public void ExitTheParking_ShouldReturnCar(string registrationNumber) { //Arrange Car car = new Car() { Id = 1, EntranceTime = DateTime.Now, ExitTime = DateTime.Now, RegistrationNumber = registrationNumber }; _parkingRepositoryMock.Setup(x => x.ExitTheParking(registrationNumber)).Returns(Task.FromResult(car)); //Act Car carExpected = _parkingService.ExitTheParking(registrationNumber); //Assert Assert.Equal(registrationNumber, carExpected.RegistrationNumber); }