[omniORB] Weird interaction between omniORBpy 2.0 and PyUnit 1.4.1

[cp@sophos.com]

I have encountered an annoying problem when using omniORBpy 2.0 and PyUnit 
1.4.1 with Python 2.2. If I use the unittestgui to execute the tests I can 
only run the test once. The first run of my test suite goes ok, but the 
second run displays the following error:

C:\home\corba\myfirst_python>test SimpleTests.SimpleTestSuite
Traceback (most recent call last):
  File "c:\program 
files\python22\lib\site-packages\pyunit-1.4.1\unittestgui.py"
, line 75, in runClicked
    test = unittest.defaultTestLoader.loadTestsFromName(testName)
  File "C:\PROGRA~1\PYTHON22\lib\site-packages\pyunit-1.4.1\unittest.py", 
line 4
33, in loadTestsFromName
    obj = getattr(obj, part)
AttributeError: 'module' object has no attribute 'SimpleTestSuite'

Now, the strange thing is that if I write my tests suite as follows, 
everthing works fine:


---8<--- SimpleTests.py (no omniORBpy) ---8<---

import unittest

class SimpleTestCase(unittest.TestCase):
    def runTest(self):
        pass

def SimpleTestSuite():
    suite = unittest.TestSuite()
    suite.addTest(SimpleTestCase())
    return suite
 
if __name__ == '__main__':
    runner = unittest.TextTestRunner()
    runner.run(SimpleTestSuite())

---8<------8<------8<------8<------8<------8<------


In other words I can press the "start" button on the PyUnit GUI to my 
hearts content and everything works as expected. However, if I add just 
the merest hint of omniORBpy into the mix then things start going wrong. 
The simplest thing I have managed to come up with to demonstrate this is 
by adding a single import as follows:


---8<--- SimpleTests.py (with a dash of omniORBpy) ---8<---

import unittest
from omniORB import CORBA

class SimpleTestCase(unittest.TestCase):
    def runTest(self):
        pass

def SimpleTestSuite():
    suite = unittest.TestSuite()
    suite.addTest(SimpleTestCase())
    return suite
 
if __name__ == '__main__':
    runner = unittest.TextTestRunner()
    runner.run(SimpleTestSuite())

---8<------8<------8<------8<------8<------8<------


With this code I can only press the start button once. Subsequent presses 
yield the error.

I have had a squint at the omniORBpy code and it appears to do some fancy 
module shuffling in the omniORB.__init__ module which may give us a clue 
to what's going on.

I have posted this message with both omniORB and PyUnit as I fear this may 
be a weird interaction that may need work on both sides to resolve. Let me 
know if I can help any further.

Cliff

-- 
Cliff Penton, Head of Software Architecture & Research, Sophos Anti-Virus
Email: cp@sophos.com, DDI: 01235 544017, Web: www.sophos.com
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