public void BreadIsNotHalfOffWithOneBeans()
{
var offer = new TwoBeansIsBreadHalfOffOffer();
var success = offer.TryApplyDiscount(new[] { Bread(), Beans() }, out var discount);
success.Should().BeFalse();
}
public void OnlyAppliesOnceEvenWithLotsOfBread()
{
var offer = new TwoBeansIsBreadHalfOffOffer();
var success = offer.TryApplyDiscount(new[] { Bread(), Bread(), Bread(), Beans(), Beans(), Bread() }, out var discount);
success.Should().BeTrue();
discount.BaseAmount.Should().Be(breadPrice * 0.5m);
discount.TimesApplied.Should().Be(1);
}
public void MultipleBreadsCanAllBeHalfOff()
{
var offer = new TwoBeansIsBreadHalfOffOffer();
var success = offer.TryApplyDiscount(new[] { Bread(), Beans(), Beans(), Beans(), Beans(), Bread() }, out var discount);
success.Should().BeTrue();
discount.BaseAmount.Should().Be(breadPrice * 0.5m);
discount.TimesApplied.Should().Be(2);
}
