[SQLObject] running tests

I read http://www.sqlobject.org/DeveloperGuide.html#testing and am
still unclear on exactly how to run a test.  Sorry, this may be a
basic question, but I hope the Developer Guide could be more explicit.

After installing py.test, I basically did this:

$ svn co http://svn.colorstudy.com/SQLObject/trunk SQLObject
$ cd SQLObject
$ python sqlobject/tests/test_unicode.py  -D sqlite:///tmp/foo.db

However:
Traceback (most recent call last):
  File "sqlobject/tests/test_unicode.py", line 1, in <module>
    from sqlobject import *
ImportError: No module named sqlobject

I also tried something like and got basically the same error

$ pytest sqlobject/tests/test_unicode.py  -D sqlite:///tmp/foo.db




Andrew