Layers of the neo
Testing...
...via the command line
First thing should always be the commandlinetesting. Thats the only way of testing to be shure your hardware is complete and working.
...via dbus api on the command line
pyneo has a dbus api which allows complete testing of really all functionality of the phone (supported by pyneo) to be tested with some commands in a shell, no gui, no dependency, just funtionality at you fingertips - try: dbustesting
...via python scripts
See the python on how to use scripts to do automated testing.
...via gui
It makes completly no sense at all to test anything of the functionality with the gui right now. Just enjoy eye-candy or buy an eyefone if you are looking for this kind of "testing".