To launch the tests, run the runtests.sh script. You must have phantomjs on your path to launch.
runner.js is a qunit extension to run qunit tests inside of phantomjs and is made available under the MIT license. The version used is the following commit from github:
https://github.com/jquery/qunit/commit/9242bf7b7a743652702914adb770150a71492d6c