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/block_unit_test.rb

@@ -0,0 +1,58 @@
+require 'test_helper'
+
+class BlockUnitTest < Test::Unit::TestCase
+  include Liquid
+
+  def test_blankspace
+    template = Liquid::Template.parse("  ")
+    assert_equal ["  "], template.root.nodelist
+  end
+
+  def test_variable_beginning
+    template = Liquid::Template.parse("{{funk}}  ")
+    assert_equal 2, template.root.nodelist.size
+    assert_equal Variable, template.root.nodelist[0].class
+    assert_equal String, template.root.nodelist[1].class
+  end
+
+  def test_variable_end
+    template = Liquid::Template.parse("  {{funk}}")
+    assert_equal 2, template.root.nodelist.size
+    assert_equal String, template.root.nodelist[0].class
+    assert_equal Variable, template.root.nodelist[1].class
+  end
+
+  def test_variable_middle
+    template = Liquid::Template.parse("  {{funk}}  ")
+    assert_equal 3, template.root.nodelist.size
+    assert_equal String, template.root.nodelist[0].class
+    assert_equal Variable, template.root.nodelist[1].class
+    assert_equal String, template.root.nodelist[2].class
+  end
+
+  def test_variable_many_embedded_fragments
+    template = Liquid::Template.parse("  {{funk}} {{so}} {{brother}} ")
+    assert_equal 7, template.root.nodelist.size
+    assert_equal [String, Variable, String, Variable, String, Variable, String],
+                 block_types(template.root.nodelist)
+  end
+
+  def test_with_block
+    template = Liquid::Template.parse("  {% comment %} {% endcomment %} ")
+    assert_equal [String, Comment, String], block_types(template.root.nodelist)
+    assert_equal 3, template.root.nodelist.size
+  end
+
+  def test_with_custom_tag
+    Liquid::Template.register_tag("testtag", Block)
+
+    assert_nothing_thrown do
+      template = Liquid::Template.parse( "{% testtag %} {% endtesttag %}")
+    end
+  end
+
+  private
+    def block_types(nodelist)
+      nodelist.collect { |node| node.class }
+    end
+end # VariableTest