public void AddDogToTheShoppingCart_ShouldAddToDogListInShoppingCart() { var dog = CreateFakeDog(); _shoppingCartService.AddDogToTheShoppingCart(dog); _shoppingCartService.ShoppingCartDogList.Should().Contain(dog); _shoppingCartService.ShoppingCartDogList[0].Should().BeEquivalentTo(dog); _shoppingCartService.ShoppingCartDogList.Should().NotBeEmpty(); }