public void TilfoejeEnBilTilParkeringspladsen_Ved_Ankomst()
{
var regNr = "12345678";
var car = A.Fake <ICar>();
var parkingLot = A.Fake <IParkingLot>();
A.CallTo(() => car.RegistrationNumber).Returns(regNr);
A.CallTo(() => parkingLot.Cars).Returns(new List <ICar>
{
car
});
var sut = new ParkingLotService(parkingLot);
sut.Arrive(car);
Assert.Contains(parkingLot.Cars, a => a.RegistrationNumber == regNr);
}