public void HandleDiscountForItemB()
{
QuantityBasedDiscount quantityBasedDiscount = new QuantityBasedDiscount();
Cart cart = new Cart();
cart.Items = new List <CartItem>();
cart.Items.Add(new CartItem()
{
Quantity = 2,
ProductInfo = new ProductInfo("B", 30)
});
quantityBasedDiscount.HandleDiscount(cart);
Assert.AreEqual(45, cart.TotalPrice);
}
public void HandleDiscountForFiveItemA()
{
QuantityBasedDiscount quantityBasedDiscount = new QuantityBasedDiscount();
Cart cart = new Cart();
cart.Items = new List <CartItem>();
cart.Items.Add(new CartItem()
{
Quantity = 5,
ProductInfo = new ProductInfo("A", 50)
});
quantityBasedDiscount.HandleDiscount(cart);
Assert.AreEqual(230, cart.TotalPrice);
}
public void HandleDiscountForNegativeFiveItemA()
{
QuantityBasedDiscount quantityBasedDiscount = new QuantityBasedDiscount();
Cart cart = new Cart();
cart.Items = new List <CartItem>();
cart.Items.Add(new CartItem()
{
Quantity = -5,
ProductInfo = new ProductInfo("A", 50)
});
quantityBasedDiscount.HandleDiscount(cart);
// handle negative price before applying promotion
Assert.AreEqual(-250, cart.TotalPrice);
}
public void QuantityBasedDiscount_ShouldNotFailForEmptyCart()
{
QuantityBasedDiscount quantityBasedDiscount = new QuantityBasedDiscount();
quantityBasedDiscount.HandleDiscount(new Cart());
}
public void QuantityBasedDiscount_ShouldNotFailForNull()
{
QuantityBasedDiscount quantityBasedDiscount = new QuantityBasedDiscount();
quantityBasedDiscount.HandleDiscount(null);
}