# wtf.py
#!/usr/bin/python 
 
def foo(): 
    raise ValueError 
 
# test_wtf.py
#!/usr/bin/python 
 
from wtf import foo 
import unittest 
class Test(unittest.TestCase): 
    def test(self): 
        self.assertRaises(self, ValueError, foo()) 
 
if __name__ == '__main__': unittest.main() 
 

# output:cmd@cabbage ~/tmp $ ./test_wtf.py 
E
======================================================================
ERROR: test (__main__.Test)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "./test_wtf.py", line 7, in test
    self.assertRaises(self, ValueError, foo())
  File "/home/cmd/tmp/wtf.py", line 4, in foo
    raise ValueError
ValueError

----------------------------------------------------------------------
Ran 1 test in 0.001s

FAILED (errors=1)