Long time coming...
http://www.mediawiki.org/wiki/How_to_become_a_MediaWiki_hacker#Testing
First, set up the MW testing environment:
Grab the latest MW (1.15 branch):
Somewhere in the web-directory:
svn co http://svn.wikimedia.org/svnroot/mediawiki/branches/REL1_15/phase3/ MW1_15
Configured using all the default settings.
Next, grab some extensions:
http://svn.wikimedia.org/svnroot/mediawiki/branches/REL1_15/extensions/
Write some tests using http://seleniumhq.org/
1) Install the Selenium-IDE (Firefox plugin)
