'
+    expected = "12345"
+    assert_template_result(expected,markup,assigns)
+
+    markup = '{% for i in array.items %}{% continue %}{{ i }}{% endfor %}'
+    expected = ""
+    assert_template_result(expected,markup,assigns)
+
+    markup = '{% for i in array.items %}{% if i > 3 %}{% continue %}{% endif %}{{ i }}{% endfor %}'
+    expected = "123"
+    assert_template_result(expected,markup,assigns)
+
+    markup = '{% for i in array.items %}{% if i == 3 %}{% continue %}{% else %}{{ i }}{% endif %}{% endfor %}'
+    expected = "1245"
+    assert_template_result(expected,markup,assigns)
+
+    # tests to ensure it only continues the local for loop and not all of them.
+    assigns = {'array' => [[1,2],[3,4],[5,6]] }
+    markup = '{% for item in array %}' +
+               '{% for i in item %}' +
+                 '{% if i == 1 %}' +
+                   '{% continue %}' +
+                 '{% endif %}' +
+                 '{{ i }}' +
+               '{% endfor %}' +
+             '{% endfor %}'
+    expected = '23456'
+    assert_template_result(expected, markup, assigns)
+
+    # test continue does nothing when unreached
+    assigns = {'array' => {'items' => [1,2,3,4,5]}}
+    markup = '{% for i in array.items %}{% if i == 9999 %}{% continue %}{% endif %}{{ i }}{% endfor %}'
+    expected = '12345'
+    assert_template_result(expected, markup, assigns)
+  end
+
+  def test_for_tag_string
+    # ruby 1.8.7 "String".each => Enumerator with single "String" element.
+    # ruby 1.9.3 no longer supports .each on String though we mimic
+    # the functionality for backwards compatibility
+
+    assert_template_result('test string',
+                '{%for val in string%}{{val}}{%endfor%}',
+                'string' => "test string")
+
+    assert_template_result('test string',
+                '{%for val in string limit:1%}{{val}}{%endfor%}',
+                'string' => "test string")
+
+    assert_template_result('val-string-1-1-0-1-0-true-true-test string',
+                '{%for val in string%}' +
+                '{{forloop.name}}-' +
+                '{{forloop.index}}-' +
+                '{{forloop.length}}-' +
+                '{{forloop.index0}}-' +
+                '{{forloop.rindex}}-' +
+                '{{forloop.rindex0}}-' +
+                '{{forloop.first}}-' +
+                '{{forloop.last}}-' +
+                '{{val}}{%endfor%}',
+                'string' => "test string")
+  end
+
+  def test_blank_string_not_iterable
+    assert_template_result('', "{% for char in characters %}I WILL NOT BE OUTPUT{% endfor %}", 'characters' => '')
+  end
+
+  def test_bad_variable_naming_in_for_loop
+    assert_raise(Liquid::SyntaxError) do
+      Liquid::Template.parse('{% for a/b in x %}{% endfor %}')
+    end
+  end
+
+  def test_spacing_with_variable_naming_in_for_loop
+    expected = '12345'
+    template = '{% for       item   in   items %}{{item}}{% endfor %}'
+    assigns  = {'items' => [1,2,3,4,5]}
+    assert_template_result(expected, template, assigns)
+  end
+
+  class LoaderDrop < Liquid::Drop
+    attr_accessor :each_called, :load_slice_called
+
+    def initialize(data)
+      @data = data
+    end
+
+    def each
+      @each_called = true
+      @data.each { |el| yield el }
+    end
+
+    def load_slice(from, to)
+      @load_slice_called = true
+      @data[(from..to-1)]
+    end
+  end
+
+  def test_iterate_with_each_when_no_limit_applied
+    loader = LoaderDrop.new([1,2,3,4,5])
+    assigns = {'items' => loader}
+    expected = '12345'
+    template = '{% for item in items %}{{item}}{% endfor %}'
+    assert_template_result(expected, template, assigns)
+    assert loader.each_called
+    assert !loader.load_slice_called
+  end
+
+  def test_iterate_with_load_slice_when_limit_applied
+    loader = LoaderDrop.new([1,2,3,4,5])
+    assigns = {'items' => loader}
+    expected = '1'
+    template = '{% for item in items limit:1 %}{{item}}{% endfor %}'
+    assert_template_result(expected, template, assigns)
+    assert !loader.each_called
+    assert loader.load_slice_called
+  end
+
+  def test_iterate_with_load_slice_when_limit_and_offset_applied
+    loader = LoaderDrop.new([1,2,3,4,5])
+    assigns = {'items' => loader}
+    expected = '34'
+    template = '{% for item in items offset:2 limit:2 %}{{item}}{% endfor %}'
+    assert_template_result(expected, template, assigns)
+    assert !loader.each_called
+    assert loader.load_slice_called
+  end
+
+  def test_iterate_with_load_slice_returns_same_results_as_without
+    loader = LoaderDrop.new([1,2,3,4,5])
+    loader_assigns = {'items' => loader}
+    array_assigns = {'items' => [1,2,3,4,5]}
+    expected = '34'
+    template = '{% for item in items offset:2 limit:2 %}{{item}}{% endfor %}'
+    assert_template_result(expected, template, loader_assigns)
+    assert_template_result(expected, template, array_assigns)
+  end
+end

