In the last few weeks I have been updating documentation on Selenium tests. You can find it here:
https://www.mediawiki.org/wiki/Selenium
Please notice that there is documentation on how to write Selenium tests in Node.js:
https://www.mediawiki.org/wiki/Selenium/Node.js
There is still a lot of things I would like to do, but I think the documentation is now in a good enough shape to announce it.
I am still working on it and I really need your feedback. Feel free to reply here, at IRC (zeljkof at #wikimedia-releng) or at Phabricator:
https://phabricator.wikimedia.org/T108108
I was not working on the documentation alone. I would like to say thank you to Antoine Musso (hashar), Dan Duvall and Greg Grossmeier, among others.
Željko