Lately I’ve been working quite a lot with unit test using SimpleTest - so I often had to run scripts directly from command line. But wouldn’t it be cool if I just could write a test and run it directly under my code editor without even leaving it? And if you using Sublime Text 2 (and I really recommend checking it out - it’s gorgeous, it’s slim, it’s ultra fast and you can do basically everything with it) - you easily can.