Behat is a test framework for behavior-driven development (BDD) written in the PHP programming language.
Mink removes API differences between different browser emulators providing different drivers for every browser emulator and providing you with an easy way to control the browser , traverse pages, manipulate page elements or interact with them.
Drupal Extension help in automation for Drupal Websites. The Drupal Extension to Behat and Mink assists in the performance of several common Drupal testing tasks.
Introduction to Drupal Extension