OCP Checkout kata
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The document describes a supermarket checkout kata problem to write code that calculates the total price of items in a shopping basket according to different pricing rules, including: - A single item has a constant price - Buying 3 of the same item ("A") gets a 20p discount - Buying 2 of the same item ("B") gets a 15p discount - Buying a starter ("A"), main ("B") and dessert ("C" or "D") is priced at 85 - Test cases are provided to test the pricing logic
OCP Checkout kata
- 1. OCP Supemarket Checkout Kata Using the OCP rules, write a supermarket checkout controller, using the following test template: public class CheckoutTester { private int price(String... items) { Checkout checkout = new CheckoutFactory().create(); for (String item : items) checkout.scan(item); return checkout.total(); } @Test public void emptyBasket() { assertEquals(0, price("")); } }
- 2. OCP Supemarket Checkout Kata An empty basket has a zero price: @Test public void emptyBasket() { assertEquals(0, price("")); } A single item has a constant price: @Test public void singleItem() { assertEquals(50, price("A")); assertEquals(30, price("B")); assertEquals(20, price("C")); assertEquals(15, price("D")); }
- 3. Special offers 3 As get a 20p discount: AA → 100 AAA → 130 AAAA → 180 etc... 2 Bs get a 15p discount: BB → 45 ABABA → 175 ACABDB → 180 etc... A starter (A), a main (B) and either pudding (C,D) for 85: BDA → 85 AADC → 135 AABCA → 180 etc...
- 4. OCP Supemarket Checkout Kata The original problem is here: http://codekata.pragprog.com/2007/01/kata_nine_back_.html