Testing Laravel's core is a critical part of making and submitting changes to the codebase. Without testing it's incredibly difficult to know if your changes break something. It's possible that your seemingly perfect modification could cause an error in something obscure that few people would ever use. It's important to test for an increased level of confidence.
A few preparations must be made when unit testing Laravel's core in Windows. In the video I walk through updating PEAR, PHPUnit, enabling the fileinfo PHP extension, and pulling down the framework / core tests.
Clone the Laravel framework.
git clone https://github.com/laravel/laravel.git
Clone the laravel-tests bundle into the bundles folder.
cd laravel/bundles git clone https://github.com/laravel/tests.git laravel-tests
Change directories to your PHP installation folder.
pear upgrade pear
pear upgrade phpunit/PHPUnit
Laravel's File class uses the fileinfo extension. This is generally not enabled by default in Windows packages.
In your php.ini file find the following line.
Uncomment the extension by removing the semi-colon.
Then restart your apache.
Change directories into the folder that you cloned Laravel into.
Then, run the tests against the core.
php artisan test:core