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/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