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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙimport asyncio import unittest import time def tearDownModule(): asyncio.set_event_loop_policy(None) # The following value can be used as a very small timeout: # it passes check "timeout > 0", but has almost # no effect on the test performance _EPSILON = 0.0001 class SlowTask: """ Task will run for this defined time, ignoring cancel requests """ TASK_TIMEOUT = 0.2 def __init__(self): self.exited = False async def run(self): exitat = time.monotonic() + self.TASK_TIMEOUT while True: tosleep = exitat - time.monotonic() if tosleep <= 0: break try: await asyncio.sleep(tosleep) except asyncio.CancelledError: pass self.exited = True class AsyncioWaitForTest(unittest.IsolatedAsyncioTestCase): async def test_asyncio_wait_for_cancelled(self): t = SlowTask() waitfortask = asyncio.create_task( asyncio.wait_for(t.run(), t.TASK_TIMEOUT * 2)) await asyncio.sleep(0) waitfortask.cancel() await asyncio.wait({waitfortask}) self.assertTrue(t.exited) async def test_asyncio_wait_for_timeout(self): t = SlowTask() try: await asyncio.wait_for(t.run(), t.TASK_TIMEOUT / 2) except asyncio.TimeoutError: pass self.assertTrue(t.exited) async def test_wait_for_timeout_less_then_0_or_0_future_done(self): loop = asyncio.get_running_loop() fut = loop.create_future() fut.set_result('done') t0 = loop.time() ret = await asyncio.wait_for(fut, 0) t1 = loop.time() self.assertEqual(ret, 'done') self.assertTrue(fut.done()) self.assertLess(t1 - t0, 0.1) async def test_wait_for_timeout_less_then_0_or_0_coroutine_do_not_started(self): loop = asyncio.get_running_loop() foo_started = False async def foo(): nonlocal foo_started foo_started = True with self.assertRaises(asyncio.TimeoutError): t0 = loop.time() await asyncio.wait_for(foo(), 0) t1 = loop.time() self.assertEqual(foo_started, False) self.assertLess(t1 - t0, 0.1) async def test_wait_for_timeout_less_then_0_or_0(self): loop = asyncio.get_running_loop() for timeout in [0, -1]: with self.subTest(timeout=timeout): foo_running = None started = loop.create_future() async def foo(): nonlocal foo_running foo_running = True started.set_result(None) try: await asyncio.sleep(10) finally: foo_running = False return 'done' fut = asyncio.create_task(foo()) await started with self.assertRaises(asyncio.TimeoutError): t0 = loop.time() await asyncio.wait_for(fut, timeout) t1 = loop.time() self.assertTrue(fut.done()) # it should have been cancelled due to the timeout self.assertTrue(fut.cancelled()) self.assertEqual(foo_running, False) self.assertLess(t1 - t0, 0.1) async def test_wait_for(self): loop = asyncio.get_running_loop() foo_running = None async def foo(): nonlocal foo_running foo_running = True try: await asyncio.sleep(10) finally: foo_running = False return 'done' fut = asyncio.create_task(foo()) with self.assertRaises(asyncio.TimeoutError): t0 = loop.time() await asyncio.wait_for(fut, 0.1) t1 = loop.time() self.assertTrue(fut.done()) # it should have been cancelled due to the timeout self.assertTrue(fut.cancelled()) self.assertLess(t1 - t0, 0.5) self.assertEqual(foo_running, False) async def test_wait_for_blocking(self): async def coro(): return 'done' res = await asyncio.wait_for(coro(), timeout=None) self.assertEqual(res, 'done') async def test_wait_for_race_condition(self): loop = asyncio.get_running_loop() fut = loop.create_future() task = asyncio.wait_for(fut, timeout=0.2) loop.call_later(0.1, fut.set_result, "ok") res = await task self.assertEqual(res, "ok") async def test_wait_for_cancellation_race_condition(self): async def inner(): with self.assertRaises(asyncio.CancelledError): await asyncio.sleep(1) return 1 result = await asyncio.wait_for(inner(), timeout=.01) self.assertEqual(result, 1) async def test_wait_for_waits_for_task_cancellation(self): task_done = False async def inner(): nonlocal task_done try: await asyncio.sleep(10) except asyncio.CancelledError: await asyncio.sleep(_EPSILON) raise finally: task_done = True inner_task = asyncio.create_task(inner()) with self.assertRaises(asyncio.TimeoutError) as cm: await asyncio.wait_for(inner_task, timeout=_EPSILON) self.assertTrue(task_done) chained = cm.exception.__context__ self.assertEqual(type(chained), asyncio.CancelledError) async def test_wait_for_waits_for_task_cancellation_w_timeout_0(self): task_done = False async def foo(): async def inner(): nonlocal task_done try: await asyncio.sleep(10) except asyncio.CancelledError: await asyncio.sleep(_EPSILON) raise finally: task_done = True inner_task = asyncio.create_task(inner()) await asyncio.sleep(_EPSILON) await asyncio.wait_for(inner_task, timeout=0) with self.assertRaises(asyncio.TimeoutError) as cm: await foo() self.assertTrue(task_done) chained = cm.exception.__context__ self.assertEqual(type(chained), asyncio.CancelledError) async def test_wait_for_reraises_exception_during_cancellation(self): class FooException(Exception): pass async def foo(): async def inner(): try: await asyncio.sleep(0.2) finally: raise FooException inner_task = asyncio.create_task(inner()) await asyncio.wait_for(inner_task, timeout=_EPSILON) with self.assertRaises(FooException): await foo() async def test_wait_for_self_cancellation(self): async def inner(): try: await asyncio.sleep(0.3) except asyncio.CancelledError: try: await asyncio.sleep(0.3) except asyncio.CancelledError: await asyncio.sleep(0.3) return 42 inner_task = asyncio.create_task(inner()) wait = asyncio.wait_for(inner_task, timeout=0.1) # Test that wait_for itself is properly cancellable # even when the initial task holds up the initial cancellation. task = asyncio.create_task(wait) await asyncio.sleep(0.2) task.cancel() with self.assertRaises(asyncio.CancelledError): await task self.assertEqual(await inner_task, 42) async def _test_cancel_wait_for(self, timeout): loop = asyncio.get_running_loop() async def blocking_coroutine(): fut = loop.create_future() # Block: fut result is never set await fut task = asyncio.create_task(blocking_coroutine()) wait = asyncio.create_task(asyncio.wait_for(task, timeout)) loop.call_soon(wait.cancel) with self.assertRaises(asyncio.CancelledError): await wait # Python issue #23219: cancelling the wait must also cancel the task self.assertTrue(task.cancelled()) async def test_cancel_blocking_wait_for(self): await self._test_cancel_wait_for(None) async def test_cancel_wait_for(self): await self._test_cancel_wait_for(60.0) if __name__ == '__main__': unittest.main()