public void Checkout_Cart_Empty()
{
IPolicy policy = new PurchaseOfferPolicy();
policy.Add(new PurchaseRule("A", 3, 130M));
IProductService productService = new ProductService();
Checkout checkout = new Checkout(policy, productService);
Assert.AreEqual(0, checkout.Total);
}
public void Checkout_Cart_Item_3A2B()
{
IPolicy policy = new PurchaseOfferPolicy();
policy.AddRange(new[] { new PurchaseRule("A", 3, 130M), new PurchaseRule("B", 2, 45M) });
IProductService productService = new ProductService();
Checkout checkout = new Checkout(policy, productService);
checkout.ScanItem("A");
checkout.ScanItem("B");
checkout.ScanItem("A");
checkout.ScanItem("A");
checkout.ScanItem("B");
Assert.AreEqual(175, checkout.Total);
}
public void Checkout_Cart_Item_3AB()
{
IPolicy policy = new PurchaseOfferPolicy();
IRule rule = new PurchaseRule("A", 3, 130M);
policy.Add(rule);
IProductService productService = new ProductService();
Checkout checkout = new Checkout(policy, productService);
checkout.ScanItem("A");
checkout.ScanItem("B");
checkout.ScanItem("A");
checkout.ScanItem("A");
Assert.AreEqual(160, checkout.Total);
}
public void Checkout_Cart_Item_6A_EachItemScanned()
{
IPolicy purchasePolicy = new PurchaseOfferPolicy();
purchasePolicy.AddRange(new[] { new PurchaseRule("A", 3, 130M), new PurchaseRule("B", 2, 45M) });
//var policy = new DiscountOfferPolicy(purchasePolicy);
//policy.Add(new DiscountRule() { DiscountAmount = 100, MinTotalAmount = 200 });
IProductService productService = new ProductService();
Checkout checkout = new Checkout(purchasePolicy, productService);
int assertCount = 1;
int groupCount = 0;
var groupAmount = 0;
var product = productService.GetProductByProductCode("A");
checkout.ItemScanned += (sender, e) =>
{
if (assertCount % 3 == 0)
{
groupCount++;
groupAmount = 130 * groupCount;
Assert.AreEqual(groupAmount, checkout.Total);
}
else
{
var amount = groupAmount + (product.Price * (assertCount % 3));
Assert.AreEqual(amount, e.TotalAmount);
}
assertCount++;
};
checkout.ScanItem("A");
checkout.ScanItem("A");
checkout.ScanItem("A");
checkout.ScanItem("A");
checkout.ScanItem("A");
checkout.ScanItem("A");
Assert.AreEqual(260, checkout.Total);
}
public void Checkout_Cart_Item_6A_Discount100()
{
IPolicy purchasePolicy = new PurchaseOfferPolicy();
purchasePolicy.AddRange(new[] { new PurchaseRule("A", 3, 130M), new PurchaseRule("B", 2, 45M) });
var policy = new DiscountOfferPolicy(purchasePolicy);
policy.Add(new DiscountRule()
{
DiscountAmount = 100, MinTotalAmount = 200
});
IProductService productService = new ProductService();
Checkout checkout = new Checkout(policy, productService);
checkout.ScanItem("A");
checkout.ScanItem("A");
checkout.ScanItem("A");
checkout.ScanItem("A");
checkout.ScanItem("A");
checkout.ScanItem("A");
Assert.AreEqual(160, checkout.Total);
}
