public async Task Should_InvokeWishListRepositoryDeleteAsync_Once()
        {
            var wish = new Wishlist();

            wish.AddItem(1);
            wish.AddItem(2);
            _mockWishlistRepo.Setup(x => x.GetByIdAsync(It.IsAny <int>()))
            .ReturnsAsync(wish);
            var wishListService = new WishlistService(_mockWishlistRepo.Object, null);

            await wishListService.DeleteWishlistAsync(It.IsAny <int>());

            _mockWishlistRepo.Verify(x => x.DeleteAsync(It.IsAny <Wishlist>()), Times.Once);
        }