public CheckoutSystem(IScannerListener checkoutTests, IItemRegister itemRegister, ISpecialOffers specialOffers)
{
_checkoutTests = checkoutTests;
this.itemRegister = itemRegister;
_specialOffers = specialOffers;
}
public PriceCalculator(IPrinter printer, ISpecialOffers specialOffers)
{
_printer = printer;
_specialOffers = specialOffers;
}