# File lib/action_controller/assertions/response_assertions.rb, line 24
      def assert_response(type, message = nil)
        clean_backtrace do
          if [ :success, :missing, :redirect, :error ].include?(type) && @response.send("#{type}?")
            assert_block("") { true } # to count the assertion
          elsif type.is_a?(Fixnum) && @response.response_code == type
            assert_block("") { true } # to count the assertion
          elsif type.is_a?(Symbol) && @response.response_code == ActionController::StatusCodes::SYMBOL_TO_STATUS_CODE[type]
            assert_block("") { true } # to count the assertion
          else
            if @response.error?
              exception = @response.template.instance_variable_get(:@exception)
              exception_message = exception && exception.message
              assert_block(build_message(message, "Expected response to be a <?>, but was <?>\n<?>", type, @response.response_code, exception_message.to_s)) { false }
            else
              assert_block(build_message(message, "Expected response to be a <?>, but was <?>", type, @response.response_code)) { false }
            end
          end
        end
      end