# File lib/action_dispatch/testing/assertions/response.rb, line 33
      def assert_response(type, message = nil)
        validate_request!

        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 == Rack::Utils::SYMBOL_TO_STATUS_CODE[type]
          assert_block("") { true } # to count the assertion
        else
          assert_block(build_message(message, "Expected response to be a <?>, but was <?>", type, @response.response_code)) { false }
        end
      end