public void AddProductToCart_AddsNewShoppingCartItem()
        {
            var target = new ShoppingCartRepository();
            var preAddcart = target.GetById("TestUser");
            Assert.AreEqual(0, preAddcart.ShoppingCartItems.Count);

            target.AddProductToCart("TestUser", new Product() { ProductNumber ="BB-7421"});

            var postAddcart = target.GetById("TestUser");
            Assert.IsNotNull(postAddcart);
            Assert.AreEqual(1, postAddcart.ShoppingCartItems.Count);
            Assert.AreEqual("BB-7421", postAddcart.ShoppingCartItems.First().Product.ProductNumber);
        }
        public void DeleteCart_DeletesCart_AndReturnsTrue()
        {
            var target = new ShoppingCartRepository();
            target.AddProductToCart("TestUser", new Product { ProductNumber = "BB-7421" });

            var cart = target.GetById("TestUser");
            Assert.AreEqual(1, cart.ShoppingCartItems.Count);

            var success = target.Delete("TestUser");

            Assert.IsTrue(success);

            var emptyCart = target.GetById("TestUser");
            Assert.AreEqual(0, emptyCart.ShoppingCartItems.Count);
        }
 public void AddProductToCart_AddsNewShoppingCartItemToExistingCart()
 {
     var target = new ShoppingCartRepository();
     target.AddProductToCart("TestUser", new Product() { ProductNumber ="BB-7421"});
     target.AddProductToCart("TestUser", new Product() { ProductNumber = "BB-8107" });
     var cart = target.GetById("TestUser");
     Assert.IsNotNull(cart);
     Assert.AreEqual(2, cart.ShoppingCartItems.Count);
     Assert.IsNotNull(cart.ShoppingCartItems.First(item => item.Product.ProductNumber == "BB-7421"));
     Assert.IsNotNull(cart.ShoppingCartItems.First(item => item.Product.ProductNumber == "BB-8107"));
 }
        public void AddProductToCart_AddsNewShoppingCartItemToExistingCart_WithSameProduct()
        {
            var target = new ShoppingCartRepository();
            
            target.AddProductToCart("TestUser", new Product { ProductNumber = "123" });
            target.AddProductToCart("TestUser", new Product { ProductNumber = "123" });

            var cart = target.GetById("TestUser");
            Assert.IsNotNull(cart);
            Assert.AreEqual(1, cart.ShoppingCartItems.Count);

            var items = cart.ShoppingCartItems.Where(item => item.Product.ProductNumber == "123");
            Assert.AreEqual(1, items.Count());
            Assert.AreEqual(2, items.First().Quantity);
        }