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gh-130730: Fix multiprocessing test_active_children() (#130837)

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Replace a sleep with an event: sleep is not a reliable
synchronization primitive.
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Victor Stinner 2025-03-04 18:05:20 +01:00 • committed by GitHub
parent 885c3d126f
commit 3dd3675492
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1 changed files with 8 additions and 4 deletions
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12
Lib/test/_test_multiprocessing.py
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@ -589,12 +589,16 @@ class _TestProcess(BaseTestCase):
def test_active_children(self):
self.assertEqual(type(self.active_children()), list)
p = self.Process(target=time.sleep, args=(DELTA,))
event = self.Event()
p = self.Process(target=event.wait, args=())
self.assertNotIn(p, self.active_children())
p.daemon = True
p.start()
self.assertIn(p, self.active_children())
try:
p.daemon = True
p.start()
self.assertIn(p, self.active_children())
finally:
event.set()
p.join()
self.assertNotIn(p, self.active_children())