test/integration/tags/if_else_tag_test.rb

@@ -0,0 +1,166 @@
+require 'test_helper'
+
+class IfElseTagTest < Test::Unit::TestCase
+  include Liquid
+
+  def test_if
+    assert_template_result('  ',' {% if false %} this text should not go into the output {% endif %} ')
+    assert_template_result('  this text should go into the output  ',
+                           ' {% if true %} this text should go into the output {% endif %} ')
+    assert_template_result('  you rock ?','{% if false %} you suck {% endif %} {% if true %} you rock {% endif %}?')
+  end
+
+  def test_if_else
+    assert_template_result(' YES ','{% if false %} NO {% else %} YES {% endif %}')
+    assert_template_result(' YES ','{% if true %} YES {% else %} NO {% endif %}')
+    assert_template_result(' YES ','{% if "foo" %} YES {% else %} NO {% endif %}')
+  end
+
+  def test_if_boolean
+    assert_template_result(' YES ','{% if var %} YES {% endif %}', 'var' => true)
+  end
+
+  def test_if_or
+    assert_template_result(' YES ','{% if a or b %} YES {% endif %}', 'a' => true, 'b' => true)
+    assert_template_result(' YES ','{% if a or b %} YES {% endif %}', 'a' => true, 'b' => false)
+    assert_template_result(' YES ','{% if a or b %} YES {% endif %}', 'a' => false, 'b' => true)
+    assert_template_result('',     '{% if a or b %} YES {% endif %}', 'a' => false, 'b' => false)
+
+    assert_template_result(' YES ','{% if a or b or c %} YES {% endif %}', 'a' => false, 'b' => false, 'c' => true)
+    assert_template_result('',     '{% if a or b or c %} YES {% endif %}', 'a' => false, 'b' => false, 'c' => false)
+  end
+
+  def test_if_or_with_operators
+    assert_template_result(' YES ','{% if a == true or b == true %} YES {% endif %}', 'a' => true, 'b' => true)
+    assert_template_result(' YES ','{% if a == true or b == false %} YES {% endif %}', 'a' => true, 'b' => true)
+    assert_template_result('','{% if a == false or b == false %} YES {% endif %}', 'a' => true, 'b' => true)
+  end
+
+  def test_comparison_of_strings_containing_and_or_or
+    assert_nothing_raised do
+      awful_markup = "a == 'and' and b == 'or' and c == 'foo and bar' and d == 'bar or baz' and e == 'foo' and foo and bar"
+      assigns = {'a' => 'and', 'b' => 'or', 'c' => 'foo and bar', 'd' => 'bar or baz', 'e' => 'foo', 'foo' => true, 'bar' => true}
+      assert_template_result(' YES ',"{% if #{awful_markup} %} YES {% endif %}", assigns)
+    end
+  end
+
+  def test_comparison_of_expressions_starting_with_and_or_or
+    assigns = {'order' => {'items_count' => 0}, 'android' => {'name' => 'Roy'}}
+    assert_nothing_raised do
+      assert_template_result( "YES",
+                              "{% if android.name == 'Roy' %}YES{% endif %}",
+                              assigns)
+    end
+    assert_nothing_raised do
+      assert_template_result( "YES",
+                              "{% if order.items_count == 0 %}YES{% endif %}",
+                              assigns)
+    end
+  end
+
+  def test_if_and
+    assert_template_result(' YES ','{% if true and true %} YES {% endif %}')
+    assert_template_result('','{% if false and true %} YES {% endif %}')
+    assert_template_result('','{% if false and true %} YES {% endif %}')
+  end
+
+
+  def test_hash_miss_generates_false
+    assert_template_result('','{% if foo.bar %} NO {% endif %}', 'foo' => {})
+  end
+
+  def test_if_from_variable
+    assert_template_result('','{% if var %} NO {% endif %}', 'var' => false)
+    assert_template_result('','{% if var %} NO {% endif %}', 'var' => nil)
+    assert_template_result('','{% if foo.bar %} NO {% endif %}', 'foo' => {'bar' => false})
+    assert_template_result('','{% if foo.bar %} NO {% endif %}', 'foo' => {})
+    assert_template_result('','{% if foo.bar %} NO {% endif %}', 'foo' => nil)
+    assert_template_result('','{% if foo.bar %} NO {% endif %}', 'foo' => true)
+
+    assert_template_result(' YES ','{% if var %} YES {% endif %}', 'var' => "text")
+    assert_template_result(' YES ','{% if var %} YES {% endif %}', 'var' => true)
+    assert_template_result(' YES ','{% if var %} YES {% endif %}', 'var' => 1)
+    assert_template_result(' YES ','{% if var %} YES {% endif %}', 'var' => {})
+    assert_template_result(' YES ','{% if var %} YES {% endif %}', 'var' => [])
+    assert_template_result(' YES ','{% if "foo" %} YES {% endif %}')
+    assert_template_result(' YES ','{% if foo.bar %} YES {% endif %}', 'foo' => {'bar' => true})
+    assert_template_result(' YES ','{% if foo.bar %} YES {% endif %}', 'foo' => {'bar' => "text"})
+    assert_template_result(' YES ','{% if foo.bar %} YES {% endif %}', 'foo' => {'bar' => 1 })
+    assert_template_result(' YES ','{% if foo.bar %} YES {% endif %}', 'foo' => {'bar' => {} })
+    assert_template_result(' YES ','{% if foo.bar %} YES {% endif %}', 'foo' => {'bar' => [] })
+
+    assert_template_result(' YES ','{% if var %} NO {% else %} YES {% endif %}', 'var' => false)
+    assert_template_result(' YES ','{% if var %} NO {% else %} YES {% endif %}', 'var' => nil)
+    assert_template_result(' YES ','{% if var %} YES {% else %} NO {% endif %}', 'var' => true)
+    assert_template_result(' YES ','{% if "foo" %} YES {% else %} NO {% endif %}', 'var' => "text")
+
+    assert_template_result(' YES ','{% if foo.bar %} NO {% else %} YES {% endif %}', 'foo' => {'bar' => false})
+    assert_template_result(' YES ','{% if foo.bar %} YES {% else %} NO {% endif %}', 'foo' => {'bar' => true})
+    assert_template_result(' YES ','{% if foo.bar %} YES {% else %} NO {% endif %}', 'foo' => {'bar' => "text"})
+    assert_template_result(' YES ','{% if foo.bar %} NO {% else %} YES {% endif %}', 'foo' => {'notbar' => true})
+    assert_template_result(' YES ','{% if foo.bar %} NO {% else %} YES {% endif %}', 'foo' => {})
+    assert_template_result(' YES ','{% if foo.bar %} NO {% else %} YES {% endif %}', 'notfoo' => {'bar' => true})
+  end
+
+  def test_nested_if
+    assert_template_result('', '{% if false %}{% if false %} NO {% endif %}{% endif %}')
+    assert_template_result('', '{% if false %}{% if true %} NO {% endif %}{% endif %}')
+    assert_template_result('', '{% if true %}{% if false %} NO {% endif %}{% endif %}')
+    assert_template_result(' YES ', '{% if true %}{% if true %} YES {% endif %}{% endif %}')
+
+    assert_template_result(' YES ', '{% if true %}{% if true %} YES {% else %} NO {% endif %}{% else %} NO {% endif %}')
+    assert_template_result(' YES ', '{% if true %}{% if false %} NO {% else %} YES {% endif %}{% else %} NO {% endif %}')
+    assert_template_result(' YES ', '{% if false %}{% if true %} NO {% else %} NONO {% endif %}{% else %} YES {% endif %}')
+
+  end
+
+  def test_comparisons_on_null
+    assert_template_result('','{% if null < 10 %} NO {% endif %}')
+    assert_template_result('','{% if null <= 10 %} NO {% endif %}')
+    assert_template_result('','{% if null >= 10 %} NO {% endif %}')
+    assert_template_result('','{% if null > 10 %} NO {% endif %}')
+
+    assert_template_result('','{% if 10 < null %} NO {% endif %}')
+    assert_template_result('','{% if 10 <= null %} NO {% endif %}')
+    assert_template_result('','{% if 10 >= null %} NO {% endif %}')
+    assert_template_result('','{% if 10 > null %} NO {% endif %}')
+  end
+
+  def test_else_if
+    assert_template_result('0','{% if 0 == 0 %}0{% elsif 1 == 1%}1{% else %}2{% endif %}')
+    assert_template_result('1','{% if 0 != 0 %}0{% elsif 1 == 1%}1{% else %}2{% endif %}')
+    assert_template_result('2','{% if 0 != 0 %}0{% elsif 1 != 1%}1{% else %}2{% endif %}')
+
+    assert_template_result('elsif','{% if false %}if{% elsif true %}elsif{% endif %}')
+  end
+
+  def test_syntax_error_no_variable
+    assert_raise(SyntaxError){ assert_template_result('', '{% if jerry == 1 %}')}
+  end
+
+  def test_syntax_error_no_expression
+    assert_raise(SyntaxError) { assert_template_result('', '{% if %}') }
+  end
+
+  def test_if_with_custom_condition
+    Condition.operators['contains'] = :[]
+
+    assert_template_result('yes', %({% if 'bob' contains 'o' %}yes{% endif %}))
+    assert_template_result('no', %({% if 'bob' contains 'f' %}yes{% else %}no{% endif %}))
+  ensure
+    Condition.operators.delete 'contains'
+  end
+
+  def test_operators_are_ignored_unless_isolated
+    Condition.operators['contains'] = :[]
+
+    assert_template_result('yes',
+                           %({% if 'gnomeslab-and-or-liquid' contains 'gnomeslab-and-or-liquid' %}yes{% endif %}))
+  end
+
+  def test_operators_are_whitelisted
+    assert_raise(SyntaxError) do
+      assert_template_result('', %({% if 1 or throw or or 1 %}yes{% endif %}))
+    end
+  end
+end

