def test_getProcessValueDefaultPath(self):
        """
        If no value is supplied for the C{path} parameter, L{getProcessValue}
        runs the given command in the same working directory as the parent
        process and succeeds even if the current working directory is not
        accessible.
        """
        def check(result, ignored):
            self.assertEqual(result, 0)
        return self._defaultPathTest(utils.getProcessValue, check)

        If no value is supplied for the C{path} parameter, L{getProcessValue}
        runs the given command in the same working directory as the parent
        process and succeeds even if the current working directory is not
        accessible.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/test/test_iutils.py