public void MultiplyCupWithCost()
{
//arrange
Store store = new Store();
Cup cups = new Cup();
int cupsToBuy = 20;
double cupCost = cups.GetCost();
double priceOfPurchasedcups = cupsToBuy * cupCost;
double result;
//act
result = store.NumberOfCupsPurchased(cupsToBuy);
//assert
Assert.AreEqual(result, priceOfPurchasedcups);
}
