public double Calculate()
{
double totalCost = 0;
double adjustedValue = 0;
foreach (Item item in Items)
{
totalCost += item.Accept(promotion);
}
if (promotion.GetType().Equals(typeof(Promotion1)))
{
int noOfCItems = 0;
double costOfCItem = 0.0;
int noOfDItems = 0;
double costOfDItem = 0.0;
if (Items.OfType <ItemC>().FirstOrDefault() != null)
{
noOfCItems = Items.OfType <ItemC>().FirstOrDefault().NoOfItems;
costOfCItem = Items.OfType <ItemC>().FirstOrDefault().Cost;
}
if (Items.OfType <ItemD>().FirstOrDefault() != null)
{
noOfDItems = Items.OfType <ItemD>().FirstOrDefault().NoOfItems;
costOfDItem = Items.OfType <ItemD>().FirstOrDefault().Cost;
}
if (noOfCItems > 0 && noOfDItems > 0)
{
if (noOfCItems == noOfDItems)
{
adjustedValue = noOfCItems * 5;
}
if (noOfCItems != noOfDItems)
{
adjustedValue = (noOfCItems > noOfDItems) ? ((noOfCItems - noOfDItems) * costOfCItem) : ((noOfDItems - noOfCItems) * costOfDItem);
}
}
}
return(totalCost - adjustedValue);
}
public void TestPromotionStarCard()
{
// arrange
string coupon = "STARCARD";
Type expectType = typeof(PromotionStarCard);
// act
PromotionFactory promoFactory = new PromotionFactory();
IPromotion promo = promoFactory.GetPromotionByCode(coupon);
Type actualType = promo.GetType();
// assert
Assert.AreEqual(expectType, actualType);
}
public void TestPromotionDefault()
{
// arrange
string coupon = "NONE";
Type expectType = typeof(DefaultPromotion);
// act
PromotionFactory promoFactory = new PromotionFactory();
IPromotion promo = promoFactory.GetPromotionByCode(coupon);
Type actualType = promo.GetType();
// assert
Assert.AreEqual(expectType, actualType);
}
public void TestDiscount10Percent()
{
// arrange
string coupon = "DIS10";
Type expectType = typeof(PromotionDis10);
// act
PromotionFactory promoFactory = new PromotionFactory();
IPromotion promo = promoFactory.GetPromotionByCode(coupon);
Type actualType = promo.GetType();
// assert
Assert.AreEqual(expectType, actualType);
}