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# Copyright 2016 Mellanox Technologies, Ltd
# All Rights Reserved.
#
# 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 mock
import threading
from neutron.tests.unit import testlib_api
from neutron_lib.db import api as neutron_db_api
from networking_mlnx.db.models import sdn_maintenance_db
from networking_mlnx.journal import maintenance
from networking_mlnx.plugins.ml2.drivers.sdn import constants as sdn_const
class MaintenanceThreadTestCase(testlib_api.SqlTestCaseLight):
def setUp(self):
super(MaintenanceThreadTestCase, self).setUp()
self.db_session = neutron_db_api.get_writer_session()
row = sdn_maintenance_db.SdnMaintenance(state=sdn_const.PENDING)
self.db_session.add(row)
self.db_session.flush()
self.thread = maintenance.MaintenanceThread()
self.thread.maintenance_interval = 0.01
def test__execute_op_no_exception(self):
with mock.patch.object(maintenance, 'LOG') as mock_log:
operation = mock.MagicMock()
operation.__name__ = "test"
self.thread._execute_op(operation, self.db_session)
self.assertTrue(operation.called)
self.assertTrue(mock_log.info.called)
self.assertFalse(mock_log.exception.called)
def test__execute_op_with_exception(self):
with mock.patch.object(maintenance, 'LOG') as mock_log:
operation = mock.MagicMock(side_effect=Exception())
operation.__name__ = "test"
self.thread._execute_op(operation, self.db_session)
self.assertTrue(mock_log.exception.called)
def test_thread_works(self):
callback_event = threading.Event()
count = [0]
def callback_op(**kwargs):
count[0] += 1
# The following should be true on the second call, so we're making
# sure that the thread runs more than once.
if count[0] > 1:
callback_event.set()
self.thread.register_operation(callback_op)
self.thread.start()
# Make sure the callback event was called and not timed out
self.assertTrue(callback_event.wait(timeout=5))
def test_thread_continues_after_exception(self):
exception_event = threading.Event()
callback_event = threading.Event()
def exception_op(**kwargs):
if not exception_event.is_set():
exception_event.set()
raise Exception()
def callback_op(**kwargs):
callback_event.set()
for op in [exception_op, callback_op]:
self.thread.register_operation(op)
self.thread.start()
# Make sure the callback event was called and not timed out
self.assertTrue(callback_event.wait(timeout=5))
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