public void TestMethodRemoveLastChar() { //arrange PinController controller = new PinController(); CinemaViewModel model = new CinemaViewModel() { PinValue = "246" }; //act controller.TempData["model"] = model; controller.PinViewRemoveChar(); //assert model = (CinemaViewModel)controller.TempData["model"]; Assert.AreEqual(model.PinValue.Length, 2); }