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[3.13] gh-130737: Fix multiprocessing test_notify() (GH-130797) #130802

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Merged
merged 1 commit into from
Mar 3, 2025
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[3.13] gh-130737: Fix multiprocessing test_notify() (GH-130797) #130802

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14 changes: 5 additions & 9 deletions Lib/test/_test_multiprocessing.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1577,14 +1577,13 @@ def f(cls, cond, sleeping, woken, timeout=None):
cond.release()

def assertReachesEventually(self, func, value):
for i in range(10):
for _ in support.sleeping_retry(support.SHORT_TIMEOUT):
try:
if func() == value:
break
except NotImplementedError:
break
time.sleep(DELTA)
time.sleep(DELTA)

self.assertReturnsIfImplemented(value, func)

def check_invariant(self, cond):
Expand Down Expand Up @@ -1618,26 +1617,23 @@ def test_notify(self):
sleeping.acquire()

# check no process/thread has woken up
time.sleep(DELTA)
self.assertReturnsIfImplemented(0, get_value, woken)
self.assertReachesEventually(lambda: get_value(woken), 0)

# wake up one process/thread
cond.acquire()
cond.notify()
cond.release()

# check one process/thread has woken up
time.sleep(DELTA)
self.assertReturnsIfImplemented(1, get_value, woken)
self.assertReachesEventually(lambda: get_value(woken), 1)

# wake up another
cond.acquire()
cond.notify()
cond.release()

# check other has woken up
time.sleep(DELTA)
self.assertReturnsIfImplemented(2, get_value, woken)
self.assertReachesEventually(lambda: get_value(woken), 2)

# check state is not mucked up
self.check_invariant(cond)
Expand Down
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