public async Task DbSetPostAsyncResourceAttributeNull()
        {
            //Arrange
            var mockRestClient = new Mock<IRestClient>();

            var dbSet = new DbSet<MockDbsetContact>(mockRestClient.Object);

            //Act
            await dbSet.PostAsync(new MockDbsetContact());

            //Assert - throws
        }
        public async Task DbSetPostAsyncTest()
        {
            //Arrange
            var mockRestResponse = new Mock<IRestResponse>();
            mockRestResponse.SetupGet(o => o.ResponseStatus).Returns(ResponseStatus.Completed);
            mockRestResponse.SetupGet(o => o.StatusCode).Returns(HttpStatusCode.OK);
            mockRestResponse.SetupGet(o => o.Content).Returns(@"{
                  ""contactId"": ""48620"",
                  ""id"": ""10002"",
                  ""fieldValues"": [
                    {
                      ""id"": ""824"",
                      ""value"": ""transxId12321321321321""
                    }
                  ],
                  ""name"": ""Bob Tester"",
                  ""uri"": ""/data/customObject""
                }
            ");

            var mockRestClient = new Mock<IRestClient>();
            mockRestClient.Setup(o => o.ExecuteTaskAsync(It.IsAny<IRestRequest>())).ReturnsAsync(mockRestResponse.Object);

            var dbSet = new DbSet<MockDbsetWithDataContact>(mockRestClient.Object);

            var mockContact = new MockDbsetWithDataContact
            {
                Name = "Bob Tester",
                ContactId = 48620,
                CustomField = "Custuom Rims",
                Uri = "/contact/id"
            };


            //Act
            var contact = await dbSet.PostAsync(mockContact);

            //Assert
            Assert.AreEqual(48620, contact.ContactId);
        }