We do seem to have some issues with the search - I'll see if I can find out what's up.
This is a correction over a previously flawed implementation. I'm preparing the release notes right now though so I'll be sure to make it clear how to migrate this.
You can't... currently. The unit tests are all written using YUI test, but run in our own testing environment. We run the tests in the browser/OS combinations we support and as of now everything is passing.
It's likely that we'll release the testing harness when it has matured a little (it's a very young project), but in the mean time here's a sneak peek.