test/integration/tags/include_tag_test.rb

@@ -0,0 +1,208 @@
+require 'test_helper'
+
+class TestFileSystem
+  def read_template_file(template_path, context)
+    case template_path
+    when "product"
+      "Product: {{ product.title }} "
+
+    when "locale_variables"
+      "Locale: {{echo1}} {{echo2}}"
+
+    when "variant"
+      "Variant: {{ variant.title }}"
+
+    when "nested_template"
+      "{% include 'header' %} {% include 'body' %} {% include 'footer' %}"
+
+    when "body"
+      "body {% include 'body_detail' %}"
+
+    when "nested_product_template"
+      "Product: {{ nested_product_template.title }} {%include 'details'%} "
+
+    when "recursively_nested_template"
+      "-{% include 'recursively_nested_template' %}"
+
+    when "pick_a_source"
+      "from TestFileSystem"
+
+    else
+      template_path
+    end
+  end
+end
+
+class OtherFileSystem
+  def read_template_file(template_path, context)
+    'from OtherFileSystem'
+  end
+end
+
+class CountingFileSystem
+  attr_reader :count
+  def read_template_file(template_path, context)
+    @count ||= 0
+    @count += 1
+    'from CountingFileSystem'
+  end
+end
+
+class CustomInclude < Liquid::Tag
+  Syntax = /(#{Liquid::QuotedFragment}+)(\s+(?:with|for)\s+(#{Liquid::QuotedFragment}+))?/o
+
+  def initialize(tag_name, markup, tokens)
+    markup =~ Syntax
+    @template_name = $1
+    super
+  end
+
+  def parse(tokens)
+  end
+
+  def blank?
+    false
+  end
+
+  def render(context)
+    @template_name[1..-2]
+  end
+end
+
+class IncludeTagTest < Test::Unit::TestCase
+  include Liquid
+
+  def setup
+    Liquid::Template.file_system = TestFileSystem.new
+  end
+
+  def test_include_tag_looks_for_file_system_in_registers_first
+    assert_equal 'from OtherFileSystem',
+      Template.parse("{% include 'pick_a_source' %}").render!({}, :registers => {:file_system => OtherFileSystem.new})
+  end
+
+
+  def test_include_tag_with
+    assert_template_result "Product: Draft 151cm ",
+      "{% include 'product' with products[0] %}", "products" => [ {'title' => 'Draft 151cm'}, {'title' => 'Element 155cm'} ]
+  end
+
+  def test_include_tag_with_default_name
+    assert_template_result "Product: Draft 151cm ",
+      "{% include 'product' %}", "product" => {'title' => 'Draft 151cm'}
+  end
+
+  def test_include_tag_for
+    assert_template_result "Product: Draft 151cm Product: Element 155cm ",
+      "{% include 'product' for products %}", "products" => [ {'title' => 'Draft 151cm'}, {'title' => 'Element 155cm'} ]
+  end
+
+  def test_include_tag_with_local_variables
+    assert_template_result "Locale: test123 ", "{% include 'locale_variables' echo1: 'test123' %}"
+  end
+
+  def test_include_tag_with_multiple_local_variables
+    assert_template_result "Locale: test123 test321",
+      "{% include 'locale_variables' echo1: 'test123', echo2: 'test321' %}"
+  end
+
+  def test_include_tag_with_multiple_local_variables_from_context
+    assert_template_result "Locale: test123 test321",
+      "{% include 'locale_variables' echo1: echo1, echo2: more_echos.echo2 %}",
+      'echo1' => 'test123', 'more_echos' => { "echo2" => 'test321'}
+  end
+
+  def test_nested_include_tag
+    assert_template_result "body body_detail", "{% include 'body' %}"
+
+    assert_template_result "header body body_detail footer", "{% include 'nested_template' %}"
+  end
+
+  def test_nested_include_with_variable
+    assert_template_result "Product: Draft 151cm details ",
+      "{% include 'nested_product_template' with product %}", "product" => {"title" => 'Draft 151cm'}
+
+    assert_template_result "Product: Draft 151cm details Product: Element 155cm details ",
+      "{% include 'nested_product_template' for products %}", "products" => [{"title" => 'Draft 151cm'}, {"title" => 'Element 155cm'}]
+  end
+
+  def test_recursively_included_template_does_not_produce_endless_loop
+
+    infinite_file_system = Class.new do
+      def read_template_file(template_path, context)
+        "-{% include 'loop' %}"
+      end
+    end
+
+    Liquid::Template.file_system = infinite_file_system.new
+
+    assert_raise(Liquid::StackLevelError) do
+      Template.parse("{% include 'loop' %}").render!
+    end
+
+  end
+
+  def test_backwards_compatability_support_for_overridden_read_template_file
+    infinite_file_system = Class.new do
+      def read_template_file(template_path) # testing only one argument here.
+        "- hi mom"
+      end
+    end
+
+    Liquid::Template.file_system = infinite_file_system.new
+
+    Template.parse("{% include 'hi_mom' %}").render!
+  end
+
+  def test_dynamically_choosen_template
+    assert_template_result "Test123", "{% include template %}", "template" => 'Test123'
+    assert_template_result "Test321", "{% include template %}", "template" => 'Test321'
+
+    assert_template_result "Product: Draft 151cm ", "{% include template for product %}",
+      "template" => 'product', 'product' => { 'title' => 'Draft 151cm'}
+  end
+
+  def test_include_tag_caches_second_read_of_same_partial
+    file_system = CountingFileSystem.new
+    assert_equal 'from CountingFileSystemfrom CountingFileSystem',
+      Template.parse("{% include 'pick_a_source' %}{% include 'pick_a_source' %}").render!({}, :registers => {:file_system => file_system})
+    assert_equal 1, file_system.count
+  end
+
+  def test_include_tag_doesnt_cache_partials_across_renders
+    file_system = CountingFileSystem.new
+    assert_equal 'from CountingFileSystem',
+      Template.parse("{% include 'pick_a_source' %}").render!({}, :registers => {:file_system => file_system})
+    assert_equal 1, file_system.count
+
+    assert_equal 'from CountingFileSystem',
+      Template.parse("{% include 'pick_a_source' %}").render!({}, :registers => {:file_system => file_system})
+    assert_equal 2, file_system.count
+  end
+
+  def test_include_tag_within_if_statement
+    assert_template_result "foo_if_true", "{% if true %}{% include 'foo_if_true' %}{% endif %}"
+  end
+
+  def test_custom_include_tag
+    original_tag = Liquid::Template.tags['include']
+    Liquid::Template.tags['include'] = CustomInclude
+    begin
+      assert_equal "custom_foo",
+        Template.parse("{% include 'custom_foo' %}").render!
+    ensure
+      Liquid::Template.tags['include'] = original_tag
+    end
+  end
+
+  def test_custom_include_tag_within_if_statement
+    original_tag = Liquid::Template.tags['include']
+    Liquid::Template.tags['include'] = CustomInclude
+    begin
+      assert_equal "custom_foo_if_true",
+        Template.parse("{% if true %}{% include 'custom_foo_if_true' %}{% endif %}").render!
+    ensure
+      Liquid::Template.tags['include'] = original_tag
+    end
+  end
+end # IncludeTagTest

