public void ShouldReturnDiscountAmountBasedOnItemsAdded()
{
Cart cart = new Cart(GetTestInventory());
cart.AddItem('A', 5);
SameSKUFixedPriceRule testObj = new SameSKUFixedPriceRule('A', 3, 130, GetTestInventory());
Assert.AreEqual(20.00d, testObj.CalculateDiscountAmount(cart));
}
public void ShouldReturnFalseIfACartWithThreeSKUSOFTypePassedIsInCart()
{
Cart cart = new Cart(GetTestInventory());
cart.AddItem('B', '5');
SameSKUFixedPriceRule testObj = new SameSKUFixedPriceRule('A', 3, 130, GetTestInventory());
Assert.IsFalse(testObj.isApplicableOnCart(cart));
}
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));
}
