public void Adding_Product_To_Cart_Goes_To_Cart_Screen()
 {
     // Arrange - create the mock repository
     Mock<IProductRepository> mock = new Mock<IProductRepository>();
     mock.Setup(m => m.Products).Returns(new Product[]
     {
         new Product {ProductID = 1, Name = "P1", Category = "Apples"},
     }.AsQueryable());
     // Arrange - create a Cart
     Cart cart = new Cart();
     // Arrange - create the controller
     CartController target = new CartController(mock.Object, null);
     // Act - add a product to the cart
     RedirectToRouteResult result = target.AddToCart(cart, 2, "myUrl");
     // Assert
     Assert.AreEqual(result.RouteValues["action"], "Index");
     Assert.AreEqual(result.RouteValues["returnUrl"], "myUrl");
 }
 public void Can_Add_To_Cart()
 {
     // Arrange - create the mock repository
     Mock<IProductRepository> mock = new Mock<IProductRepository>();
     mock.Setup(m => m.Products).Returns(new Product[]
         {
             new Product {ProductID = 1, Name = "P1", Category = "Apples"},
         }.AsQueryable());
     // Arrange - create a Cart
     Cart cart = new Cart();
     // Arrange - create the controller
     CartController target = new CartController(mock.Object, null);
     // Act - add a product to the cart
     target.AddToCart(cart, 1, null);
     // Assert
     Assert.AreEqual(cart.Lines.Count(), 1);
     Assert.AreEqual(cart.Lines.ToArray()[0].Product.ProductID, 1);
 }