public async void SetBasketItemWhenNotInBasket()
{
var userId = Guid.NewGuid();
var existingBasket = await manager.Create(userId);
var productId = Guid.NewGuid();
var item = await manager.SetItem(existingBasket.Id, productId, 1);
Assert.NotNull(item);
Assert.NotEqual(Guid.Empty, item.Id);
Assert.Equal(productId, item.ProductId);
Assert.Equal(1, item.Quantity);
}
