public IEnumerable <int> ApplyRule(Basket basket)
{
var count = basket.GetUnitLevels(new[] { unit }).Single();
basket.Remove(unit, count);
return(Enumerable.Repeat(unitPrice, count));
}
public IEnumerable <int> ApplyRule(Basket basket)
{
while (basket.GetUnitLevels(new[] { unitUnderOffer }).Single() >= requiredUnits)
{
basket.Remove(unitUnderOffer, requiredUnits);
yield return(offerPrice);
}
}
