public void GetDiscount_ForNonQualifyingBasket_DoesntApplyDiscount()
{
var basket = new Mock <ShoppingBasket>(null);
basket.Setup(b => b.GetItem(_ohHenryBar.Id)).Returns(new KeyValuePair <Item, int>(_ohHenryBar, 3));
var discount = new BuyCertainAmountAndGetAdditionalAmountForFreeDiscount(_ohHenryBar, 3, 2);
Assert.AreEqual(0.0, discount.GetDiscount(basket.Object));
}
public void GetDiscount_ForBasketQualifyingExactlyThreeTimes_AppliesDiscountExaclyThrice()
{
var basket = new Mock <ShoppingBasket>(null);
basket.Setup(b => b.GetItem(_ohHenryBar.Id)).Returns(new KeyValuePair <Item, int>(_ohHenryBar, 15));
var discount = new BuyCertainAmountAndGetAdditionalAmountForFreeDiscount(_ohHenryBar, 3, 2);
Assert.AreEqual(6 * _ohHenryBar.Price, discount.GetDiscount(basket.Object));
}
public void GetDiscount_ForEmptyBasket_Returns_0()
{
var basket = new Mock <ShoppingBasket>(null);
Assert.AreEqual(0, _discount.GetDiscount(basket.Object));
}