public void CheckNoDiscountProducts()
{
var offer = new DiscountOffer("Soup", 0.3m);
var discountProduct = offer.DetermineSpecialOffer(_products);
Assert.IsNull(discountProduct);
}
public void CheckEggDiscount()
{
var offer = new DiscountOffer("Eggs", 0.1m);
var discountProduct = offer.DetermineSpecialOffer(_products);
//expecting 10% off the price of Eggs (30p), so discountProduct should be 3p
Assert.AreEqual("Eggs 10% off", discountProduct.ProductName);
Assert.AreEqual(-0.03m, discountProduct.Price);
}