public void TestMethodAddNumber() { //arrange PinController controller = new PinController(); CinemaViewModel model = new CinemaViewModel() { PinValue = "2" }; //act controller.TempData["model"] = model; controller.PinViewAddchar("2"); //assert model = (CinemaViewModel)controller.TempData["model"]; Assert.AreEqual(2, model.PinValue.Length); }