public void Should_return_valid_NancyResponse_containing_the_message_and_code_corresponding_to_the_requested_error() { // Given var errorService = new ErrorService(); var formatter = new DefaultResponseFormatter(A.Dummy <IRootPathProvider>(), A.Dummy <NancyContext>(), A.Dummy <IEnumerable <ISerializer> >()); var error = ErrorCode.UserNameTaken; // When var response = errorService.Generate(formatter, error); // Then response.ShouldNotBe(null); response.StatusCode.ShouldBe(HttpStatusCode.BadRequest); var contents = response.GetContents(); ((object)contents).ShouldNotBe(null); ((int)contents.ErrorCode).ShouldBe((int)error); ((string)contents.ErrorMessage).ShouldBe("The UserName has already been taken"); }