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140 lines
4.8 KiB
140 lines
4.8 KiB
# Copyright (c) 2018 gevent community
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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import time
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import gevent
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from . import sysinfo
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from . import leakcheck
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from .testcase import TestCase
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SMALLEST_RELIABLE_DELAY = 0.001 # 1ms, because of libuv
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SMALL_TICK = 0.01
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SMALL_TICK_MIN_ADJ = SMALLEST_RELIABLE_DELAY
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SMALL_TICK_MAX_ADJ = 0.11
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if sysinfo.RUNNING_ON_APPVEYOR:
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# Timing resolution is extremely poor on Appveyor
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# and subject to jitter.
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SMALL_TICK_MAX_ADJ = 1.5
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LARGE_TICK = 0.2
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LARGE_TICK_MIN_ADJ = LARGE_TICK / 2.0
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LARGE_TICK_MAX_ADJ = SMALL_TICK_MAX_ADJ
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class _DelayWaitMixin(object):
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_default_wait_timeout = SMALL_TICK
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_default_delay_min_adj = SMALL_TICK_MIN_ADJ
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_default_delay_max_adj = SMALL_TICK_MAX_ADJ
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def wait(self, timeout):
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raise NotImplementedError('override me in subclass')
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def _check_delay_bounds(self, timeout, delay,
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delay_min_adj=None,
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delay_max_adj=None):
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delay_min_adj = self._default_delay_min_adj if not delay_min_adj else delay_min_adj
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delay_max_adj = self._default_delay_max_adj if not delay_max_adj else delay_max_adj
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self.assertTimeWithinRange(delay,
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timeout - delay_min_adj,
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timeout + delay_max_adj)
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def _wait_and_check(self, timeout=None):
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if timeout is None:
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timeout = self._default_wait_timeout
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# gevent.timer instances have a 'seconds' attribute,
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# otherwise it's the raw number
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seconds = getattr(timeout, 'seconds', timeout)
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gevent.get_hub().loop.update_now()
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start = time.time()
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try:
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result = self.wait(timeout)
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finally:
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self._check_delay_bounds(seconds, time.time() - start,
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self._default_delay_min_adj,
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self._default_delay_max_adj)
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return result
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def test_outer_timeout_is_not_lost(self):
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timeout = gevent.Timeout.start_new(SMALLEST_RELIABLE_DELAY, ref=False)
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try:
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with self.assertRaises(gevent.Timeout) as exc:
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self.wait(timeout=1)
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self.assertIs(exc.exception, timeout)
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finally:
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timeout.close()
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class AbstractGenericWaitTestCase(_DelayWaitMixin, TestCase):
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# pylint:disable=abstract-method
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_default_wait_timeout = LARGE_TICK
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_default_delay_min_adj = LARGE_TICK_MIN_ADJ
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_default_delay_max_adj = LARGE_TICK_MAX_ADJ
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@leakcheck.ignores_leakcheck # waiting checks can be very sensitive to timing
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def test_returns_none_after_timeout(self):
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result = self._wait_and_check()
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# join and wait simply return after timeout expires
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self.assertIsNone(result)
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class AbstractGenericGetTestCase(_DelayWaitMixin, TestCase):
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# pylint:disable=abstract-method
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Timeout = gevent.Timeout
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def cleanup(self):
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pass
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def test_raises_timeout_number(self):
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with self.assertRaises(self.Timeout):
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self._wait_and_check(timeout=SMALL_TICK)
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# get raises Timeout after timeout expired
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self.cleanup()
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def test_raises_timeout_Timeout(self):
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timeout = gevent.Timeout(self._default_wait_timeout)
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try:
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self._wait_and_check(timeout=timeout)
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except gevent.Timeout as ex:
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self.assertIs(ex, timeout)
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finally:
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timeout.close()
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self.cleanup()
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def test_raises_timeout_Timeout_exc_customized(self):
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error = RuntimeError('expected error')
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timeout = gevent.Timeout(self._default_wait_timeout, exception=error)
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try:
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with self.assertRaises(RuntimeError) as exc:
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self._wait_and_check(timeout=timeout)
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self.assertIs(exc.exception, error)
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self.cleanup()
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finally:
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timeout.close()
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