We now have Travis  hooked up to the Diff  repository that gets automatically updated from the WMF hosted one . This means that for every commit, a build will be made and listed here .
The builds are currently done by running the tests on all of PHP 5.3, 5.4 and 5.5. This and other config can be specified in a .travis.yml in the root dir of the component . Travis supports SQLite, MySQL and PostGres, so hopefully we'll be able to have the tests for Wikibase run on all of these. The PHPUnit tests are run using the phpunit.xml.dist config file in the root dir, so this is more reliable then the WMF jenkins setup at this point, which is still using the MediaWiki hook manual test registration stuff.
Currently this is only done for Diff, though we are working on also having this work for our other components. The main problem there is getting the relevant dependencies pulled and loaded, which could be done with some git clones in the setup section of the Travis config file. It'd however be better to not duplicate this info which is already in composer.json and actually use Composer to do the task. I'm going to try to get that working for Ask and then Wikibase. If that takes to long, I'll switch to using simple git clones so this testing stuff is not blocked on getting our components to work with Composer.
Jeroen De Dauwhttp://www.bn2vs.com
Don't panic. Don't be evil.