Joshua Thijssen has a new post to his site sharing an interesting tool for those using PHPUnit for testing. It's a real-time plugin that executes your tests as soon as something in your files change.
Not all IDEs (actually, i haven't seen even one IDE that does this), can run your unit-tests as soon as something changes. Inspired by Greg Young's Mighty Moose system, the following script runs inside a shell, will wait for changes in your PHP-files, and runs the corresponding unit-test as soon as something changes. It doesn't run the WHOLE unit-tests suite, but merely the test that matches up the source file.
His tool, found here on Github and uses a simple bash script that uses the file name being saved to locate the matching test and execute it, reporting back any errors that might have popped up. This could easily be hooked into most IDEs out there and keep the developer in one place.