TDD approach for implementing a shopping cart..
Implementing the code for a checkout system that handles pricing schemes such as “apples cost 50 pence, three apples cost £1.30.”
In a normal store, things are identified using Stock Keeping Units, or SKUs.
Given the above instance, write up the code for a shopping cart that calculates the total price of a number of items.
In our store, we’ll use individual letters of the alphabet (A, B, C, and so on). Our goods are priced individually. In addition, some items are multi-priced: buy ‘n’ of them, and they’ll cost you ‘y’ pence. For example, item ‘A’ might cost 50 pence individually, but this week we have a special offer: buy three ‘A’s and they’ll cost you £1.30.
Below are the sample prices:
| Item | Unit Price | Special Price |
|---|---|---|
| A | 50 | 3 for 130 |
| B | 30 | 2 for 45 |
| C | 25 | |
| D | 15 |
Our checkout accepts items in any order, so that if we scan a B, an A, and another B, we’ll recognize the two B’s and price them at 45 (for a total price so far of 95). Because the pricing changes frequently, we need to be able to pass in a set of pricing rules each time we start handling a checkout transaction.
The solution should allow for items to input within a simple user interface, and allow for a final total to be calculated and for a running total after each item is added to the basket
This project is licensed under the MIT License.
npm install
npm test
- @shaviyavictor
- @mariakourtesi
© Victor Shaviya.