public void GivenListOfOranges_WhenThereIs3For2Offer_AppliesCorrectyTheDiscount()
{
//arrange
var listOfItems = TestVariables.GetFakeListOfItems();
Decimal totalOrangePriceInList = listOfItems.Where(x => x.ItemName.ToLower() == "orange").Sum(y => y.ItemPrice);
var orangeDiscountPercent = Decimal.Round(2M / 3M, 2);
var discountedPrice = Decimal.Round(totalOrangePriceInList * orangeDiscountPercent, 2);
//I know there are 3 oranges
var expectedResult = Decimal.Round((3 * Utility.orangeCost) * orangeDiscountPercent, 2);
Assert.Equal(expectedResult, discountedPrice);
}
public void GivenListOfApples_WhenThereIs2For1Offer_AppliesCorrectyTheDiscount()
{
//arrange
var listOfItems = TestVariables.GetFakeListOfItems();
Decimal totalApplePriceInList = listOfItems.Where(x => x.ItemName.ToLower() == "apple").Sum(y => y.ItemPrice);
var appleDiscountPercent = 0.5M;
var discountedPrice = Decimal.Round(totalApplePriceInList * appleDiscountPercent, 2);
//I know there are 2 apples
var expectedResult = (2 * Utility.appleCost) * appleDiscountPercent;
Assert.Equal(expectedResult, discountedPrice);
}
public void GivenListOfItems_WhenItemssAreValid_ReturnsTotalCost()
{
//arrange
var listOfItems = TestVariables.GetFakeListOfItems();
Decimal totalApplePriceInList = listOfItems.Where(x => x.ItemName.ToLower() == "apple").Sum(y => y.ItemPrice);
Decimal totalOrangePriceInList = listOfItems.Where(x => x.ItemName.ToLower() == "orange").Sum(y => y.ItemPrice);
var totalPriceInLIst = listOfItems.Sum(x => x.ItemPrice);
var sut = new Checkout();
//add
//act
var result = sut.CalculateTotalPrice(listOfItems);
//Assert
Assert.Equal((Decimal)totalPriceInLIst, (Decimal)result);
}
public void GivenListOfItems_WhenItemssAreValid_ReturnsTotalCostWithDiscounts()
{
//arrange
var listOfItems = TestVariables.GetFakeListOfItems();
Decimal totalApplePriceInList = listOfItems.Where(x => x.ItemName.ToLower() == "apple").Sum(y => y.ItemPrice);
Decimal totalOrangePriceInList = listOfItems.Where(x => x.ItemName.ToLower() == "orange").Sum(y => y.ItemPrice);
var appleDiscountPercent = 0.5M;
var orangeDiscountPercent = 2M / 3M;
var totalPriceInLIst = listOfItems.Sum(x => x.ItemPrice);
var totalDiscountedPrice = totalPriceInLIst - ((totalApplePriceInList * appleDiscountPercent) + (totalOrangePriceInList * orangeDiscountPercent));
var sut = new Checkout();
//act
var result = Decimal.Round(sut.CalculateTotalPriceAndApplyDiscounts(listOfItems), 2);
//Assert
Assert.Equal(Decimal.Round(totalDiscountedPrice, 2), result);
}