public void DeleteThrowsShoppingBasketException()
{
userBasketRepo.Setup(b => b.GetItem(It.IsAny <Func <IUserBasketItem, bool> >()))
.Returns((UserBasketItem)null);
var service = new ShoppingBasketService(userBasketRepo.Object, basketItemRepo.Object, discountRepo.Object);
Assert.Throws <ShoppingBasketException>(delegate { service.Delete(1, USER_ID); });
}