test/integration/tags/increment_tag_test.rb

@@ -0,0 +1,24 @@
+require 'test_helper'
+
+class IncrementTagTest < Test::Unit::TestCase
+  include Liquid
+
+  def test_inc
+    assert_template_result('0','{%increment port %}', {})
+    assert_template_result('0 1','{%increment port %} {%increment port%}', {})
+    assert_template_result('0 0 1 2 1',
+                           '{%increment port %} {%increment starboard%} ' +
+                           '{%increment port %} {%increment port%} ' +
+                           '{%increment starboard %}', {})
+  end
+
+  def test_dec
+    assert_template_result('9','{%decrement port %}', { 'port' => 10})
+    assert_template_result('-1 -2','{%decrement port %} {%decrement port%}', {})
+    assert_template_result('1 5 2 2 5',
+                           '{%increment port %} {%increment starboard%} ' +
+                           '{%increment port %} {%decrement port%} ' +
+                           '{%decrement starboard %}', { 'port' => 1, 'starboard' => 5 })
+  end
+
+end

test/integration/tags/raw_tag_test.rb

@@ -0,0 +1,25 @@
+require 'test_helper'
+
+class RawTagTest < Test::Unit::TestCase
+  include Liquid
+
+  def test_tag_in_raw
+    assert_template_result '{% comment %} test {% endcomment %}',
+                           '{% raw %}{% comment %} test {% endcomment %}{% endraw %}'
+  end
+
+  def test_output_in_raw
+    assert_template_result '{{ test }}', '{% raw %}{{ test }}{% endraw %}'
+  end
+
+  def test_open_tag_in_raw
+    assert_template_result ' Foobar {% invalid ', '{% raw %} Foobar {% invalid {% endraw %}'
+    assert_template_result ' Foobar invalid %} ', '{% raw %} Foobar invalid %} {% endraw %}'
+    assert_template_result ' Foobar {{ invalid ', '{% raw %} Foobar {{ invalid {% endraw %}'
+    assert_template_result ' Foobar invalid }} ', '{% raw %} Foobar invalid }} {% endraw %}'
+    assert_template_result ' Foobar {% invalid {% {% endraw ', '{% raw %} Foobar {% invalid {% {% endraw {% endraw %}'
+    assert_template_result ' Foobar {% {% {% ', '{% raw %} Foobar {% {% {% {% endraw %}'
+    assert_template_result ' test {% raw %} {% endraw %}', '{% raw %} test {% raw %} {% {% endraw %}endraw %}'
+    assert_template_result ' Foobar {{ invalid 1', '{% raw %} Foobar {{ invalid {% endraw %}{{ 1 }}'
+  end
+end

