public void Accept_BusinessTripIdInStorage_ReturnsStatusChangedSuccessfullyView()
        {
            var businessTripRepository = new BusinessTripsRepository();

            var userRegistrationModel = new UserRegistrationModel();

            userRegistrationModel.Save();

            var businessTripModel = new BusinessTripModel
            {
                User         = new UserModel(userRegistrationModel.Id),
                StartingDate = DateTime.Now,
                EndingDate   = DateTime.Now
            };

            businessTripRepository.Add(businessTripModel);
            businessTripRepository.SaveChanges();

            var result = controller.Accept(businessTripModel.Id) as ViewResult;

            Assert.IsNotNull(result);
            Assert.AreEqual("StatusChangedSuccessfully", result.ViewName);
        }