Method test_close

Lib/test/_test_multiprocessing.py:760–790

(self)

    @warnings_helper.ignore_fork_in_thread_deprecation_warnings()
    def test_close(self):
        if self.TYPE == "threads":
            self.skipTest('test not appropriate for {}'.format(self.TYPE))
        q = self.Queue()
        p = self.Process(target=self._test_close, kwargs={'q': q})
        p.daemon = True
        p.start()
        self.assertEqual(p.is_alive(), True)
        # Child is still alive, cannot close
        with self.assertRaises(ValueError):
            p.close()

        q.put(None)
        p.join()
        self.assertEqual(p.is_alive(), False)
        self.assertEqual(p.exitcode, 0)
        p.close()
        with self.assertRaises(ValueError):
            p.is_alive()
        with self.assertRaises(ValueError):
            p.join()
        with self.assertRaises(ValueError):
            p.terminate()
        p.close()

        wr = weakref.ref(p)
        del p
        gc.collect()
        self.assertIs(wr(), None)

        close_queue(q)

    @warnings_helper.ignore_fork_in_thread_deprecation_warnings()
    @support.requires_resource('walltime')