test/integration/tags/standard_tag_test.rb

@@ -0,0 +1,297 @@
+require 'test_helper'
+
+class StandardTagTest < Test::Unit::TestCase
+  include Liquid
+
+  def test_no_transform
+    assert_template_result('this text should come out of the template without change...',
+                           'this text should come out of the template without change...')
+
+    assert_template_result('blah','blah')
+    assert_template_result('<blah>','<blah>')
+    assert_template_result('|,.:','|,.:')
+    assert_template_result('','')
+
+    text = %|this shouldnt see any transformation either but has multiple lines
+              as you can clearly see here ...|
+    assert_template_result(text,text)
+  end
+
+  def test_has_a_block_which_does_nothing
+    assert_template_result(%|the comment block should be removed  .. right?|,
+                           %|the comment block should be removed {%comment%} be gone.. {%endcomment%} .. right?|)
+
+    assert_template_result('','{%comment%}{%endcomment%}')
+    assert_template_result('','{%comment%}{% endcomment %}')
+    assert_template_result('','{% comment %}{%endcomment%}')
+    assert_template_result('','{% comment %}{% endcomment %}')
+    assert_template_result('','{%comment%}comment{%endcomment%}')
+    assert_template_result('','{% comment %}comment{% endcomment %}')
+    assert_template_result('','{% comment %} 1 {% comment %} 2 {% endcomment %} 3 {% endcomment %}')
+
+    assert_template_result('','{%comment%}{%blabla%}{%endcomment%}')
+    assert_template_result('','{% comment %}{% blabla %}{% endcomment %}')
+    assert_template_result('','{%comment%}{% endif %}{%endcomment%}')
+    assert_template_result('','{% comment %}{% endwhatever %}{% endcomment %}')
+    assert_template_result('','{% comment %}{% raw %} {{%%%%}}  }} { {% endcomment %} {% comment {% endraw %} {% endcomment %}')
+
+    assert_template_result('foobar','foo{%comment%}comment{%endcomment%}bar')
+    assert_template_result('foobar','foo{% comment %}comment{% endcomment %}bar')
+    assert_template_result('foobar','foo{%comment%} comment {%endcomment%}bar')
+    assert_template_result('foobar','foo{% comment %} comment {% endcomment %}bar')
+
+    assert_template_result('foo  bar','foo {%comment%} {%endcomment%} bar')
+    assert_template_result('foo  bar','foo {%comment%}comment{%endcomment%} bar')
+    assert_template_result('foo  bar','foo {%comment%} comment {%endcomment%} bar')
+
+    assert_template_result('foobar','foo{%comment%}
+                                     {%endcomment%}bar')
+  end
+
+  def test_hyphenated_assign
+    assigns = {'a-b' => '1' }
+    assert_template_result('a-b:1 a-b:2', 'a-b:{{a-b}} {%assign a-b = 2 %}a-b:{{a-b}}', assigns)
+  end
+
+  def test_assign_with_colon_and_spaces
+    assigns = {'var' => {'a:b c' => {'paged' => '1' }}}
+    assert_template_result('var2: 1', '{%assign var2 = var["a:b c"].paged %}var2: {{var2}}', assigns)
+  end
+
+  def test_capture
+    assigns = {'var' => 'content' }
+    assert_template_result('content foo content foo ',
+                           '{{ var2 }}{% capture var2 %}{{ var }} foo {% endcapture %}{{ var2 }}{{ var2 }}',
+                           assigns)
+  end
+
+  def test_capture_detects_bad_syntax
+    assert_raise(SyntaxError) do
+      assert_template_result('content foo content foo ',
+                             '{{ var2 }}{% capture %}{{ var }} foo {% endcapture %}{{ var2 }}{{ var2 }}',
+                             {'var' => 'content' })
+    end
+  end
+
+  def test_case
+    assigns = {'condition' => 2 }
+    assert_template_result(' its 2 ',
+                           '{% case condition %}{% when 1 %} its 1 {% when 2 %} its 2 {% endcase %}',
+                           assigns)
+
+    assigns = {'condition' => 1 }
+    assert_template_result(' its 1 ',
+                           '{% case condition %}{% when 1 %} its 1 {% when 2 %} its 2 {% endcase %}',
+                           assigns)
+
+    assigns = {'condition' => 3 }
+    assert_template_result('',
+                           '{% case condition %}{% when 1 %} its 1 {% when 2 %} its 2 {% endcase %}',
+                           assigns)
+
+    assigns = {'condition' => "string here" }
+    assert_template_result(' hit ',
+                           '{% case condition %}{% when "string here" %} hit {% endcase %}',
+                           assigns)
+
+    assigns = {'condition' => "bad string here" }
+    assert_template_result('',
+                           '{% case condition %}{% when "string here" %} hit {% endcase %}',\
+                           assigns)
+  end
+
+  def test_case_with_else
+    assigns = {'condition' => 5 }
+    assert_template_result(' hit ',
+                           '{% case condition %}{% when 5 %} hit {% else %} else {% endcase %}',
+                           assigns)
+
+    assigns = {'condition' => 6 }
+    assert_template_result(' else ',
+                           '{% case condition %}{% when 5 %} hit {% else %} else {% endcase %}',
+                           assigns)
+
+    assigns = {'condition' => 6 }
+    assert_template_result(' else ',
+                           '{% case condition %} {% when 5 %} hit {% else %} else {% endcase %}',
+                           assigns)
+  end
+
+  def test_case_on_size
+    assert_template_result('',  '{% case a.size %}{% when 1 %}1{% when 2 %}2{% endcase %}', 'a' => [])
+    assert_template_result('1', '{% case a.size %}{% when 1 %}1{% when 2 %}2{% endcase %}', 'a' => [1])
+    assert_template_result('2', '{% case a.size %}{% when 1 %}1{% when 2 %}2{% endcase %}', 'a' => [1, 1])
+    assert_template_result('',  '{% case a.size %}{% when 1 %}1{% when 2 %}2{% endcase %}', 'a' => [1, 1, 1])
+    assert_template_result('',  '{% case a.size %}{% when 1 %}1{% when 2 %}2{% endcase %}', 'a' => [1, 1, 1, 1])
+    assert_template_result('',  '{% case a.size %}{% when 1 %}1{% when 2 %}2{% endcase %}', 'a' => [1, 1, 1, 1, 1])
+  end
+
+  def test_case_on_size_with_else
+    assert_template_result('else',
+                           '{% case a.size %}{% when 1 %}1{% when 2 %}2{% else %}else{% endcase %}',
+                           'a' => [])
+
+    assert_template_result('1',
+                           '{% case a.size %}{% when 1 %}1{% when 2 %}2{% else %}else{% endcase %}',
+                           'a' => [1])
+
+    assert_template_result('2',
+                           '{% case a.size %}{% when 1 %}1{% when 2 %}2{% else %}else{% endcase %}',
+                           'a' => [1, 1])
+
+    assert_template_result('else',
+                           '{% case a.size %}{% when 1 %}1{% when 2 %}2{% else %}else{% endcase %}',
+                           'a' => [1, 1, 1])
+
+    assert_template_result('else',
+                           '{% case a.size %}{% when 1 %}1{% when 2 %}2{% else %}else{% endcase %}',
+                           'a' => [1, 1, 1, 1])
+
+    assert_template_result('else',
+                           '{% case a.size %}{% when 1 %}1{% when 2 %}2{% else %}else{% endcase %}',
+                           'a' => [1, 1, 1, 1, 1])
+  end
+
+  def test_case_on_length_with_else
+    assert_template_result('else',
+                           '{% case a.empty? %}{% when true %}true{% when false %}false{% else %}else{% endcase %}',
+                           {})
+
+    assert_template_result('false',
+                           '{% case false %}{% when true %}true{% when false %}false{% else %}else{% endcase %}',
+                           {})
+
+    assert_template_result('true',
+                           '{% case true %}{% when true %}true{% when false %}false{% else %}else{% endcase %}',
+                           {})
+
+    assert_template_result('else',
+                           '{% case NULL %}{% when true %}true{% when false %}false{% else %}else{% endcase %}',
+                           {})
+  end
+
+  def test_assign_from_case
+    # Example from the shopify forums
+    code = %q({% case collection.handle %}{% when 'menswear-jackets' %}{% assign ptitle = 'menswear' %}{% when 'menswear-t-shirts' %}{% assign ptitle = 'menswear' %}{% else %}{% assign ptitle = 'womenswear' %}{% endcase %}{{ ptitle }})
+    template = Liquid::Template.parse(code)
+    assert_equal "menswear",   template.render!("collection" => {'handle' => 'menswear-jackets'})
+    assert_equal "menswear",   template.render!("collection" => {'handle' => 'menswear-t-shirts'})
+    assert_equal "womenswear", template.render!("collection" => {'handle' => 'x'})
+    assert_equal "womenswear", template.render!("collection" => {'handle' => 'y'})
+    assert_equal "womenswear", template.render!("collection" => {'handle' => 'z'})
+  end
+
+  def test_case_when_or
+    code = '{% case condition %}{% when 1 or 2 or 3 %} its 1 or 2 or 3 {% when 4 %} its 4 {% endcase %}'
+    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 1 })
+    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 2 })
+    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 3 })
+    assert_template_result(' its 4 ', code, {'condition' => 4 })
+    assert_template_result('', code, {'condition' => 5 })
+
+    code = '{% case condition %}{% when 1 or "string" or null %} its 1 or 2 or 3 {% when 4 %} its 4 {% endcase %}'
+    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 1 })
+    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 'string' })
+    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => nil })
+    assert_template_result('', code, {'condition' => 'something else' })
+  end
+
+  def test_case_when_comma
+    code = '{% case condition %}{% when 1, 2, 3 %} its 1 or 2 or 3 {% when 4 %} its 4 {% endcase %}'
+    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 1 })
+    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 2 })
+    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 3 })
+    assert_template_result(' its 4 ', code, {'condition' => 4 })
+    assert_template_result('', code, {'condition' => 5 })
+
+    code = '{% case condition %}{% when 1, "string", null %} its 1 or 2 or 3 {% when 4 %} its 4 {% endcase %}'
+    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 1 })
+    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 'string' })
+    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => nil })
+    assert_template_result('', code, {'condition' => 'something else' })
+  end
+
+  def test_assign
+    assert_template_result 'variable', '{% assign a = "variable"%}{{a}}'
+  end
+
+  def test_assign_unassigned
+    assigns = { 'var' => 'content' }
+    assert_template_result('var2:  var2:content', 'var2:{{var2}} {%assign var2 = var%} var2:{{var2}}', assigns)
+  end
+
+  def test_assign_an_empty_string
+    assert_template_result '', '{% assign a = ""%}{{a}}'
+  end
+
+  def test_assign_is_global
+    assert_template_result 'variable', '{%for i in (1..2) %}{% assign a = "variable"%}{% endfor %}{{a}}'
+  end
+
+  def test_case_detects_bad_syntax
+    assert_raise(SyntaxError) do
+      assert_template_result('',  '{% case false %}{% when %}true{% endcase %}', {})
+    end
+
+    assert_raise(SyntaxError) do
+      assert_template_result('',  '{% case false %}{% huh %}true{% endcase %}', {})
+    end
+
+  end
+
+  def test_cycle
+    assert_template_result('one','{%cycle "one", "two"%}')
+    assert_template_result('one two','{%cycle "one", "two"%} {%cycle "one", "two"%}')
+    assert_template_result(' two','{%cycle "", "two"%} {%cycle "", "two"%}')
+
+    assert_template_result('one two one','{%cycle "one", "two"%} {%cycle "one", "two"%} {%cycle "one", "two"%}')
+
+    assert_template_result('text-align: left text-align: right',
+      '{%cycle "text-align: left", "text-align: right" %} {%cycle "text-align: left", "text-align: right"%}')
+  end
+
+  def test_multiple_cycles
+    assert_template_result('1 2 1 1 2 3 1',
+      '{%cycle 1,2%} {%cycle 1,2%} {%cycle 1,2%} {%cycle 1,2,3%} {%cycle 1,2,3%} {%cycle 1,2,3%} {%cycle 1,2,3%}')
+  end
+
+  def test_multiple_named_cycles
+    assert_template_result('one one two two one one',
+      '{%cycle 1: "one", "two" %} {%cycle 2: "one", "two" %} {%cycle 1: "one", "two" %} {%cycle 2: "one", "two" %} {%cycle 1: "one", "two" %} {%cycle 2: "one", "two" %}')
+  end
+
+  def test_multiple_named_cycles_with_names_from_context
+    assigns = {"var1" => 1, "var2" => 2 }
+    assert_template_result('one one two two one one',
+      '{%cycle var1: "one", "two" %} {%cycle var2: "one", "two" %} {%cycle var1: "one", "two" %} {%cycle var2: "one", "two" %} {%cycle var1: "one", "two" %} {%cycle var2: "one", "two" %}', assigns)
+  end
+
+  def test_size_of_array
+    assigns = {"array" => [1,2,3,4]}
+    assert_template_result('array has 4 elements', "array has {{ array.size }} elements", assigns)
+  end
+
+  def test_size_of_hash
+    assigns = {"hash" => {:a => 1, :b => 2, :c=> 3, :d => 4}}
+    assert_template_result('hash has 4 elements', "hash has {{ hash.size }} elements", assigns)
+  end
+
+  def test_illegal_symbols
+    assert_template_result('', '{% if true == empty %}?{% endif %}', {})
+    assert_template_result('', '{% if true == null %}?{% endif %}', {})
+    assert_template_result('', '{% if empty == true %}?{% endif %}', {})
+    assert_template_result('', '{% if null == true %}?{% endif %}', {})
+  end
+
+  def test_ifchanged
+    assigns = {'array' => [ 1, 1, 2, 2, 3, 3] }
+    assert_template_result('123','{%for item in array%}{%ifchanged%}{{item}}{% endifchanged %}{%endfor%}',assigns)
+
+    assigns = {'array' => [ 1, 1, 1, 1] }
+    assert_template_result('1','{%for item in array%}{%ifchanged%}{{item}}{% endifchanged %}{%endfor%}',assigns)
+  end
+
+  def test_multiline_tag
+    assert_template_result '0 1 2 3', "0{%\nfor i in (1..3)\n%} {{\ni\n}}{%\nendfor\n%}"
+  end
+end # StandardTagTest

