protected virtual AmountBasedReward GetBestAmountReward(decimal currentAmount, int quantity, IEnumerable <AmountBasedReward> reward)
{
AmountBasedReward retVal = null;
var maxAbsoluteReward = reward
.Where(y => y.AmountType == RewardAmountType.Absolute)
.OrderByDescending(y => y.GetRewardAmount(currentAmount, quantity)).FirstOrDefault();
var maxRelativeReward = reward
.Where(y => y.AmountType == RewardAmountType.Relative)
.OrderByDescending(y => y.GetRewardAmount(currentAmount, quantity)).FirstOrDefault();
var absDiscountAmount = maxAbsoluteReward != null?maxAbsoluteReward.GetRewardAmount(currentAmount, quantity) : 0;
var relDiscountAmount = maxRelativeReward != null?currentAmount *maxRelativeReward.GetRewardAmount(currentAmount, quantity) : 0;
if (maxAbsoluteReward != null && maxRelativeReward != null)
{
retVal = absDiscountAmount > relDiscountAmount ? maxAbsoluteReward : maxRelativeReward;
}
else if (maxAbsoluteReward != null)
{
retVal = maxAbsoluteReward;
}
else if (maxRelativeReward != null)
{
retVal = maxRelativeReward;
}
return(retVal);
}
private static AmountBasedReward EvaluateBestAmountReward(decimal currentAmount, AmountBasedReward[] promoRewards)
{
AmountBasedReward retVal = null;
var maxAbsoluteReward = promoRewards
.Where(y => y.AmountType == RewardAmountType.Absolute)
.OrderByDescending(y => y.Amount).FirstOrDefault();
var maxRelativeReward = promoRewards
.Where(y => y.AmountType == RewardAmountType.Relative)
.OrderByDescending(y => y.Amount).FirstOrDefault();
var absDiscountAmount = maxAbsoluteReward != null ? maxAbsoluteReward.Amount : 0;
var relDiscountAmount = maxRelativeReward != null ? currentAmount * maxRelativeReward.Amount : 0;
if (maxAbsoluteReward != null && maxRelativeReward != null)
{
if (absDiscountAmount > relDiscountAmount)
{
retVal = maxAbsoluteReward;
}
else
{
retVal = maxRelativeReward;
}
}
else if (maxAbsoluteReward != null)
{
retVal = maxAbsoluteReward;
}
else if (maxRelativeReward != null)
{
retVal = maxRelativeReward;
}
return(retVal);
}
public virtual void TestGetRewardAmounts(AmountBasedReward reward, decimal price, int qty, decimal expectedResult)
{
Assert.Equal(reward.GetRewardAmount(price, qty), expectedResult);
}
