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);
}