public async void Update_NotFound() { PenControllerMockFacade mock = new PenControllerMockFacade(); var mockResult = new Mock <UpdateResponse <ApiPenResponseModel> >(); mockResult.SetupGet(x => x.Success).Returns(false); mock.ServiceMock.Setup(x => x.Update(It.IsAny <int>(), It.IsAny <ApiPenRequestModel>())).Returns(Task.FromResult <UpdateResponse <ApiPenResponseModel> >(mockResult.Object)); mock.ServiceMock.Setup(x => x.Get(It.IsAny <int>())).Returns(Task.FromResult <ApiPenResponseModel>(null)); PenController controller = new PenController(mock.ApiSettingsMoc.Object, mock.LoggerMock.Object, mock.TransactionCoordinatorMock.Object, mock.ServiceMock.Object, new ApiPenModelMapper()); controller.ControllerContext = new ControllerContext(); controller.ControllerContext.HttpContext = new DefaultHttpContext(); IActionResult response = await controller.Update(default(int), new ApiPenRequestModel()); response.Should().BeOfType <StatusCodeResult>(); (response as StatusCodeResult).StatusCode.Should().Be((int)HttpStatusCode.NotFound); mock.ServiceMock.Verify(x => x.Get(It.IsAny <int>())); }