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"""Tests for asyncio/timeouts.py"""
import unittest
import time
import asyncio
def tearDownModule():
asyncio.set_event_loop_policy(None)
class TimeoutTests(unittest.IsolatedAsyncioTestCase):
async def test_timeout_basic(self):
with self.assertRaises(TimeoutError):
async with asyncio.timeout(0.01) as cm:
await asyncio.sleep(10)
self.assertTrue(cm.expired())
async def test_timeout_at_basic(self):
loop = asyncio.get_running_loop()
with self.assertRaises(TimeoutError):
deadline = loop.time() + 0.01
async with asyncio.timeout_at(deadline) as cm:
await asyncio.sleep(10)
self.assertTrue(cm.expired())
self.assertEqual(deadline, cm.when())
async def test_nested_timeouts(self):
loop = asyncio.get_running_loop()
cancelled = False
with self.assertRaises(TimeoutError):
deadline = loop.time() + 0.01
async with asyncio.timeout_at(deadline) as cm1:
# Only the topmost context manager should raise TimeoutError
try:
async with asyncio.timeout_at(deadline) as cm2:
await asyncio.sleep(10)
except asyncio.CancelledError:
cancelled = True
raise
self.assertTrue(cancelled)
self.assertTrue(cm1.expired())
self.assertTrue(cm2.expired())
async def test_waiter_cancelled(self):
loop = asyncio.get_running_loop()
cancelled = False
with self.assertRaises(TimeoutError):
async with asyncio.timeout(0.01):
try:
await asyncio.sleep(10)
except asyncio.CancelledError:
cancelled = True
raise
self.assertTrue(cancelled)
async def test_timeout_not_called(self):
loop = asyncio.get_running_loop()
t0 = loop.time()
async with asyncio.timeout(10) as cm:
await asyncio.sleep(0.01)
t1 = loop.time()
self.assertFalse(cm.expired())
# 2 sec for slow CI boxes
self.assertLess(t1-t0, 2)
self.assertGreater(cm.when(), t1)
async def test_timeout_disabled(self):
loop = asyncio.get_running_loop()
t0 = loop.time()
async with asyncio.timeout(None) as cm:
await asyncio.sleep(0.01)
t1 = loop.time()
self.assertFalse(cm.expired())
self.assertIsNone(cm.when())
# 2 sec for slow CI boxes
self.assertLess(t1-t0, 2)
async def test_timeout_at_disabled(self):
loop = asyncio.get_running_loop()
t0 = loop.time()
async with asyncio.timeout_at(None) as cm:
await asyncio.sleep(0.01)
t1 = loop.time()
self.assertFalse(cm.expired())
self.assertIsNone(cm.when())
# 2 sec for slow CI boxes
self.assertLess(t1-t0, 2)
async def test_timeout_zero(self):
loop = asyncio.get_running_loop()
t0 = loop.time()
with self.assertRaises(TimeoutError):
async with asyncio.timeout(0) as cm:
await asyncio.sleep(10)
t1 = loop.time()
self.assertTrue(cm.expired())
# 2 sec for slow CI boxes
self.assertLess(t1-t0, 2)
self.assertTrue(t0 <= cm.when() <= t1)
async def test_timeout_zero_sleep_zero(self):
loop = asyncio.get_running_loop()
t0 = loop.time()
with self.assertRaises(TimeoutError):
async with asyncio.timeout(0) as cm:
await asyncio.sleep(0)
t1 = loop.time()
self.assertTrue(cm.expired())
# 2 sec for slow CI boxes
self.assertLess(t1-t0, 2)
self.assertTrue(t0 <= cm.when() <= t1)
async def test_timeout_in_the_past_sleep_zero(self):
loop = asyncio.get_running_loop()
t0 = loop.time()
with self.assertRaises(TimeoutError):
async with asyncio.timeout(-11) as cm:
await asyncio.sleep(0)
t1 = loop.time()
self.assertTrue(cm.expired())
# 2 sec for slow CI boxes
self.assertLess(t1-t0, 2)
self.assertTrue(t0 >= cm.when() <= t1)
