Behat

Given the interest shown at Drupalcon Portland with both a crowded session and BOF, the next step of fostering a growing use of Behat is to have a group of interested users/developers/etc. Behat, if embraced by enough Drupal folks, has the potential to vastly improve the way we test Drupal websites.

Behat IS NOT unit testing nor a specification testing tool. Behat is a Scenario-oriented BDD framework with functional testing capabilities as part of a communication process between stake-holders and developers. Behat was created and is evolving as an agile planning and functional testing methodology. However, if you want to use it as unit testing or spec testing tool, you can, but keep in mind, that it wasn't intended to do ideologically. http://groups.drupal.org/unit-testing is a better place for discussion of unit-testing. Yes, there is some overlap, but that is because of the spectrum in the testing pyramid with the various types of testing: unit tests (base), functional/acceptance tests (middle), (G)UI tests (peak)

Behat was created to address black-box like, functional, user-observable behavior testing.