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test_asyncio: run_until() implements exponential sleep (#93866)

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run_until() of test.test_asyncio.utils now uses an exponential sleep
delay (max: 1 second), rather than a fixed delay of 1 ms. Similar
design than support.sleeping_retry() wait strategy that applies
exponential backoff.
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Victor Stinner 2022-06-15 18:28:00 +02:00 committed by GitHub
parent 99be1cbeb3
commit 41fccd23e9
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1 changed files with 3 additions and 1 deletions
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4
Lib/test/test_asyncio/utils.py
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@ -109,10 +109,12 @@ async def once():
def run_until(loop, pred, timeout=support.SHORT_TIMEOUT):
delay = 0.001
for _ in support.busy_retry(timeout, error=False):
if pred():
break
loop.run_until_complete(tasks.sleep(0.001))
loop.run_until_complete(tasks.sleep(delay))
delay = max(delay * 2, 1.0)
else:
raise futures.TimeoutError()