public void CreateShoppingCart_WhenShoppingCartIsCalled()
        {
            var factory = new CosmeticsFactory();

            var shoppingcart = factory.ShoppingCart();

            Assert.IsInstanceOf(typeof(ShoppingCart), shoppingcart);
        }
        public void CreateShoppingCart_ShouldInitialiseCorrectly()
        {
            var shoppingCart = factory.ShoppingCart();

            Assert.AreEqual("ShoppingCart", shoppingCart.GetType().Name);
        }