static void Main(string[] args)
{
var inv = new Inventory();
Console.WriteLine("Just Running the test :P");
inv.AddSKU('A', 50);
inv.AddSKU('B', 30.0d);
inv.AddSKU('C', 20.0d);
inv.AddSKU('D', 15.0d);
var rules = new List <IDiscountRule>()
{
new SameSKUFixedPriceRule('A', 3, 130, inv),
new CombinationDiscountRule('C', 'D', 30.00d, inv),
new SameSKUFixedPriceRule('B', 2, 45.00d, inv)
};
var engine = new DiscountEngine(rules);
Console.WriteLine("Scenario 1");
Cart cart = new Cart(inv);
cart.AddItem('A', 1);
cart.AddItem('B', 1);
cart.AddItem('C', 1);
double discount = engine.ApplyAllDiscounts(cart);
Console.WriteLine(String.Format("Cart Value {0} and Discount is {1} /n Amount Tobe Paid {2}", cart.CartValue, discount,
cart.CartValue - discount));
Console.WriteLine("============================================================");
Console.WriteLine("Scenario 2");
cart = new Cart(inv);
cart.AddItem('A', 5);
cart.AddItem('B', 5);
cart.AddItem('C', 1);
discount = engine.ApplyAllDiscounts(cart);
Console.WriteLine(String.Format("Cart Value {0} and Discount is {1} /n Amount Tobe Paid {2}", cart.CartValue, discount,
cart.CartValue - discount));
Console.WriteLine("============================================================");
Console.WriteLine("Scenario 3");
cart = new Cart(inv);
cart.AddItem('A', 3);
cart.AddItem('B', 5);
cart.AddItem('C', 1);
cart.AddItem('D', 1);
discount = engine.ApplyAllDiscounts(cart);
Console.WriteLine(String.Format("Cart Value {0} and Discount is {1} /n Amount Tobe Paid {2}", cart.CartValue, discount,
cart.CartValue - discount));
Console.WriteLine("============================================================");
Console.ReadKey();
}
public void ShouldApplyDiscountBasedOnWhichOffersBestValue()
{
var Rule1 = new SameSKUFixedPriceRule('A', 3, 130, GetTestInventory());
var Rule2 = new CombinationDiscountRule('C', 'D', 40.00d, GetTestInventory());
var engine = new DiscountEngine.DiscountEngine(new List <IDiscountRule>()
{
Rule1, Rule2
});
var cart = new Cart(GetTestInventory());
cart.AddItem('A', 10);
cart.AddItem('C', 1);
Assert.AreEqual(60.00d, engine.ApplyBestDiscount(cart));
}
public void ShouldApplyDiscountForAllApplicableRules()
{
var Rule1 = new SameSKUFixedPriceRule('A', 3, 130, GetTestInventory());
var Rule2 = new CombinationDiscountRule('C', 'D', 40.00d, GetTestInventory());
var engine = new DiscountEngine.DiscountEngine(new List <IDiscountRule>()
{
Rule1, Rule2
});
var cart = new Cart(GetTestInventory());
cart.AddItem('A', 5);
cart.AddItem('C', 5);
cart.AddItem('D', 5);
Assert.AreEqual(145.00d, engine.ApplyAllDiscounts(cart));
}
