public void TotalCostTest_promotionAvailable_returnsPromotionCostCalculation() {
LineItem lineItem = new LineItem(new Item("Apple"));
lineItem.PricePerUnit = 1.5;
lineItem.Quantity = 2;
Promotion promotion = new QuantityPricePromotion(new Item("Apple"), "[email protected]");
lineItem.Promotion = promotion;
Assert.AreEqual(promotion.GetPromotionAdjustedTotalCost(lineItem), lineItem.TotalCost);
}
public void QuantityPricePromotionConstructorTest_validFormula_returnsValidPromotion() {
QuantityPricePromotion promotion = new QuantityPricePromotion(GetTestItem(), "[email protected]");
Assert.AreEqual(3, promotion.MinimumNumberItemsForPromotion);
Assert.AreEqual(1.0, promotion.PromotionPrice);
}
public void GetPromotionAdjustedTotalCostTest_withMoreThanSetAmount_returnsPromotionCostAndRegularCost() {
Item item = GetTestItem();
LineItem lineItem = GetTestLineItem(item, 4, 3.00);
QuantityPricePromotion promotion = new QuantityPricePromotion(item, "[email protected]");
double expectedCost = 1.00 + lineItem.PricePerUnit;
Assert.AreEqual(expectedCost, promotion.GetPromotionAdjustedTotalCost(lineItem));
}
public void GetPromotionAdjustedTotalCostTest_withNullLineItem_returnsZero() {
QuantityPricePromotion promotion = new QuantityPricePromotion(GetTestItem(), "[email protected]");
Assert.AreEqual(0, promotion.GetPromotionAdjustedTotalCost(null));
}
public void GetPromotionAdjustedTotalCostTest_withEqualToSetAmount_returnsPromotionCost() {
Item item = GetTestItem();
LineItem lineItem = GetTestLineItem(item, 3, 3.00);
QuantityPricePromotion promotion = new QuantityPricePromotion(item, "[email protected]");
double expectedCost = 1.00;
Assert.AreEqual(expectedCost, promotion.GetPromotionAdjustedTotalCost(lineItem));
}