public async Task It_writes_success_for_add_to_console()
{
var quantity = 6;
var name = "Mountain Dew";
var shoppingList = new ShoppingList();
var console = new TestConsole();
await shoppingList.AddItemsAsync(console, name, quantity);
console.Out.ToString().Should().Be($"Successfully added {quantity} '{name}' to the shopping list: {shoppingList.ListName}\n");
}