public void PromotionWithCartsTests()
{
IPromotionServices _promotionServices = new NoPromotionServices();
_promotionServices.SetCart(_cartService);
Assert.Equal(245, _promotionServices.Price());
}
public void PromotionWithNoCartsTests()
{
IPromotionServices _promotionServices = new NoPromotionServices();
Assert.Equal(0, _promotionServices.Price());
}