public async Task ValidationMappingDeparture_when_validate_pilot_OK_then_map() { var validator = new DepartureDTOValidator(); DepartureDTO correct = new DepartureDTO() { Id = 1, Crew = new CrewDTO(), Flight = new FlightDTO(), Plane = new PlaneDTO(), TimeOfDeparture = new System.DateTime(2018, 10, 10) }; DepartureDTO incorrect = new DepartureDTO() { Id = 2, Crew = new CrewDTO(), Plane = new PlaneDTO() }; bool correctRes = validator.Validate(correct).IsValid; Assert.True(correctRes); var mapped = _mapper.Map <DepartureDTO, Departure>(correct); if (correctRes) { await _service.Post(mapped); } bool incorrectRes = validator.Validate(incorrect).IsValid; Assert.False(incorrectRes); var mappedIncorrect = _mapper.Map <DepartureDTO, Departure>(incorrect); if (incorrectRes) { await _service.Post(mapped); } }