def test_mockPTYSetUidInParent(self):
        """
        When spawning a child process with PTY and a UID different from the UID
        of the current process, the current process does not have its UID
        changed.
        """
        self.mockos.child = False
        cmd = b'/mock/ouch'

        d = defer.Deferred()
        p = TrivialProcessProtocol(d)
        oldPTYProcess = process.PTYProcess
        try:
            process.PTYProcess = DumbPTYProcess
            reactor.spawnProcess(p, cmd, [b'ouch'], env=None,
                                 usePTY=True, uid=8080)
        finally:
            process.PTYProcess = oldPTYProcess
        self.assertEqual(self.mockos.actions, [('fork', False), 'waitpid'])

        When spawning a child process with PTY and a UID different from the UID
        of the current process, the current process does not have its UID
        changed.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/test/test_process.py