public void Emails_Create() { var aEmail = new Email { Id = 0 }; // Set test Create method w/o parameters request.Setup(m => m.Post <Response <Email> >("emails", aEmail, null)).Returns(new Response <Email> { Data = new Email { Id = 1234 } }); // Test Get method var result = emailsProxy.Create(aEmail); // Verify test Assert.IsNotNull(result); Assert.IsTrue(result.IsSuccessful); Assert.AreEqual(1234, result.Data.Id); }