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);
 }