public async Task GivenADifferentFakeUrlEndpoint_GetSomeFooDataAsync_ThrowsAnException()
        {
            // Arrange.
            const string responseData    = "{ \"Id\":69, \"Name\":\"Jane\" }";
            var          messageResponse = FakeHttpMessageHandler.GetStringHttpResponseMessage(responseData);

            var options = new HttpMessageOptions
            {
                RequestUri          = "http://this.is.not.the.correct.endpoint",
                HttpResponseMessage = messageResponse
            };

            var messageHandler = new FakeHttpMessageHandler(options);

            var myService = new MyService(messageHandler);

            // Act.
            // NOTE: network traffic will not leave your computer because you've faked the response, above.
            var result = await Should.ThrowAsync <InvalidOperationException>(myService.GetSomeFooDataAsync());

            // Assert.
            result.Message.ShouldStartWith("No HttpResponseMessage found");
        }