This is code is completely experimental !
The goal is to integrate PHPUnit and SQLite with Drupal in order to be able to run tests outside of Drupal.
For now you can get a get a Symfony/DomCrawler from a page and log-in and out from Drupal.
# Install composer + init / update, then...
composer.phar install
# Duplicate and adapt the test configuration
# You have to adapt the DRUPAL_ROOT and DRUPAL_URL to point to a working Drupal instance
cp phpunit.xml.dist phpunit.xml
# Run the tests
# The self tests will only succeed if you enabled the short URLs for your Drupal install.
phpunit -c .