Promotional Campaigns

A small command-line utility to apply certain promotional campaigns to give discounts. The system needs to be flexible regarding the promotional rules.

Product code	Name	Price
001	Curry Sauce	1.95 €
002	Pizza	5.99 €
003	Men’s T-Shirt	25.00 €

• If you spend over €30, you get 10% off your purchase.
• If you buy 2 or more pizzas, the price for each drops to €3.99.

Items in basket	Total price
002,001,002,003	31.44 €

How it works?
5.99+1.95+5.99+25.00	= 38.93
38.93−(5.99−3.99)×2	= 34.93
34.93−(34.93×10)÷100	= 31.437
round(31.437, 2)	= 31.44

Test Cases

Items in basket	Total price
001,002,003	29.65 €
002,001,002	9.93 €
002,001,002,003	31.44 €

Prerequisites

composer
php (>=8.2)

Installation and Run the script

• All the code required to get started
• Need write permission to following directory

./var/logs

• Install the script

$ cd /path/to/base/directory
$ composer install --no-dev

• Run the script and sample output

$ php index.php
€31.44

Running the tests

• Follow Install instructions. Adapt phpunit.xml.dist PHP Constant according to your setup environment.

$ cd /path/to/base/directory
$ composer update
$ ./vendor/bin/phpunit tests

Test-cases, test unit and integration tests.