69 lines
1.7 KiB
Python
69 lines
1.7 KiB
Python
# Test asyncio.wait_for, with forwarding cancellation
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try:
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import asyncio
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except ImportError:
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print("SKIP")
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raise SystemExit
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async def foo():
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return 42
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try:
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foo().__await__
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except AttributeError:
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print("SKIP")
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raise SystemExit
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async def awaiting(t, return_if_fail):
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try:
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print("awaiting started")
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await asyncio.sleep(t)
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except asyncio.CancelledError as er:
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# CPython wait_for raises CancelledError inside task but TimeoutError in wait_for
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print("awaiting canceled")
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if return_if_fail:
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return False # return has no effect if Cancelled
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else:
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raise er
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except Exception as er:
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print("caught exception", er)
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raise er
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async def test_cancellation_forwarded(catch, catch_inside):
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print("----------")
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async def wait():
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try:
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await asyncio.wait_for(awaiting(2, catch_inside), 1)
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except asyncio.TimeoutError as er:
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print("Got timeout error")
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raise er
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except asyncio.CancelledError as er:
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print("Got canceled")
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if not catch:
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raise er
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async def cancel(t):
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print("cancel started")
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await asyncio.sleep(0.01)
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print("cancel wait()")
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t.cancel()
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t = asyncio.create_task(wait())
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k = asyncio.create_task(cancel(t))
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try:
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await t
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except asyncio.CancelledError:
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print("waiting got cancelled")
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asyncio.run(test_cancellation_forwarded(False, False))
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asyncio.run(test_cancellation_forwarded(False, True))
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asyncio.run(test_cancellation_forwarded(True, True))
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asyncio.run(test_cancellation_forwarded(True, False))
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