Design a vending machine that will take a number of coins and return change in the smallest number of coins possible. The machine should take 6 different coin types: 50p, 20p, 10p, 5p, 2p, 1p. There are 3 products: A - 95p, B - £1.26, C - £2.33.
Write tests for your solution using a testing framework of your choice.
It is a bit over-engineered and done for fun, feel free to submit your PRs with improvements.
Implemented features:
- Accepts coins
- Returns change in the smallest number of coins possible
- Accepts 6 different coin types: 50p, 20p, 10p, 5p, 2p, 1p
- When not picked up, the coins are stacked up in the coin return
- Unsupported coins are returned in the coin return
- It is possible to buy only one product in one transaction
- It is still possible to buy products when there are no coins in the machine, it will just keep the credit for the next transaction
- If all products are out of stock and your coins are trapped inside, you can still get them back by canceling the transaction
Install php 8.2 and composer, then run:
composer installTo run the tests:
composer test