Testing legacy code, using code coverage and mutation testing
Hi and welcome to team Gilded Rose. As you know, we are a small inn with a prime location in a prominent city ran by a friendly innkeeper named Allison. We also buy and sell only the finest goods. Unfortunately, our goods are constantly degrading in quality as they approach their sell by date. We have a system in place that updates our inventory for us. It was developed by a no-nonsense type named Leeroy, who has moved on to new adventures.
This introduction, and this Kata is taken from emilybache and this Kata was originally created by Terry Hughes
i've merely taken the above repository and incorporated coverage reporting and mutation testing. Feel free to check out the originals and undertake your own approach.
To refactor the code following the requirements.
My recommended approach for this as a learning tool for mutation testing is to start by testing core functionality with code coverage, then refactor using TDD and improve the tests with mutation.
To begin the kata, install the requirements below then run:
composer install
to run unit tests:
composer test
to generate test coverage report:
composer test-coverage
to run infection mutation scripts:
composer test-infection
PHP 7:
This is usually bundled with your operating system, or fetchable using a package manager like apt or homebrew.
Windows users can find the latest version here: https://windows.php.net/download#php-7.3
If you want to compile from source code, that can be found here: https://www.php.net/downloads.php
Composer:
Composer is PHP's main package and dependency management tool.
It can be downloaded here: https://getcomposer.org/download/
Xdebug: Xdebug was required to successfully run code coverage commands
pecl install xdebug
article about this here: https://medium.com/yish/xdebug-on-php7-3-laravel-valet-with-homebrew-6ad1a7c3c1ad