public void CalculateDiscount_WithoutAnyEntries_ReturnsNoDiscount()
{
var testRule = new BuyTwoGetOneFreeDiscountRule();
var basketEntries = new List <BasketEntry>();
var discount = testRule.CalculateDiscount(basketEntries);
Assert.AreEqual(0M, discount);
}
public void CalculateDiscount_WithSingleQualifyingEntry_ReturnsCorrectDiscount()
{
var testRule = new BuyTwoGetOneFreeDiscountRule();
var basketEntries = new List <BasketEntry>(new[] {
new BasketEntry(new Item(name: "Test1", price: 1), quantity: 2),
});
var discount = testRule.CalculateDiscount(basketEntries);
Assert.AreEqual(1M, discount);
}
