public RedirectToRouteResult RemoveFromCart(Cart cart, int productID, string returnUrl)
 {
     log4net.Config.XmlConfigurator.Configure();
     Product product = repository.Products
         .FirstOrDefault(p => p.ProductID == productID);
     if (product != null)
     {
         cart.RemoveLine(product);
     }
     log.Info("Product delete from cart");
     return RedirectToAction("Index", new { returnUrl });
 }
        public void Can_Remove_Line()
        {
            Product p1 = new Product { ProductID = 1, Name = "P1" };
            Product p2 = new Product { ProductID = 2, Name = "P2" };
            Product p3 = new Product { ProductID = 3, Name = "P3" };

            Cart target = new Cart();

            target.AddItem(p1, 1);
            target.AddItem(p2, 3);
            target.AddItem(p3, 5);
            target.AddItem(p2, 1);

            target.RemoveLine(p2);

            Assert.AreEqual(target.Lines.Where(c => c.Product == p2).Count(), 0);
            Assert.AreEqual(target.Lines.Count(), 2);

        }