CODEWITHSUNDEEP
pythonpydev
Russ Bateman
Russ Bateman

Reputation: 18643

unittest fails on import--missing symbols

Am new to Python, Python command line and PyDev. Fedora 20, Python 2.7.5 as it came on this distro. I am unable to write a unit test. Have tried importing unittest and unittest2 (as here).

from unittest2 import TestCase, main

def IsOdd( n ):
    return n % 2 == 1

class IsOddTests( TestCase ):
    def testOne( self ):
        self.failUnless( IsOdd( 1 ) )
    def testTwo( self ):
        self.failIf( IsOdd( 2 ) )

def main():
    main()

if __name__ == '__main__':
    main()

Each import has its problems. This happens whether from PyDev console in Eclipse or at the command line shell. I have looked at what's under /usr/lib/python2.7/site-packages/* and I find the missing symbols (TestCase and unit), but this isn't helpful to present case.

/usr/bin/python 2.7.5 (default, Nov  3 2014, 14:26:24) 
[GCC 4.8.3 20140911 (Red Hat 4.8.3-7)]
PyDev console: starting.
>>> from unittest2 import TestCase, main
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "/usr/lib/python2.7/site-packages/unittest2/__init__.py", line 40, in <module>
    from unittest2.collector import collector
  File "/usr/lib/python2.7/site-packages/unittest2/collector.py", line 3, in <module>
    from unittest2.loader import defaultTestLoader
  File "/usr/lib/python2.7/site-packages/unittest2/loader.py", line 8, in <module>
    import unittest
  File "/home/russ/dev/python-workspace/max/src/unittest.py", line 11, in <module>
    from unittest2 import TestCase, main
  File "/usr/lib/python2.7/site-packages/unittest2/main.py", line 7, in <module>
    from unittest2 import loader, runner
  File "/usr/lib/python2.7/site-packages/unittest2/runner.py", line 7, in <module>
    from unittest2 import result
  File "/usr/lib/python2.7/site-packages/unittest2/result.py", line 26, in <module>
    class TestResult(unittest.TestResult):
AttributeError: 'module' object has no attribute 'TestResult'
>>> from unittest import TestCase, main
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "/home/russ/dev/python-workspace/max/src/unittest.py", line 11, in <module>
    from unittest2 import TestCase, main
  File "/usr/lib/python2.7/site-packages/unittest2/__init__.py", line 40, in <module>
    from unittest2.collector import collector
  File "/usr/lib/python2.7/site-packages/unittest2/collector.py", line 3, in <module>
    from unittest2.loader import defaultTestLoader
  File "/usr/lib/python2.7/site-packages/unittest2/loader.py", line 12, in <module>
    from unittest2 import case, suite
  File "/usr/lib/python2.7/site-packages/unittest2/case.py", line 10, in <module>
    from unittest2 import result
  File "/usr/lib/python2.7/site-packages/unittest2/result.py", line 9, in <module>
    from unittest2 import util
ImportError: cannot import name util

Upvotes: 1

Views: 719

Answers (2)

notorious.no
notorious.no

Reputation: 5107

I noticed this in your back trace:

File "/home/russ/dev/python-workspace/max/src/unittest.py", line 11, in <module>

and this:

class TestResult(unittest.TestResult):
AttributeError: 'module' object has no attribute 'TestResult'

Rename your file. You've named your script unittest.py, so Python is looking at your unittest script for classes (like TestResult) and not the builtin unittest module like it's supposed to.

Upvotes: 1

Greg
Greg

Reputation: 5588

I've never used unittest2. It seems like using plain unittest might be a bit better for your situation given that its a python builtin and is well vetted. I was able to get this to work for me

from unittest import TestCase, main as unittest_main

def IsOdd( n ):
    return n % 2 == 1

class IsOddTests( TestCase ):
    def testOne( self ):
        self.failUnless( IsOdd( 1 ) )
    def testTwo( self ):
        self.failIf( IsOdd( 2 ) )

def main():
    unittest_main()

if __name__ == '__main__':
    main()

Then running it

0 ✓ greg@MinasArnor ~/workspace $ python test.py 
..
----------------------------------------------------------------------
Ran 2 tests in 0.001s

OK

Upvotes: 1

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