public void SetProductCupon(IProduct product, IProductCupon cupon)
{
if (product == null)
{
throw new ArgumentNullException(nameof(product));
}
var lastUsedCuppon = product.Cupon;
_commandManager
.ExecuteCommand(
() => product.SetCupon(cupon),
() => product.SetCupon(lastUsedCuppon));
}
public void SetCupon(IProductCupon cupon)
{
Cupon = cupon;
}
