YUI 2.5.1 has been released. This includes a fix to the Cookie utility for a subcookie parsing issue that was brought to my attention. Always a nice way to start the work day, I might add.

So I quickly created a new test case using YUI Test and sure enough, it was broken. I then went through several iterations of changes, re-running the tests and finding that a minor change here affected a lot of functionality. Have I mentioned how much I love unit testing? After I finally got a fix and made sure all the tests passed, I knew the work was done and I felt assured that there were no regressions.

I’ve actually developed most of the Cookie utility using YUI Test and it has saved my butt on a number of occasions. I’m working on putting together a talk about JavaScript unit testing using YUI Test (still waiting to hear back from a certain conference….nudge, nudge), and I’m so glad I’ll be able to give a concrete example of how it can be useful.