[Python-Dev] unittest bug

[Ethan Furman]

My apologies for posting here first, but I'm not yet confident enough in 
my bug searching fu, and duplicates are a pain.

Here's the issue:

from unittest import *
class MyTest(TestCase):
     def test_add(self):
         self.assertEqual(1,(2-1),"Sample Subraction Test")


if __name__ == '__main__':
     main()

I know this isn't the normal way to use unittest, but since __init__ 
goes to the trouble of defining __all__ I would think it was supported. 
  However, it doesn't work -- I added some print statements to show 
where the problem lies (in unittest.loader.TestLoader.loadTestsFromModule):

----------------------------------------------------------------------
checking <class 'unittest.case.FunctionTestCase'>
         added
checking <class '__main__.MyTest'>
         added
checking <class 'unittest.case.SkipTest'>
checking <class 'unittest.case.TestCase'>
         added
checking <class 'unittest.loader.TestLoader'>
checking <class 'unittest.result.TestResult'>
checking <class 'unittest.suite.TestSuite'>
checking <class 'unittest.runner.TextTestResult'>
checking <class 'unittest.runner.TextTestRunner'>
checking <module 'builtins' (built-in)>
checking None
checking None
checking 'test_add.py'
checking '__main__'
checking None
checking <unittest.loader.TestLoader object at 0x00C92BF0>
checking <function expectedFailure at 0x00C7D930>
checking <function findTestCases at 0x00C8CA50>
checking <function getTestCaseNames at 0x00C8C9C0>
checking <function installHandler at 0x00C97A08>
checking <class 'unittest.main.TestProgram'>
checking <function makeSuite at 0x00C8CA08>
checking <function registerResult at 0x00C97978>
checking <function removeHandler at 0x00C97A50>
checking <function removeResult at 0x00C979C0>
checking <function skip at 0x00C7D858>
checking <function skipIf at 0x00C7D8A0>
checking <function skipUnless at 0x00C7D8E8>

test =
<unittest.suite.TestSuite tests=[<unittest.suite.TestSuite 
tests=[<unittest.case.FunctionTestCase tec=runTest>]>, 
<unittest.suite.TestSuite tests=[<__main__.
MyTest testMethod=test_add>]>, <unittest.suite.TestSuite tests=[]>]>
---------------------------------------------------------------------

compared with running using the `import unittest` method:
---------------------------------------------------------------------
checking <class '__main__.MyTest'>
         added
checking <module 'builtins' (built-in)>
checking None
checking None
checking 'test_add_right.py'
checking '__main__'
checking None
checking <module 'unittest' from 'C:\python32\lib\unittest\__init__.py'>

test =
<unittest.suite.TestSuite tests=[<unittest.suite.TestSuite 
tests=[<__main__.MyTest testMethod=test_add>]>]>
---------------------------------------------------------------------

As you can see, the TestLoader is getting false positives from 
case.FunctionTestCase and case.TestCase.  This a problem because, 
besides running more tests than it should, this happens:

E.
======================================================================
Traceback (most recent call last):
   File "test_add.py", line 8, in <module>
     main()
   File "C:\python32\lib\unittest\main.py", line 125, in __init__
     self.runTests()
   File "C:\python32\lib\unittest\main.py", line 271, in runTests
     self.result = testRunner.run(self.test)
   File "C:\python32\lib\unittest\runner.py", line 175, in run
     result.printErrors()
   File "C:\python32\lib\unittest\runner.py", line 109, in printErrors
     self.printErrorList('ERROR', self.errors)
   File "C:\python32\lib\unittest\runner.py", line 115, in printErrorList
     self.stream.writeln("%s: %s" % (flavour,self.getDescription(test)))
   File "C:\python32\lib\unittest\runner.py", line 47, in getDescription
     return '\n'.join((str(test), doc_first_line))
   File "C:\python32\lib\unittest\case.py", line 1246, in __str__
     self._testFunc.__name__)
AttributeError: 'str' object has no attribute '__name__'

I'll be happy to file a bug report if someone can confirm this hasn't 
already been filed.

Thanks for the help!

~Ethan~

PS
No, that's not my code. ;)