public void CalculateDiscount(Order o)
{
double discount = 0;
foreach (OrderItem oi in o.Items)
{
if (oi.Qty > 1)
{
discount += oi.Product.Price * (oi.Qty / 2) * 30/100;
}
}
o.Discount = discount;
}
public void D1WhenBuying2ApplyOnlyOnSecondItem()
{
Product p = new Product();
p.Sku = "100.1";
p.Name = "Umbrella";
p.Price = 20;
Order order = new Order();
order.Add(p, 2);
DiscountEngine de = new DiscountEngine();
de.CalculateDiscount(order);
Assert.AreEqual(6, order.Discount);
}
public void D1NotAppliedWhenBuying1Item()
{
//setup
Product p = new Product();
p.Sku = "100.1";
p.Name = "Umbrella";
p.Price = 20;
Order order = new Order();
order.Add(p,1);
DiscountEngine de = new DiscountEngine();
//exercise
de.CalculateDiscount(order);
//verify
Assert.AreEqual(0, order.Discount);
}