public void PricingEngine_Add_Specific_PricingRules()
{
IPricingEngine pe = new PricingEngine();
pe.AddQuantityPricingRule(new QuantityPricingRule("A", 50));
pe.AddQuantityPricingRule(new QuantityPricingRule("A", 2, 80));
pe.AddQuantityDiscountPricingRule(new QuantityDiscountPricingRule("A", 3, 2));
decimal price = pe.GetItemTotalPrice("A", 3);
decimal expectedPrice = 80;
Assert.AreEqual(expectedPrice, price);
}
public void If_QuantityDiscountPricingRule_A_3_2_And_Scan_3A_Then_Price_is_90()
{
IPricingEngine pe = new PricingEngine();
pe.AddQuantityDiscountPricingRule(new QuantityDiscountPricingRule("A", 3, 2));
pe.AddQuantityPricingRule(new QuantityPricingRule("A", 3, 130));
pe.AddQuantityPricingRule(new QuantityPricingRule("A", 2, 90));
pe.AddQuantityPricingRule(new QuantityPricingRule("A", 1, 50));
ICheckout co = new Checkout(pe);
for (int i = 0; i < 3; i++)
{
co.Scan("A");
}
decimal price = co.GetTotalPrice();
decimal expectedPrice = 90;
Assert.AreEqual(expectedPrice, price);
}