public void AddTrip_ReturnsRedirectToAction()
        {
            var httpContextAccessor = TestHelperLibrary.SetUpHttpContextAccessor();
            var unitOfWork          = TestHelperLibrary.SetupUnitOfWork();
            var tempData            = new TempDataDictionary(httpContextAccessor.Object.HttpContext, Mock.Of <ITempDataProvider>());
            var controller          = new VacationController(unitOfWork.Object, httpContextAccessor.Object);

            controller.TempData = tempData;

            var trip = new Trip {
                Id              = 1,
                DestinationId   = 6,
                AccommodationId = 4,
                StartDate       = new DateTime(2020, 12, 20),
                EndDate         = new DateTime(2021, 1, 2)
            };

            controller.TempData["trip_dest"]  = trip.DestinationId;
            controller.TempData["trip_acc"]   = trip.AccommodationId;
            controller.TempData["trip_start"] = trip.StartDate;
            controller.TempData["trip_end"]   = trip.EndDate;
            var result = controller.AddTrip(new[] { 1, 2 }) as RedirectToActionResult;

            Assert.IsType <RedirectToActionResult>(result);
        }