test/integration/tags/statements_test.rb

@@ -0,0 +1,113 @@
+require 'test_helper'
+
+class StatementsTest < Test::Unit::TestCase
+  include Liquid
+
+  def test_true_eql_true
+    text = ' {% if true == true %} true {% else %} false {% endif %} '
+    assert_template_result '  true  ', text
+  end
+
+  def test_true_not_eql_true
+    text = ' {% if true != true %} true {% else %} false {% endif %} '
+    assert_template_result '  false  ', text
+  end
+
+  def test_true_lq_true
+    text = ' {% if 0 > 0 %} true {% else %} false {% endif %} '
+    assert_template_result '  false  ', text
+  end
+
+  def test_one_lq_zero
+    text = ' {% if 1 > 0 %} true {% else %} false {% endif %} '
+    assert_template_result '  true  ', text
+  end
+
+  def test_zero_lq_one
+    text = ' {% if 0 < 1 %} true {% else %} false {% endif %} '
+    assert_template_result '  true  ', text
+  end
+
+  def test_zero_lq_or_equal_one
+    text = ' {% if 0 <= 0 %} true {% else %} false {% endif %} '
+    assert_template_result '  true  ', text
+  end
+
+  def test_zero_lq_or_equal_one_involving_nil
+    text = ' {% if null <= 0 %} true {% else %} false {% endif %} '
+    assert_template_result '  false  ', text
+
+
+    text = ' {% if 0 <= null %} true {% else %} false {% endif %} '
+    assert_template_result '  false  ', text
+  end
+
+  def test_zero_lqq_or_equal_one
+    text = ' {% if 0 >= 0 %} true {% else %} false {% endif %} '
+    assert_template_result '  true  ', text
+  end
+
+  def test_strings
+    text = " {% if 'test' == 'test' %} true {% else %} false {% endif %} "
+    assert_template_result '  true  ', text
+  end
+
+  def test_strings_not_equal
+    text = " {% if 'test' != 'test' %} true {% else %} false {% endif %} "
+    assert_template_result '  false  ', text
+  end
+
+  def test_var_strings_equal
+    text = ' {% if var == "hello there!" %} true {% else %} false {% endif %} '
+    assert_template_result '  true  ', text, 'var' => 'hello there!'
+  end
+
+  def test_var_strings_are_not_equal
+    text = ' {% if "hello there!" == var %} true {% else %} false {% endif %} '
+    assert_template_result '  true  ', text, 'var' => 'hello there!'
+  end
+
+  def test_var_and_long_string_are_equal
+    text = " {% if var == 'hello there!' %} true {% else %} false {% endif %} "
+    assert_template_result '  true  ', text, 'var' => 'hello there!'
+  end
+
+
+  def test_var_and_long_string_are_equal_backwards
+    text = " {% if 'hello there!' == var %} true {% else %} false {% endif %} "
+    assert_template_result '  true  ', text, 'var' => 'hello there!'
+  end
+
+  #def test_is_nil
+  #  text = %| {% if var != nil %} true {% else %} false {% end %} |
+  #  @template.assigns = { 'var' => 'hello there!'}
+  #  expected = %|  true  |
+  #  assert_equal expected, @template.parse(text)
+  #end
+
+  def test_is_collection_empty
+    text = ' {% if array == empty %} true {% else %} false {% endif %} '
+    assert_template_result '  true  ', text, 'array' => []
+  end
+
+  def test_is_not_collection_empty
+    text = ' {% if array == empty %} true {% else %} false {% endif %} '
+    assert_template_result '  false  ', text, 'array' => [1,2,3]
+  end
+
+  def test_nil
+    text = ' {% if var == nil %} true {% else %} false {% endif %} '
+    assert_template_result '  true  ', text, 'var' => nil
+
+    text = ' {% if var == null %} true {% else %} false {% endif %} '
+    assert_template_result '  true  ', text, 'var' => nil
+  end
+
+  def test_not_nil
+    text = ' {% if var != nil %} true {% else %} false {% endif %} '
+    assert_template_result '  true  ', text, 'var' => 1
+
+    text = ' {% if var != null %} true {% else %} false {% endif %} '
+    assert_template_result '  true  ', text, 'var' => 1
+  end
+end # StatementsTest

