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# Copyright (c) 2008 AG Projects
# Author: Denis Bilenko
#
# 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.
from __future__ import with_statement
import sys
import greentest
import weakref
import time
from gevent import sleep, Timeout
DELAY = 0.04
class Error(Exception):
pass
class Test(greentest.TestCase):
def test_api(self):
# Nothing happens if with-block finishes before the timeout expires
t = Timeout(DELAY * 2)
assert not t.pending, repr(t)
with t:
assert t.pending, repr(t)
sleep(DELAY)
# check if timer was actually cancelled
assert not t.pending, repr(t)
sleep(DELAY * 2)
# An exception will be raised if it's not
try:
with Timeout(DELAY) as t:
sleep(DELAY * 2)
except Timeout:
ex = sys.exc_info()[1]
assert ex is t, (ex, t)
else:
raise AssertionError('must raise Timeout')
# You can customize the exception raised:
try:
with Timeout(DELAY, IOError("Operation takes way too long")):
sleep(DELAY * 2)
except IOError:
ex = sys.exc_info()[1]
assert str(ex) == "Operation takes way too long", repr(ex)
# Providing classes instead of values should be possible too:
try:
with Timeout(DELAY, ValueError):
sleep(DELAY * 2)
except ValueError:
pass
try:
1 / 0
except:
try:
with Timeout(DELAY, sys.exc_info()[0]):
sleep(DELAY * 2)
raise AssertionError('should not get there')
raise AssertionError('should not get there')
except ZeroDivisionError:
pass
else:
raise AssertionError('should not get there')
# It's possible to cancel the timer inside the block:
with Timeout(DELAY) as timer:
timer.cancel()
sleep(DELAY * 2)
# To silent the exception before exiting the block, pass False as second parameter.
XDELAY = 0.1
start = time.time()
with Timeout(XDELAY, False):
sleep(XDELAY * 2)
delta = (time.time() - start)
assert delta < XDELAY * 2, delta
# passing None as seconds disables the timer
with Timeout(None):
sleep(DELAY)
sleep(DELAY)
def test_ref(self):
err = Error()
err_ref = weakref.ref(err)
with Timeout(DELAY * 2, err):
sleep(DELAY)
del err
assert not err_ref(), repr(err_ref())
def test_nested_timeout(self):
with Timeout(DELAY, False):
with Timeout(DELAY * 2, False):
sleep(DELAY * 3)
raise AssertionError('should not get there')
with Timeout(DELAY) as t1:
with Timeout(DELAY * 2) as t2:
try:
sleep(DELAY * 3)
except Timeout:
ex = sys.exc_info()[1]
assert ex is t1, (ex, t1)
assert not t1.pending, t1
assert t2.pending, t2
assert not t2.pending, t2
with Timeout(DELAY * 2) as t1:
with Timeout(DELAY) as t2:
try:
sleep(DELAY * 3)
except Timeout:
ex = sys.exc_info()[1]
assert ex is t2, (ex, t2)
assert t1.pending, t1
assert not t2.pending, t2
assert not t1.pending, t1
if __name__ == '__main__':
greentest.main()
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