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