def test_applicationStartsWithConfiguredNumericIDs(self):
        """
        L{postApplication} should change the UID and GID to the values
        specified as numeric strings by the configuration after running
        L{service.IService.privilegedStartService} and before running
        L{service.IService.startService}.
        """
        uid = 1234
        gid = 4321
        self._applicationStartsWithConfiguredID(
            ["--uid", str(uid), "--gid", str(gid)], uid, gid)

        L{postApplication} should change the UID and GID to the values
        specified as numeric strings by the configuration after running
        L{service.IService.privilegedStartService} and before running
        L{service.IService.startService}.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/test/test_twistd.py