public void Test_UpdateAuto()
{
AutoReservationBusinessComponent arvc = new AutoReservationBusinessComponent();
Auto original = arvc.GetAllAutos()[0];
Auto modified = arvc.GetAllAutos()[0];
modified.Marke = "Skoda";
arvc.UpdateAuto(original, modified);
Auto newCar = arvc.GetAllAutos()[0];
Assert.AreEqual("Skoda", newCar.Marke);
}