public void Update_Bed() { //arange FlightsService fs = new FlightsService(unitOfWork, mapper, validator); var expected = new Flight { Id = 1, FlightNumber = "QW11", DeparturePoint = "London", DepartureTime = Convert.ToDateTime("2018-07-13T08:22:56.6404304+03:00"), DestinationPoint = "Ukraine", ArrivalTime = Convert.ToDateTime("2018-07-13T08:22:56.6404304+03:00") + TimeSpan.FromHours(5) }; var fightDtoToTest = new FlightDto { Id = 1, FlightNumber = "QW", DeparturePoint = "London", DepartureTime = Convert.ToDateTime("2018-07-13T08:22:56.6404304+03:00"), DestinationPoint = "Ukraine", ArrivalTime = Convert.ToDateTime("2018-07-13T08:22:56.6404304+03:00") + TimeSpan.FromHours(5) }; //act fs.Update(fightDtoToTest); var actual = (unitOfWork.Set <Flight>() as FakeRpository <Flight>).updatedItem; //assert Assert.IsNull(actual); }