Patch Test::Unit::Assertion#assert on Ruby 1.8 to return true on success

Our Mocha `with do ... end` blocks fail otherwise.

test/test_helper.rb

@@ -32,6 +32,11 @@
 
 class Test::Unit::TestCase
 
+  def assert_block(message=nil)
+    raise Test::Unit::AssertionFailedError.new(message.to_s) if (! yield)
+    return true
+  end if defined?(RUBY_VERSION) && RUBY_VERSION < '1.9'
+
   def mock_response(body, code=200, headers={})
     Tire::HTTP::Response.new(body, code, headers)
   end

test/unit/rubyext_test.rb

@@ -55,6 +55,12 @@ class RubyCoreExtensionsTest < Test::Unit::TestCase
 
     end
 
+    context "Ruby Test::Unit" do
+      should "actually return true from assert..." do
+        assert_equal true, assert(true)
+      end
+    end
+
   end
 
 end