Unit Testing

[eluser]Michael Wales[/eluser]
Once again, it's all on a case-by-case basis. Usually you'll have all of your tests in one directory, so it would be trivial for a library to scan through, grab all test classes and execute them.

The most difficult part in working with tests is in maintaining your "closures" - the data the test cases will use with your application.

PHPUnit is by far the de-factor Unit Testing library for PHP. Googling will provide hundreds of tutorials and information on it all.