test/integration/tags/table_row_test.rb

@@ -0,0 +1,63 @@
+require 'test_helper'
+
+class TableRowTest < Test::Unit::TestCase
+  include Liquid
+
+  class ArrayDrop < Liquid::Drop
+    include Enumerable
+
+    def initialize(array)
+      @array = array
+    end
+
+    def each(&block)
+      @array.each(&block)
+    end
+  end
+
+  def test_table_row
+
+    assert_template_result("<tr class=\"row1\">\n<td class=\"col1\"> 1 </td><td class=\"col2\"> 2 </td><td class=\"col3\"> 3 </td></tr>\n<tr class=\"row2\"><td class=\"col1\"> 4 </td><td class=\"col2\"> 5 </td><td class=\"col3\"> 6 </td></tr>\n",
+                           '{% tablerow n in numbers cols:3%} {{n}} {% endtablerow %}',
+                           'numbers' => [1,2,3,4,5,6])
+
+    assert_template_result("<tr class=\"row1\">\n</tr>\n",
+                           '{% tablerow n in numbers cols:3%} {{n}} {% endtablerow %}',
+                           'numbers' => [])
+  end
+
+  def test_table_row_with_different_cols
+    assert_template_result("<tr class=\"row1\">\n<td class=\"col1\"> 1 </td><td class=\"col2\"> 2 </td><td class=\"col3\"> 3 </td><td class=\"col4\"> 4 </td><td class=\"col5\"> 5 </td></tr>\n<tr class=\"row2\"><td class=\"col1\"> 6 </td></tr>\n",
+                           '{% tablerow n in numbers cols:5%} {{n}} {% endtablerow %}',
+                           'numbers' => [1,2,3,4,5,6])
+
+  end
+
+  def test_table_col_counter
+    assert_template_result("<tr class=\"row1\">\n<td class=\"col1\">1</td><td class=\"col2\">2</td></tr>\n<tr class=\"row2\"><td class=\"col1\">1</td><td class=\"col2\">2</td></tr>\n<tr class=\"row3\"><td class=\"col1\">1</td><td class=\"col2\">2</td></tr>\n",
+                           '{% tablerow n in numbers cols:2%}{{tablerowloop.col}}{% endtablerow %}',
+                           'numbers' => [1,2,3,4,5,6])
+  end
+
+  def test_quoted_fragment
+    assert_template_result("<tr class=\"row1\">\n<td class=\"col1\"> 1 </td><td class=\"col2\"> 2 </td><td class=\"col3\"> 3 </td></tr>\n<tr class=\"row2\"><td class=\"col1\"> 4 </td><td class=\"col2\"> 5 </td><td class=\"col3\"> 6 </td></tr>\n",
+                           "{% tablerow n in collections.frontpage cols:3%} {{n}} {% endtablerow %}",
+                           'collections' => {'frontpage' => [1,2,3,4,5,6]})
+    assert_template_result("<tr class=\"row1\">\n<td class=\"col1\"> 1 </td><td class=\"col2\"> 2 </td><td class=\"col3\"> 3 </td></tr>\n<tr class=\"row2\"><td class=\"col1\"> 4 </td><td class=\"col2\"> 5 </td><td class=\"col3\"> 6 </td></tr>\n",
+                           "{% tablerow n in collections['frontpage'] cols:3%} {{n}} {% endtablerow %}",
+                           'collections' => {'frontpage' => [1,2,3,4,5,6]})
+
+  end
+
+  def test_enumerable_drop
+    assert_template_result("<tr class=\"row1\">\n<td class=\"col1\"> 1 </td><td class=\"col2\"> 2 </td><td class=\"col3\"> 3 </td></tr>\n<tr class=\"row2\"><td class=\"col1\"> 4 </td><td class=\"col2\"> 5 </td><td class=\"col3\"> 6 </td></tr>\n",
+                           '{% tablerow n in numbers cols:3%} {{n}} {% endtablerow %}',
+                           'numbers' => ArrayDrop.new([1,2,3,4,5,6]))
+  end
+
+  def test_offset_and_limit
+    assert_template_result("<tr class=\"row1\">\n<td class=\"col1\"> 1 </td><td class=\"col2\"> 2 </td><td class=\"col3\"> 3 </td></tr>\n<tr class=\"row2\"><td class=\"col1\"> 4 </td><td class=\"col2\"> 5 </td><td class=\"col3\"> 6 </td></tr>\n",
+                           '{% tablerow n in numbers cols:3 offset:1 limit:6%} {{n}} {% endtablerow %}',
+                           'numbers' => [0,1,2,3,4,5,6,7])
+  end
+end

test/integration/tags/unless_else_tag_test.rb

@@ -0,0 +1,26 @@
+require 'test_helper'
+
+class UnlessElseTagTest < Test::Unit::TestCase
+  include Liquid
+
+  def test_unless
+    assert_template_result('  ',' {% unless true %} this text should not go into the output {% endunless %} ')
+    assert_template_result('  this text should go into the output  ',
+                           ' {% unless false %} this text should go into the output {% endunless %} ')
+    assert_template_result('  you rock ?','{% unless true %} you suck {% endunless %} {% unless false %} you rock {% endunless %}?')
+  end
+
+  def test_unless_else
+    assert_template_result(' YES ','{% unless true %} NO {% else %} YES {% endunless %}')
+    assert_template_result(' YES ','{% unless false %} YES {% else %} NO {% endunless %}')
+    assert_template_result(' YES ','{% unless "foo" %} NO {% else %} YES {% endunless %}')
+  end
+
+  def test_unless_in_loop
+    assert_template_result '23', '{% for i in choices %}{% unless i %}{{ forloop.index }}{% endunless %}{% endfor %}', 'choices' => [1, nil, false]
+  end
+
+  def test_unless_else_in_loop
+    assert_template_result ' TRUE  2  3 ', '{% for i in choices %}{% unless i %} {{ forloop.index }} {% else %} TRUE {% endunless %}{% endfor %}', 'choices' => [1, nil, false]
+  end
+end # UnlessElseTest