async def test_foreign_exception_passed(self):
with self.assertRaises(KeyError):
async with asyncio.timeout(0.01) as cm:
raise KeyError
self.assertFalse(cm.expired())
async def test_foreign_exception_on_timeout(self):
async def crash():
try:
await asyncio.sleep(1)
finally:
1/0
with self.assertRaises(ZeroDivisionError):
async with asyncio.timeout(0.01):
await crash()
async def test_foreign_cancel_doesnt_timeout_if_not_expired(self):
with self.assertRaises(asyncio.CancelledError):
async with asyncio.timeout(10) as cm:
asyncio.current_task().cancel()
await asyncio.sleep(10)
self.assertFalse(cm.expired())
async def test_outer_task_is_not_cancelled(self):
async def outer() -> None:
with self.assertRaises(TimeoutError):
async with asyncio.timeout(0.001):
await asyncio.sleep(10)
task = asyncio.create_task(outer())
await task
self.assertFalse(task.cancelled())
self.assertTrue(task.done())
async def test_nested_timeouts_concurrent(self):
with self.assertRaises(TimeoutError):
async with asyncio.timeout(0.002):
with self.assertRaises(TimeoutError):
async with asyncio.timeout(0.1):
# Pretend we crunch some numbers.
time.sleep(0.01)
await asyncio.sleep(1)
async def test_nested_timeouts_loop_busy(self):
# After the inner timeout is an expensive operation which should
# be stopped by the outer timeout.
loop = asyncio.get_running_loop()
# Disable a message about long running task
loop.slow_callback_duration = 10
t0 = loop.time()
with self.assertRaises(TimeoutError):
async with asyncio.timeout(0.1): # (1)
with self.assertRaises(TimeoutError):
async with asyncio.timeout(0.01): # (2)
# Pretend the loop is busy for a while.
time.sleep(0.1)
await asyncio.sleep(1)
# TimeoutError was cought by (2)
await asyncio.sleep(10) # This sleep should be interrupted by (1)
t1 = loop.time()
self.assertTrue(t0 <= t1 <= t0 + 1)
async def test_reschedule(self):
loop = asyncio.get_running_loop()
fut = loop.create_future()
deadline1 = loop.time() + 10
deadline2 = deadline1 + 20
async def f():
async with asyncio.timeout_at(deadline1) as cm:
fut.set_result(cm)
await asyncio.sleep(50)
task = asyncio.create_task(f())
cm = await fut
self.assertEqual(cm.when(), deadline1)
cm.reschedule(deadline2)
self.assertEqual(cm.when(), deadline2)
cm.reschedule(None)
self.assertIsNone(cm.when())
task.cancel()
with self.assertRaises(asyncio.CancelledError):
await task
self.assertFalse(cm.expired())
async def test_repr_active(self):
async with asyncio.timeout(10) as cm:
self.assertRegex(repr(cm), r"<Timeout \[active\] when=\d+\.\d*>")
async def test_repr_expired(self):
with self.assertRaises(TimeoutError):
async with asyncio.timeout(0.01) as cm:
await asyncio.sleep(10)
self.assertEqual(repr(cm), "<Timeout [expired]>")
async def test_repr_finished(self):
async with asyncio.timeout(10) as cm:
await asyncio.sleep(0)
self.assertEqual(repr(cm), "<Timeout [finished]>")
async def test_repr_disabled(self):
async with asyncio.timeout(None) as cm:
self.assertEqual(repr(cm), r"<Timeout [active] when=None>")
async def test_nested_timeout_in_finally(self):
with self.assertRaises(TimeoutError):
async with asyncio.timeout(0.01):
try:
await asyncio.sleep(1)
finally:
with self.assertRaises(TimeoutError):
async with asyncio.timeout(0.01):
await asyncio.sleep(10)
if __name__ == '__main__':
unittest.main()
|
