public void The_total_is_the_total_price_of_multiple_scanned_items()
{
var unit = new Checkout(_itemCatalogue, _discounts);
_basket.TakeItem().Returns(_item1, _item2, null);
_itemCatalogue.LookupPrice(_item1).Returns(_item1Price);
_itemCatalogue.LookupPrice(_item2).Returns(_item2Price);
_discounts.GetApplicable(Arg.Any <Collection <IPurchaseable> >()).Returns(new Discount(0));
unit.Scan(_basket);
var expected = _item1Price.AsCurrency() + _item2Price.AsCurrency();
Assert.That(unit.GetTotal().AsCurrency(), Is.EqualTo(expected));
}
public void It_can_add_a_discount()
{
var unit = new Price(100);
var discount = new Discount(50);
var expectedPrice = unit.AsCurrency() + discount.InCurrency();
var actualPrice = unit.Add(discount);
Assert.That(actualPrice.AsCurrency(), Is.EqualTo(expectedPrice));
}
public void It_can_add_another_Price()
{
var unit = new Price(100);
var other = new Price(200);
var expectedPrice = unit.AsCurrency() + other.AsCurrency();
var actualPrice = unit.Add(other);
Assert.That(actualPrice.AsCurrency(), Is.EqualTo(expectedPrice));
}
public void It_can_be_read_in_pounds_and_pence()
{
var unit = new Price(159);
Assert.That(unit.AsCurrency(), Is.EqualTo(1.59));
}
public void It_is_initially_zero()
{
var unit = new Price();
Assert.That(unit.AsCurrency(), Is.EqualTo(0));
}
private void ThenTheTotalShouldBe(double expectedTotal)
{
Assert.That(_total.AsCurrency(), Is.EqualTo(expectedTotal));
}
