public void Scanning_an_item_gives_a_total_of_that_items_price()
{
IListenForSkus priceLookup = new PriceLookup("testSku", 1234);
Checkout checkout = new CheckoutBuilder().With(priceLookup).Build();
checkout.Scan("testSku");
var total = checkout.Total();
Assert.That(total, Is.EqualTo(1234));
}
public void Scanning_two_item_gives_a_total_of_their_summed_prices()
{
IListenForSkus priceLookup1 = new PriceLookup("ASku", 1234);
IListenForSkus priceLookup2 = new PriceLookup("AnotherSku", 5678);
Checkout checkout = new CheckoutBuilder().With(priceLookup1).With(priceLookup2).Build();
checkout.Scan("ASku");
checkout.Scan("AnotherSku");
var total = checkout.Total();
Assert.That(total, Is.EqualTo(1234 + 5678));
}
public void Applies_applicable_discount()
{
IListenForSkus priceLookup = new PriceLookup("Foo", 0);
IListenForSkus discountTracker = new MultibuyDiscount("Foo", 2, 200);
Checkout checkout = new CheckoutBuilder().With(priceLookup).With(discountTracker).Build();
checkout.Scan("Foo");
checkout.Scan("Foo");
var total = checkout.Total();
Assert.That(total, Is.EqualTo(-200));
}