public void Handle_WhenExceptionIsThrownHandlingRequest_PactFailureExceptionIsThrown() { var compareException = new PactFailureException("Something\r\n \t \\ failed"); var nancyContext = new NancyContext { Request = new Request("GET", "/Test", "HTTP") }; var handler = GetSubject(); _mockRequestMapper .When(x => x.Convert(Arg.Any <Request>())) .Do(x => { throw compareException; }); _mockResponseMapper.Convert(Arg.Any <ProviderServiceResponse>()) .Returns(new Response { StatusCode = HttpStatusCode.InternalServerError }); Assert.Throws <PactFailureException>(() => handler.Handle(nancyContext)); }