public void Remove_ClinicCouldNotFound_Fail(int id) { // arrange var response = new Response <bool>() { IsSucceed = false, ErrorMessage = "Clinic could not found", Result = false }; _unitOfWork.Setup(x => x.ClinicRepository.GetById(It.IsAny <int>())).Returns((Clinic)null); // act var result = _clinicService.Remove(id); // assert Assert.IsFalse(result.IsSucceed); Assert.IsFalse(result.Result); Assert.AreEqual(response.ErrorMessage, result.ErrorMessage); }