public void ProcessCoupon(ICoupon coupon, IBasket basket, IBasketCoupon basketCoupon)
{
if (coupon.MinSpend < basket.BasketTotal())
{
basketCoupon.Value = coupon.Value * (basket.BasketTotal() / 100);
basketCoupon.CouponCode = coupon.CouponCode;
basketCoupon.CouponDescription = coupon.CouponDescription;
basketCoupon.CouponId = coupon.CouponId;
basket.AddBasketCoupon(basketCoupon);
}
} //end ProcessCoupon
public void AddBasketCoupon(IBasketCoupon coupon)
{
_basketCoupons.Add((BasketCoupon)coupon);
}