public void ItGivesDiscountForExample()
{
var validator = new HarryPotterDiscountCalculator();
// 2 copies of the first book
var bk1Stack = new Stack <IStockItem>();
bk1Stack.Push(new Book1());
bk1Stack.Push(new Book1());
var kvp = new KeyValuePair <string, Stack <IStockItem> >(new Book1().ProductCode, bk1Stack);
validator.ConsiderItemForDiscount(kvp);
// 2 copies of the second book
var bk2Stack = new Stack <IStockItem>();
bk2Stack.Push(new Book2());
bk2Stack.Push(new Book2());
var kvp2 = new KeyValuePair <string, Stack <IStockItem> >(new Book2().ProductCode, bk2Stack);
validator.ConsiderItemForDiscount(kvp2);
// 2 copies of the third book
var bk3Stack = new Stack <IStockItem>();
bk3Stack.Push(new Book3());
bk3Stack.Push(new Book3());
var kvp3 = new KeyValuePair <string, Stack <IStockItem> >(new Book3().ProductCode, bk3Stack);
validator.ConsiderItemForDiscount(kvp3);
// 1 copy of the fourth book
var bk4Stack = new Stack <IStockItem>();
bk4Stack.Push(new Book4());
var kvp4 = new KeyValuePair <string, Stack <IStockItem> >(new Book4().ProductCode, bk4Stack);
validator.ConsiderItemForDiscount(kvp4);
// 1 copy of the fifth book
var bk5Stack = new Stack <IStockItem>();
bk5Stack.Push(new Book5());
var kvp5 = new KeyValuePair <string, Stack <IStockItem> >(new Book5().ProductCode, bk5Stack);
validator.ConsiderItemForDiscount(kvp5);
// Total cost before discount is �
// Total discount is �.40
Assert.AreEqual(12.40, validator.TotalDiscount);
}
public void ItDoesntGiveDiscountForSingleItem()
{
var validator = new HarryPotterDiscountCalculator();
var newStack = new Stack <IStockItem>();
newStack.Push(new Book1());
var kvp = new KeyValuePair <string, Stack <IStockItem> >(new Book1().ProductCode, newStack);
validator.ConsiderItemForDiscount(kvp);
Assert.AreEqual(0.0, validator.TotalDiscount);
}
public void ItDoesntGivesDiscountFor2SameBooks()
{
var validator = new HarryPotterDiscountCalculator();
var bk1Stack = new Stack <IStockItem>();
bk1Stack.Push(new Book1());
bk1Stack.Push(new Book1());
var kvp = new KeyValuePair <string, Stack <IStockItem> >(new Book1().ProductCode, bk1Stack);
validator.ConsiderItemForDiscount(kvp);
// 2 * �= � * 0 = � 0 discount
Assert.AreEqual(0, validator.TotalDiscount);
}
public void ItGivesDiscountForNonSequentialBooksBooks()
{
var validator = new HarryPotterDiscountCalculator();
var bk1Stack = new Stack <IStockItem>();
bk1Stack.Push(new Book1());
var kvp = new KeyValuePair <string, Stack <IStockItem> >(new Book1().ProductCode, bk1Stack);
validator.ConsiderItemForDiscount(kvp);
var bk3Stack = new Stack <IStockItem>();
bk3Stack.Push(new Book3());
var kvp3 = new KeyValuePair <string, Stack <IStockItem> >(new Book3().ProductCode, bk3Stack);
validator.ConsiderItemForDiscount(kvp3);
// 2 * �= � * 0.05 = � 0.8 discount
Assert.AreEqual(0.8, validator.TotalDiscount);
}
public void ItGivesDiscountMultipleTimes()
{
var validator = new HarryPotterDiscountCalculator();
var bk1Stack = new Stack <IStockItem>();
bk1Stack.Push(new Book1());
bk1Stack.Push(new Book1());
var kvp = new KeyValuePair <string, Stack <IStockItem> >(new Book1().ProductCode, bk1Stack);
validator.ConsiderItemForDiscount(kvp);
var bk2Stack = new Stack <IStockItem>();
bk2Stack.Push(new Book2());
bk2Stack.Push(new Book2());
var kvp2 = new KeyValuePair <string, Stack <IStockItem> >(new Book2().ProductCode, bk2Stack);
validator.ConsiderItemForDiscount(kvp2);
// 2 * �= � * 0.05 = � 0.8 discount [Twice] = �60
Assert.AreEqual(1.6, validator.TotalDiscount);
}
public void ItExists()
{
var validator = new HarryPotterDiscountCalculator();
}
