public async Task should_add_commodity_to_customer_shopping_cart_when_call_Add() { GivenShoppingCart(); var shoppingCart = await _shoppingCartService.AddCommodity(CustomerId, CreateShoppingCartCommodity(_bookCommodity, 5)); shoppingCart.Should().BeEquivalentTo(new ShoppingCart { CustomerId = CustomerId, ShoppingCartCommodities = new List <ShoppingCartCommodity> { CreateShoppingCartCommodity(_bookCommodity, 5) } }); }