public void TestScanMultipleItems()
{
ItemRule ruleForA = new ItemRule('A', 50);
CheckOut checkout = new CheckOut(new List<IRule>() { ruleForA });
checkout.Scan('A');
checkout.Scan('A');
Assert.AreEqual(100, checkout.Total);
}
public void TestScanDifferentlyPricedItems()
{
ItemRule ruleForA = new ItemRule('A', 50);
ItemRule ruleForB = new ItemRule('B', 30);
List<IRule> myRules = new List<IRule>() { ruleForA, ruleForB };
CheckOut checkout = new CheckOut(myRules);
checkout.Scan('A');
checkout.Scan('B');
Assert.AreEqual(80, checkout.Total);
}
public void TestScanMultipleItemsMultiPriced()
{
IRule ruleForA = new ItemRule('A', 50);
IRule ruleForThreeA = new MultipriceItemRule('A', 3, 130);
IRule ruleForB = new ItemRule('B', 30);
IRule ruleForTwoB = new MultipriceItemRule('B', 2, 45);
List<IRule> myRules = new List<IRule>() { ruleForA, ruleForThreeA, ruleForB, ruleForTwoB };
CheckOut checkout = new CheckOut(myRules);
checkout.Scan('A');
checkout.Scan('B');
Assert.AreEqual(80, checkout.Total);
checkout.Scan('A');
checkout.Scan('A');
Assert.AreEqual(160, checkout.Total);
checkout.Scan('B');
Assert.AreEqual(175, checkout.Total);
checkout.Scan('B');
Assert.AreEqual(205, checkout.Total);
checkout.Scan('A');
Assert.AreEqual(255, checkout.Total);
}
public void TestScanMultipricedItem()
{
IRule ruleForA = new ItemRule('A', 50);
IRule ruleForThreeA = new MultipriceItemRule('A', 3, 130);
List<IRule> myRules = new List<IRule>() { ruleForA, ruleForThreeA };
CheckOut checkout = new CheckOut(myRules);
checkout.Scan('A');
checkout.Scan('A');
Assert.AreEqual(100, checkout.Total);
checkout.Scan('A');
Assert.AreEqual(130, checkout.Total);
}
private int price(string goods)
{
CheckOut checkout = new CheckOut(rules);
foreach (char item in goods)
{
checkout.Scan(item);
}
return checkout.Total;
}