We are starting an electronics store. You have been asked to build the checkout system. We will start with the following products in our catalogue-
| SKU | Name | Price |
|---|---|---|
| op10 | Oneplus 10 | $849.99 |
| op11 | Oneplus 11 | $949.99 |
| buds | Earbuds | $129.99 |
| wtch | Smart Watch | $229.99 |
As we're launching our new electronics store, we would like to have a few opening day specials:
- We're going to have a 3 for 2 deal on Earbuds. For example, if you buy 3 Earbuds, you will pay the price of 2 only
- The brand new Oneplus 11 will have a bulk discount applied where the price will drop to $899.99 each if someone buys more than 4
As our Sales manager is quite indecisive, we would want the pricing rules to be as flexible as possible as they can change in the future with little notice.
Our checkout system can scan items in any order.
The interface to our checkout looks like this (shown in typescript):
const co = new Checkout(pricingRules);
co.scan(item1);
co.scan(item2);
co.total();Your task is to implement a checkout system that fulfills the requirements described above.
SKUs Scanned: buds, op10, buds, buds Total expected: $1109.97
SKUs Scanned: wtch, op11, op11, op11, buds, buds, op11, op11 Total expected: $4989.92
Notes on implementation:
- use Typescript
- try not to spend more than 4-5 hours maximum. (We don't want you to lose a weekend over this!)
- don't build guis etc, we're more interested in your approach to solving the given task, not how shiny it looks
- don't worry about making a command line interface to the application
- you can use basic libraries, but the core logic has to be your own
- add test cases apart from the above 2 examples
When you've finished, send us the link to your GitHub-repo.