public void TestFetchResponse()
        {
            var twilioRestClient = Substitute.For <ITwilioRestClient>();

            twilioRestClient.AccountSid.Returns("ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX");
            twilioRestClient.Request(Arg.Any <Request>())
            .Returns(new Response(
                         System.Net.HttpStatusCode.OK,
                         "{\"friendly_name\": \"AT&T\",\"iso_country\": \"US\",\"identifiers\": [{\"mcc\": \"310\",\"mnc\": \"410\"}],\"sid\": \"HWaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\",\"url\": \"https://supersim.twilio.com/v1/Networks/HWaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\"}"
                         ));

            var response = NetworkResource.Fetch("HWXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", client: twilioRestClient);

            Assert.NotNull(response);
        }
        public void TestFetchRequest()
        {
            var twilioRestClient = Substitute.For <ITwilioRestClient>();
            var request          = new Request(
                HttpMethod.Get,
                Twilio.Rest.Domain.Supersim,
                "/v1/Networks/HWXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
                ""
                );

            twilioRestClient.Request(request).Throws(new ApiException("Server Error, no content"));

            try
            {
                NetworkResource.Fetch("HWXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", client: twilioRestClient);
                Assert.Fail("Expected TwilioException to be thrown for 500");
            }
            catch (ApiException) {}
            twilioRestClient.Received().Request(request);
        }