public async Task ValidationMappingPlane_when_validate_pilot_OK_then_map() { var validator = new PlaneDTOValidator(); PlaneDTO correct = new PlaneDTO() { Id = 1, PlaneType = new PlaneTypeDTO() { Id = 5, Model = "model" } }; PlaneDTO incorrect = new PlaneDTO() { Id = 2, ReleaseDate = new System.DateTime(2012, 10, 10) }; bool correctRes = validator.Validate(correct).IsValid; Assert.True(correctRes); var mapped = _mapper.Map <PlaneDTO, Plane>(correct); if (correctRes) { await _service.Post(mapped); } bool incorrectRes = validator.Validate(incorrect).IsValid; Assert.False(incorrectRes); var mappedIncorrect = _mapper.Map <PlaneDTO, Plane>(incorrect); if (incorrectRes) { await _service.Post(mapped); } }