I just installed version 6.2 of phpED and I'm exploring the integration of phpUnit. The documentation and help are very vague. Does anyone here have any pointers as to how to create test scripts? Google took me to some examples but they're not associated directly to phpED. In particular, where can I find documentation on the unit test object itself (where is the php file, what are the different methods,...)

I am quite new to that subject... Thanks for any help!

First of all, please read phpUnit documentation. This is what you have to start with.
It's phpUnit dictates how to write tests, where to place them, what class and file names are allowed / how formed, etc.