test/integration/template_test.rb

@@ -0,0 +1,140 @@
+require 'test_helper'
+
+class TemplateContextDrop < Liquid::Drop
+  def before_method(method)
+    method
+  end
+
+  def foo
+    'fizzbuzz'
+  end
+
+  def baz
+    @context.registers['lulz']
+  end
+end
+
+class SomethingWithLength
+  def length
+    nil
+  end
+
+  liquid_methods :length
+end
+
+class TemplateTest < Test::Unit::TestCase
+  include Liquid
+
+  def test_instance_assigns_persist_on_same_template_object_between_parses
+    t = Template.new
+    assert_equal 'from instance assigns', t.parse("{% assign foo = 'from instance assigns' %}{{ foo }}").render!
+    assert_equal 'from instance assigns', t.parse("{{ foo }}").render!
+  end
+
+  def test_instance_assigns_persist_on_same_template_parsing_between_renders
+    t = Template.new.parse("{{ foo }}{% assign foo = 'foo' %}{{ foo }}")
+    assert_equal 'foo', t.render!
+    assert_equal 'foofoo', t.render!
+  end
+
+  def test_custom_assigns_do_not_persist_on_same_template
+    t = Template.new
+    assert_equal 'from custom assigns', t.parse("{{ foo }}").render!('foo' => 'from custom assigns')
+    assert_equal '', t.parse("{{ foo }}").render!
+  end
+
+  def test_custom_assigns_squash_instance_assigns
+    t = Template.new
+    assert_equal 'from instance assigns', t.parse("{% assign foo = 'from instance assigns' %}{{ foo }}").render!
+    assert_equal 'from custom assigns', t.parse("{{ foo }}").render!('foo' => 'from custom assigns')
+  end
+
+  def test_persistent_assigns_squash_instance_assigns
+    t = Template.new
+    assert_equal 'from instance assigns', t.parse("{% assign foo = 'from instance assigns' %}{{ foo }}").render!
+    t.assigns['foo'] = 'from persistent assigns'
+    assert_equal 'from persistent assigns', t.parse("{{ foo }}").render!
+  end
+
+  def test_lambda_is_called_once_from_persistent_assigns_over_multiple_parses_and_renders
+    t = Template.new
+    t.assigns['number'] = lambda { @global ||= 0; @global += 1 }
+    assert_equal '1', t.parse("{{number}}").render!
+    assert_equal '1', t.parse("{{number}}").render!
+    assert_equal '1', t.render!
+    @global = nil
+  end
+
+  def test_lambda_is_called_once_from_custom_assigns_over_multiple_parses_and_renders
+    t = Template.new
+    assigns = {'number' => lambda { @global ||= 0; @global += 1 }}
+    assert_equal '1', t.parse("{{number}}").render!(assigns)
+    assert_equal '1', t.parse("{{number}}").render!(assigns)
+    assert_equal '1', t.render!(assigns)
+    @global = nil
+  end
+
+  def test_resource_limits_works_with_custom_length_method
+    t = Template.parse("{% assign foo = bar %}")
+    t.resource_limits = { :render_length_limit => 42 }
+    assert_equal "", t.render!("bar" => SomethingWithLength.new)
+  end
+
+  def test_resource_limits_render_length
+    t = Template.parse("0123456789")
+    t.resource_limits = { :render_length_limit => 5 }
+    assert_equal "Liquid error: Memory limits exceeded", t.render()
+    assert t.resource_limits[:reached]
+    t.resource_limits = { :render_length_limit => 10 }
+    assert_equal "0123456789", t.render!()
+    assert_not_nil t.resource_limits[:render_length_current]
+  end
+
+  def test_resource_limits_render_score
+    t = Template.parse("{% for a in (1..10) %} {% for a in (1..10) %} foo {% endfor %} {% endfor %}")
+    t.resource_limits = { :render_score_limit => 50 }
+    assert_equal "Liquid error: Memory limits exceeded", t.render()
+    assert t.resource_limits[:reached]
+    t = Template.parse("{% for a in (1..100) %} foo {% endfor %}")
+    t.resource_limits = { :render_score_limit => 50 }
+    assert_equal "Liquid error: Memory limits exceeded", t.render()
+    assert t.resource_limits[:reached]
+    t.resource_limits = { :render_score_limit => 200 }
+    assert_equal (" foo " * 100), t.render!()
+    assert_not_nil t.resource_limits[:render_score_current]
+  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!()
+    assert_not_nil t.resource_limits[:assign_score_current]
+  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 }
+    assert_equal "Liquid error: Memory limits exceeded", t.render()
+    assert t.resource_limits[:reached]
+  end
+
+  def test_resource_limits_hash_in_template_gets_updated_even_if_no_limits_are_set
+    t = Template.parse("{% for a in (1..100) %} {% assign foo = 1 %} {% endfor %}")
+    t.render!()
+    assert t.resource_limits[:assign_score_current] > 0
+    assert t.resource_limits[:render_score_current] > 0
+    assert t.resource_limits[:render_length_current] > 0
+  end
+
+  def test_can_use_drop_as_context
+    t = Template.new
+    t.registers['lulz'] = 'haha'
+    drop = TemplateContextDrop.new
+    assert_equal 'fizzbuzz', t.parse('{{foo}}').render!(drop)
+    assert_equal 'bar', t.parse('{{bar}}').render!(drop)
+    assert_equal 'haha', t.parse("{{baz}}").render!(drop)
+  end
+end

test/integration/variable_test.rb

@@ -0,0 +1,68 @@
+require 'test_helper'
+
+class VariableTest < Test::Unit::TestCase
+  include Liquid
+
+  def test_simple_variable
+    template = Template.parse(%|{{test}}|)
+    assert_equal 'worked', template.render!('test' => 'worked')
+    assert_equal 'worked wonderfully', template.render!('test' => 'worked wonderfully')
+  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_ignore_unknown
+    template = Template.parse(%|{{ test }}|)
+    assert_equal '', template.render!
+  end
+
+  def test_hash_scoping
+    template = Template.parse(%|{{ test.test }}|)
+    assert_equal 'worked', template.render!('test' => {'test' => 'worked'})
+  end
+
+  def test_preset_assigns
+    template = Template.parse(%|{{ test }}|)
+    template.assigns['test'] = 'worked'
+    assert_equal 'worked', template.render!
+  end
+
+  def test_reuse_parsed_template
+    template = Template.parse(%|{{ greeting }} {{ name }}|)
+    template.assigns['greeting'] = 'Goodbye'
+    assert_equal 'Hello Tobi', template.render!('greeting' => 'Hello', 'name' => 'Tobi')
+    assert_equal 'Hello ', template.render!('greeting' => 'Hello', 'unknown' => 'Tobi')
+    assert_equal 'Hello Brian', template.render!('greeting' => 'Hello', 'name' => 'Brian')
+    assert_equal 'Goodbye Brian', template.render!('name' => 'Brian')
+    assert_equal({'greeting'=>'Goodbye'}, template.assigns)
+  end
+
+  def test_assigns_not_polluted_from_template
+    template = Template.parse(%|{{ test }}{% assign test = 'bar' %}{{ test }}|)
+    template.assigns['test'] = 'baz'
+    assert_equal 'bazbar', template.render!
+    assert_equal 'bazbar', template.render!
+    assert_equal 'foobar', template.render!('test' => 'foo')
+    assert_equal 'bazbar', template.render!
+  end
+
+  def test_hash_with_default_proc
+    template = Template.parse(%|Hello {{ test }}|)
+    assigns = Hash.new { |h,k| raise "Unknown variable '#{k}'" }
+    assigns['test'] = 'Tobi'
+    assert_equal 'Hello Tobi', template.render!(assigns)
+    assigns.delete('test')
+    e = assert_raises(RuntimeError) {
+      template.render!(assigns)
+    }
+    assert_equal "Unknown variable 'test'", e.message
+  end
+
+  def test_multiline_variable
+    assert_equal 'worked', Template.parse("{{\ntest\n}}").render!('test' => 'worked')
+  end
+end