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# Copyright 2012, Red Hat, 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.
import threading
import warnings
import eventlet
from eventlet import greenthread
import mock
from oslotest import base as test_base
import six
from oslo_utils import eventletutils
class EventletUtilsTest(test_base.BaseTestCase):
def setUp(self):
super(EventletUtilsTest, self).setUp()
self._old_avail = eventletutils.EVENTLET_AVAILABLE
eventletutils.EVENTLET_AVAILABLE = True
def tearDown(self):
super(EventletUtilsTest, self).tearDown()
eventletutils.EVENTLET_AVAILABLE = self._old_avail
@mock.patch("oslo_utils.eventletutils._patcher")
def test_warning_not_patched(self, mock_patcher):
mock_patcher.already_patched = True
mock_patcher.is_monkey_patched.return_value = False
with warnings.catch_warnings(record=True) as capture:
warnings.simplefilter("always")
eventletutils.warn_eventlet_not_patched(['os'])
self.assertEqual(1, len(capture))
w = capture[0]
self.assertEqual(RuntimeWarning, w.category)
self.assertIn('os', six.text_type(w.message))
@mock.patch("oslo_utils.eventletutils._patcher")
def test_warning_not_patched_none_provided(self, mock_patcher):
mock_patcher.already_patched = True
mock_patcher.is_monkey_patched.return_value = False
with warnings.catch_warnings(record=True) as capture:
warnings.simplefilter("always")
eventletutils.warn_eventlet_not_patched()
self.assertEqual(1, len(capture))
w = capture[0]
self.assertEqual(RuntimeWarning, w.category)
for m in eventletutils._ALL_PATCH:
self.assertIn(m, six.text_type(w.message))
@mock.patch("oslo_utils.eventletutils._patcher")
def test_warning_not_patched_all(self, mock_patcher):
mock_patcher.already_patched = True
mock_patcher.is_monkey_patched.return_value = False
with warnings.catch_warnings(record=True) as capture:
warnings.simplefilter("always")
eventletutils.warn_eventlet_not_patched(['all'])
self.assertEqual(1, len(capture))
w = capture[0]
self.assertEqual(RuntimeWarning, w.category)
for m in eventletutils._ALL_PATCH:
self.assertIn(m, six.text_type(w.message))
@mock.patch("oslo_utils.eventletutils._patcher")
def test_no_warning(self, mock_patcher):
mock_patcher.already_patched = True
mock_patcher.is_monkey_patched.return_value = True
with warnings.catch_warnings(record=True) as capture:
warnings.simplefilter("always")
eventletutils.warn_eventlet_not_patched(['os'])
self.assertEqual(0, len(capture))
@mock.patch("oslo_utils.eventletutils._patcher")
def test_eventlet_is_patched(self, mock_patcher):
mock_patcher.is_monkey_patched.return_value = True
self.assertTrue(eventletutils.is_monkey_patched('os'))
mock_patcher.is_monkey_patched.return_value = False
self.assertFalse(eventletutils.is_monkey_patched('os'))
@mock.patch("oslo_utils.eventletutils._patcher", None)
def test_eventlet_no_patcher(self):
self.assertFalse(eventletutils.is_monkey_patched('os'))
@mock.patch("oslo_utils.eventletutils._patcher")
def test_partially_patched_warning(self, mock_patcher):
is_patched = set()
mock_patcher.already_patched = True
mock_patcher.is_monkey_patched.side_effect = lambda m: m in is_patched
with warnings.catch_warnings(record=True) as capture:
warnings.simplefilter("always")
eventletutils.warn_eventlet_not_patched(['os'])
self.assertEqual(1, len(capture))
is_patched.add('os')
with warnings.catch_warnings(record=True) as capture:
warnings.simplefilter("always")
eventletutils.warn_eventlet_not_patched(['os'])
self.assertEqual(0, len(capture))
is_patched.add('thread')
with warnings.catch_warnings(record=True) as capture:
warnings.simplefilter("always")
eventletutils.warn_eventlet_not_patched(['os', 'thread'])
self.assertEqual(0, len(capture))
with warnings.catch_warnings(record=True) as capture:
warnings.simplefilter("always")
eventletutils.warn_eventlet_not_patched(['all'])
self.assertEqual(1, len(capture))
w = capture[0]
self.assertEqual(RuntimeWarning, w.category)
for m in ['os', 'thread']:
self.assertNotIn(m, six.text_type(w.message))
def test_invalid_patch_check(self):
self.assertRaises(ValueError,
eventletutils.warn_eventlet_not_patched,
['blah.blah'])
@mock.patch('oslo_utils.eventletutils._eventlet')
def test_event_api_compat(self, mock_eventlet):
with mock.patch('oslo_utils.eventletutils.is_monkey_patched',
return_value=True):
e_event = eventletutils.Event()
self.assertIsInstance(e_event, eventletutils.EventletEvent)
t_event = eventletutils.Event()
if six.PY3:
t_event_cls = threading.Event
else:
t_event_cls = threading._Event
self.assertIsInstance(t_event, t_event_cls)
public_methods = [m for m in dir(t_event) if not m.startswith("_") and
callable(getattr(t_event, m))]
for method in public_methods:
self.assertTrue(hasattr(e_event, method))
# Ensure set() allows multiple invocations, same as in
# threading implementation.
e_event.set()
self.assertTrue(e_event.isSet())
e_event.set()
self.assertTrue(e_event.isSet())
def test_event_no_timeout(self):
event = eventletutils.EventletEvent()
def thread_a():
self.assertTrue(event.wait())
a = greenthread.spawn(thread_a)
with eventlet.timeout.Timeout(0.5, False):
a.wait()
self.fail('wait() timed out')
def test_event_race(self):
event = eventletutils.EventletEvent()
def thread_a():
self.assertTrue(event.wait(2))
a = greenthread.spawn(thread_a)
def thread_b():
eventlet.sleep(0.1)
event.clear()
event.set()
a.wait()
b = greenthread.spawn(thread_b)
with eventlet.timeout.Timeout(0.5):
b.wait()
def test_event_clear_timeout(self):
event = eventletutils.EventletEvent()
def thread_a():
self.assertFalse(event.wait(0.5))
a = greenthread.spawn(thread_a)
def thread_b():
eventlet.sleep(0.1)
event.clear()
eventlet.sleep(0.1)
event.clear()
a.wait()
b = greenthread.spawn(thread_b)
with eventlet.timeout.Timeout(0.7):
b.wait()
def test_event_set_clear_timeout(self):
event = eventletutils.EventletEvent()
wakes = []
def thread_func():
result = event.wait(0.2)
wakes.append(result)
if len(wakes) == 1:
self.assertTrue(result)
event.clear()
else:
self.assertFalse(result)
a = greenthread.spawn(thread_func)
b = greenthread.spawn(thread_func)
eventlet.sleep(0) # start threads
event.set()
with eventlet.timeout.Timeout(0.3):
a.wait()
b.wait()
self.assertFalse(event.is_set())
self.assertEqual([True, False], wakes)
@mock.patch('oslo_utils.eventletutils._eventlet.event.Event')
def test_event_clear_already_sent(self, mock_event):
old_event = mock.Mock()
new_event = mock.Mock()
mock_event.side_effect = [old_event, new_event]
event = eventletutils.EventletEvent()
event.set()
event.clear()
self.assertEqual(1, old_event.send.call_count)
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