public void AddElectricCar_ShouldBeCorrect()
{
CarRepository _electricCar = new CarRepository();
TypeOfCar electric = new TypeOfCar();
TypeOfCar electricTwo = new TypeOfCar();
_electricCar.AddElectricCar(electric);
_electricCar.AddElectricCar(electricTwo);
int actual = _electricCar.GetElectricCars().Count;
int expected = 2;
Assert.AreEqual(expected, actual);
}