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/unit/module_ex_unit_test.rb

@@ -0,0 +1,87 @@
+require 'test_helper'
+
+class TestClassA
+  liquid_methods :allowedA, :chainedB
+  def allowedA
+    'allowedA'
+  end
+  def restrictedA
+    'restrictedA'
+  end
+  def chainedB
+    TestClassB.new
+  end
+end
+
+class TestClassB
+  liquid_methods :allowedB, :chainedC
+  def allowedB
+    'allowedB'
+  end
+  def chainedC
+    TestClassC.new
+  end
+end
+
+class TestClassC
+  liquid_methods :allowedC
+  def allowedC
+    'allowedC'
+  end
+end
+
+class TestClassC::LiquidDropClass
+  def another_allowedC
+    'another_allowedC'
+  end
+end
+
+class ModuleExUnitTest < Test::Unit::TestCase
+  include Liquid
+
+  def setup
+    @a = TestClassA.new
+    @b = TestClassB.new
+    @c = TestClassC.new
+  end
+
+  def test_should_create_LiquidDropClass
+    assert TestClassA::LiquidDropClass
+    assert TestClassB::LiquidDropClass
+    assert TestClassC::LiquidDropClass
+  end
+
+  def test_should_respond_to_liquid
+    assert @a.respond_to?(:to_liquid)
+    assert @b.respond_to?(:to_liquid)
+    assert @c.respond_to?(:to_liquid)
+  end
+
+  def test_should_return_LiquidDropClass_object
+    assert @a.to_liquid.is_a?(TestClassA::LiquidDropClass)
+    assert @b.to_liquid.is_a?(TestClassB::LiquidDropClass)
+    assert @c.to_liquid.is_a?(TestClassC::LiquidDropClass)
+  end
+
+  def test_should_respond_to_liquid_methods
+    assert @a.to_liquid.respond_to?(:allowedA)
+    assert @a.to_liquid.respond_to?(:chainedB)
+    assert @b.to_liquid.respond_to?(:allowedB)
+    assert @b.to_liquid.respond_to?(:chainedC)
+    assert @c.to_liquid.respond_to?(:allowedC)
+    assert @c.to_liquid.respond_to?(:another_allowedC)
+  end
+
+  def test_should_not_respond_to_restricted_methods
+    assert ! @a.to_liquid.respond_to?(:restricted)
+  end
+
+  def test_should_use_regular_objects_as_drops
+    assert_template_result 'allowedA', "{{ a.allowedA }}", 'a'=>@a
+    assert_template_result 'allowedB', "{{ a.chainedB.allowedB }}", 'a'=>@a
+    assert_template_result 'allowedC', "{{ a.chainedB.chainedC.allowedC }}", 'a'=>@a
+    assert_template_result 'another_allowedC', "{{ a.chainedB.chainedC.another_allowedC }}", 'a'=>@a
+    assert_template_result '', "{{ a.restricted }}", 'a'=>@a
+    assert_template_result '', "{{ a.unknown }}", 'a'=>@a
+  end
+end # ModuleExTest