public void Delete_Success_ReturnsARedirectToActionResut()
        {
            // Arrange
            var guestId   = 1;
            var testGuest = new GuestViewModel()
            {
                Id = guestId
            };
            var guestsRepo = new Mock <IGuestService>();

            guestsRepo.Setup(g => g.DeleteGuests(guestId));
            var controller = new GuestController(guestsRepo.Object);

            // Act
            var result = controller.DeleteConfirmed(guestId);

            // Assert
            var redirectToActionResult = result as RedirectToActionResult;

            Assert.AreEqual("Index", redirectToActionResult.ActionName);
        }