Updated to svn tags/tracks-1.6

vendor/plugins/unobtrusive_javascript/test/lib/ptk/suite/difference.rb

@@ -0,0 +1,23 @@
+class Test::Unit::TestCase
+  
+  # http://project.ioni.st/post/217#post-217
+  #
+  #  def test_new_publication
+  #    assert_difference(Publication, :count) do
+  #      post :create, :publication => {...}
+  #      # ...
+  #    end
+  #  end
+  #
+  # modified by mabs29 to include arguments
+  def assert_difference(object, method = nil, difference = 1, *args)
+    initial_value = object.send(method, *args)
+    yield
+    assert_equal initial_value + difference, object.send(method, *args), "#{object}##{method}"
+  end
+
+  def assert_no_difference(object, method, *args, &block)
+    assert_difference object, method, 0, *args, &block
+  end
+
+end