public void Features_Create() { var aFeature = new Item { Id = 0 }; // Set test Create method w/o parameters request.Setup(m => m.Post <Response <Item> >("features", new ItemRequest { Item = aFeature }, null)).Returns(new Response <Item> { Data = new Item { Id = 1234 } }); // Test Get method var result = featuresProxy.Create(aFeature); // Verify test Assert.IsNotNull(result); Assert.IsTrue(result.IsSuccessful); Assert.AreEqual(1234, result.Data.Id); }