AdventureWorks.WebServices.Tests.Controllers.ShoppingCartControllerFixture.MergeShoppingCarts_ReturnsFalse_WhenNothingToMerge C# (CSharp) Method

        public void MergeShoppingCarts_ReturnsFalse_WhenNothingToMerge()
        {
            var deleteCartCalled = false;
            var shoppingCartRepository = new MockShoppingCartRepository();
            shoppingCartRepository.GetByIdDelegate = userId =>
                                                         {
                                                             switch (userId)
                                                             {
                                                                 case "oldId":
                                                                     return
                                                                         new ShoppingCart(
                                                                             new Collection<ShoppingCartItem>
                                                                                 {new ShoppingCartItem {Id = "item1", Product = new Product()}});
                                                                 case "newId":
                                                                     return
                                                                         new ShoppingCart(
                                                                             new Collection<ShoppingCartItem>());
                                                                 default:
                                                                     return null;
                                                             }
                                                         };
            shoppingCartRepository.DeleteDelegate = shoppingCartId =>
            {
                Assert.AreEqual("oldId", shoppingCartId);
                deleteCartCalled = true;
                return true;
            };
            var target = new ShoppingCartController(shoppingCartRepository, new MockProductRepository());

            Assert.IsFalse(target.MergeShoppingCarts("newId", "oldId"));
            Assert.IsTrue(deleteCartCalled);

        }
    }