public void SugarCostTest()
{
CoffeeMachine coffee_machine = new Coffee();
coffee_machine = new Sugar(coffee_machine);
int expected = 52;
int actual;
actual = coffee_machine.GetCost();
Assert.AreEqual(expected, actual);
}
public void MultiplySugarWithCost()
{
//arrange
Store store = new Store();
Sugar sugar = new Sugar();
int sugarToBuy = 20;
double sugarCost = sugar.GetCost();
double priceOfPurchasedSugar = sugarToBuy * sugarCost;
double result;
//act
result = store.NumberOfSugarPurchased(sugarToBuy);
//assert
Assert.AreEqual(priceOfPurchasedSugar, result);
}