159 lines
4.8 KiB
Python
159 lines
4.8 KiB
Python
# Copyright 2012-2014 MongoDB, Inc.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
"""Test the thread_util module."""
|
|
|
|
import gc
|
|
import sys
|
|
import threading
|
|
import time
|
|
from functools import partial
|
|
|
|
sys.path[0:0] = [""]
|
|
|
|
from pymongo import thread_util
|
|
from test import SkipTest, unittest
|
|
from test.utils import RendezvousThread
|
|
|
|
|
|
class TestIdent(unittest.TestCase):
|
|
def test_thread_ident(self):
|
|
# 1. Store main thread's id.
|
|
# 2. Start 2 child threads.
|
|
# 3. Store their values for Ident.get().
|
|
# 4. Children reach rendezvous point.
|
|
# 5. Children call Ident.watch().
|
|
# 6. One of the children calls Ident.unwatch().
|
|
# 7. Children terminate.
|
|
# 8. Assert that children got different ids from each other and from
|
|
# main, and assert watched child's callback was executed, and that
|
|
# unwatched child's callback was not.
|
|
|
|
if 'java' in sys.platform:
|
|
raise SkipTest("Can't rely on weakref callbacks in Jython")
|
|
|
|
ident = thread_util.ThreadIdent()
|
|
|
|
ids = set([ident.get()])
|
|
unwatched_id = []
|
|
done = set([ident.get()]) # Start with main thread's id.
|
|
died = set()
|
|
|
|
class WatchedThread(RendezvousThread):
|
|
def __init__(self, ident, state):
|
|
super(WatchedThread, self).__init__(state)
|
|
self._my_ident = ident
|
|
|
|
def before_rendezvous(self):
|
|
self.my_id = self._my_ident.get()
|
|
ids.add(self.my_id)
|
|
|
|
def after_rendezvous(self):
|
|
assert not self._my_ident.watching()
|
|
self._my_ident.watch(lambda ref: died.add(self.my_id))
|
|
assert self._my_ident.watching()
|
|
done.add(self.my_id)
|
|
|
|
class UnwatchedThread(WatchedThread):
|
|
def before_rendezvous(self):
|
|
super(UnwatchedThread, self).before_rendezvous()
|
|
unwatched_id.append(self.my_id)
|
|
|
|
def after_rendezvous(self):
|
|
super(UnwatchedThread, self).after_rendezvous()
|
|
self._my_ident.unwatch(self.my_id)
|
|
assert not self._my_ident.watching()
|
|
|
|
state = RendezvousThread.create_shared_state(2)
|
|
t_watched = WatchedThread(ident, state)
|
|
t_watched.start()
|
|
|
|
t_unwatched = UnwatchedThread(ident, state)
|
|
t_unwatched.start()
|
|
|
|
RendezvousThread.wait_for_rendezvous(state)
|
|
RendezvousThread.resume_after_rendezvous(state)
|
|
|
|
t_watched.join()
|
|
t_unwatched.join()
|
|
|
|
self.assertTrue(t_watched.passed)
|
|
self.assertTrue(t_unwatched.passed)
|
|
|
|
# Remove references, let weakref callbacks run
|
|
del t_watched
|
|
del t_unwatched
|
|
|
|
# Trigger final cleanup in Python <= 2.7.0.
|
|
# http://bugs.python.org/issue1868
|
|
ident.get()
|
|
self.assertEqual(3, len(ids))
|
|
self.assertEqual(3, len(done))
|
|
|
|
# Make sure thread is really gone
|
|
slept = 0
|
|
while not died and slept < 10:
|
|
time.sleep(1)
|
|
gc.collect()
|
|
slept += 1
|
|
|
|
self.assertEqual(1, len(died))
|
|
self.assertFalse(unwatched_id[0] in died)
|
|
|
|
|
|
class TestCounter(unittest.TestCase):
|
|
def test_counter(self):
|
|
counter = thread_util.Counter()
|
|
|
|
self.assertEqual(0, counter.dec())
|
|
self.assertEqual(0, counter.get())
|
|
self.assertEqual(0, counter.dec())
|
|
self.assertEqual(0, counter.get())
|
|
|
|
done = set()
|
|
|
|
def f(n):
|
|
for i in range(n):
|
|
self.assertEqual(i, counter.get())
|
|
self.assertEqual(i + 1, counter.inc())
|
|
|
|
for i in range(n, 0, -1):
|
|
self.assertEqual(i, counter.get())
|
|
self.assertEqual(i - 1, counter.dec())
|
|
|
|
self.assertEqual(0, counter.get())
|
|
|
|
# Extra decrements have no effect
|
|
self.assertEqual(0, counter.dec())
|
|
self.assertEqual(0, counter.get())
|
|
self.assertEqual(0, counter.dec())
|
|
self.assertEqual(0, counter.get())
|
|
|
|
done.add(n)
|
|
|
|
threads = [threading.Thread(target=partial(f, i))
|
|
for i in range(10)]
|
|
|
|
for t in threads:
|
|
t.start()
|
|
|
|
for t in threads:
|
|
t.join()
|
|
|
|
self.assertEqual(10, len(done))
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|