public void CalculateCost_WhenAnOrderIsApplicableForMediumParcelMania_Every3rdMediumParcelIsFreeAndCostIsReturned()
{
//Arrange
var parcels = new List <Parcel>()
{
new Parcel(25, 3), //$8
new Parcel(25, 4), //$10
new Parcel(25, 3) //$8
};
var parcelOrder = new ParcelOrder(parcels);
//Act
var parcelCost = parcelOrder.CalculateCost();
//Assert
Assert.Equal(26, parcelCost.Cost);
Assert.Equal(-8, parcelCost.Discount);
}
public void CalculateCost_WhenAnOrderIsApplicableForSmallParcelMania_Every4thSmallParcelIsFreeAndCostIsReturned()
{
//Arrange
var parcels = new List <Parcel>()
{
new Parcel(5, 1), //$3
new Parcel(5, 2), //$5
new Parcel(5, 1), //$3
new Parcel(5, 2), //$3
};
var parcelOrder = new ParcelOrder(parcels);
//Act
var parcelCost = parcelOrder.CalculateCost();
//Assert
Assert.Equal(14, parcelCost.Cost);
Assert.Equal(-3, parcelCost.Discount);
}
public void CalculateCost_WhenAnOrderIsApplicableForMixedParcelMania_Every5thParcelIsFreeAndCostIsReturned()
{
//Arrange
var parcels = new List <Parcel>()
{
new Parcel(5, 1), //$3
new Parcel(25, 3), //$8
new Parcel(75, 6), //$15
new Parcel(5, 1), //$3
new Parcel(25, 3) //$8
};
var parcelOrder = new ParcelOrder(parcels);
//Act
var parcelCost = parcelOrder.CalculateCost();
//Assert
Assert.Equal(37, parcelCost.Cost);
Assert.Equal(-3, parcelCost.Discount);
}
public void CalculateCost_WhenAnOrderIsApplicableForMultipleDiscounts_BestPriceDiscountsAreSelectedAndCostIsReturned()
{
//Arrange
var parcels = new List <Parcel>()
{
new Parcel(5, 1), //$3
new Parcel(5, 1), //$3
new Parcel(5, 1), //$3
new Parcel(5, 1), //$3
new Parcel(25, 3), //$8
new Parcel(25, 3), //$8
new Parcel(25, 3) //$8
};
var parcelOrder = new ParcelOrder(parcels);
//Act
var parcelCost = parcelOrder.CalculateCost();
//Assert
Assert.Equal(36, parcelCost.Cost);
Assert.Equal(-11, parcelCost.Discount);
}