While working at Eelzee Solutions, I assisted in building an automated testing application utilizing Behat and Node.js.
This involved building an interactive tool via Node.js to run via command line which can be used to discover and run specific tests based on specific criteria.
The testing utilized a custom framework that was built to help tightly integrate Drupal and easily create mock site data to assist in testing.
Finally a custom test reporting tool was built to help output desired metrics to CSV files.