public void AddGasCar_ShouldBeCorrect() { CarRepository _gasCar = new CarRepository(); TypeOfCar gasCar = new TypeOfCar(); TypeOfCar garCarTwo = new TypeOfCar(); _gasCar.AddGasCar(gasCar); _gasCar.AddGasCar(garCarTwo); int actual = _gasCar.GasCars().Count; int expected = 2; Assert.AreEqual(expected, actual); }