Hello,
Last summer, Timo installed a JavaScript testing system on the toolserver. This system let us easily run our JavaScript tests on a subset of browsers with close to no human interaction. It saves up a lot of time.
We have reinstalled the system from scratch to one of the WMF server, and you can point you browser at the following URL to start executing tests:
http://integration.mediawiki.org/testswarm/
The dashboard is at: http://integration.mediawiki.org/testswarm/user/MediaWiki/
Each line is a MediaWiki (trunk) revision. Each column a browser. For each combinaison, the cell is colored in: - gray : no test run yet, not all tests run - green : all tests successful - red : at least one test failed! Revision is broken :)
When clicking on the left revision, you will obtain the test results for each module. The tests results are saved there so you can look at the diff and eventually rerun them.