Question

No matter what I do sys.exit() is called by unittest, even the most trivial examples. I can’t tell if my install is messed up or what is going on.

IDLE 1.2.2      ==== No Subprocess ==== >>> import unittest >>>  >>> class Test(unittest.TestCase):         def testA(self):             a = 1             self.assertEqual(a,1)  >>> unittest.main() option -n not recognized Usage: idle.pyw [options] [test] [...]  Options:   -h, --help       Show this message   -v, --verbose    Verbose output   -q, --quiet      Minimal output   Examples:    idle.pyw                               - run default set of tests    idle.pyw MyTestSuite                   - run suite 'MyTestSuite'    idle.pyw MyTestCase.testSomething      - run MyTestCase.testSomething    idle.pyw MyTestCase                    - run all 'test*' test methods                                            in MyTestCase  Traceback (most recent call last):   File '<pyshell#7>', line 1, in <module>     unittest.main()   File 'E:\Python25\lib\unittest.py', line 767, in __init__     self.parseArgs(argv)   File 'E:\Python25\lib\unittest.py', line 796, in parseArgs     self.usageExit(msg)   File 'E:\Python25\lib\unittest.py', line 773, in usageExit     sys.exit(2) SystemExit: 2 >>>  

Answer 1

Your example is exiting on my install too. I can make it execute the tests and stay within Python by changing

unittest.main() 

to

unittest.TextTestRunner().run(unittest.TestLoader().loadTestsFromTestCase(Test)) 

More information is available here in the Python Library Reference.