# File lib/action_controller/assertions/response_assertions.rb, line 88
      def assert_template(expected = nil, message=nil)
        clean_backtrace do
          rendered = @response.rendered_template.to_s
          msg = build_message(message, "expecting <?> but rendering with <?>", expected, rendered)
          assert_block(msg) do
            if expected.nil?
              @response.rendered_template.blank?
            else
              rendered.to_s.match(expected)
            end
          end
        end
      end