public void Setup()
{
var offers = new Offers(new List<Offer>
{
new Offer{SKU = 'A', Frequency = 3, Discount = 20},
new Offer{SKU = 'B', Frequency = 2, Discount = 15}
});
var catalogue = new Catalogue(new Dictionary<char, int> {{'A', 50}, {'B', 30}, {'C', 20}, {'D', 15}});
_checkout = new Checkout(offers, catalogue);
}
public Checkout(Offers offers, Catalogue catalogue)
{
_prices = catalogue;
_offers = offers;
}