# Copyright (c) 2016 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 mock
from six.moves import queue
import testtools
import unittest2

try:
    from ovs.db import idl  # noqa
except ImportError:
    raise unittest2.SkipTest(
        "Skip test since ovs requirement for PY3 doesn't support yet.")

from neutron.agent.ovsdb import api
from neutron.agent.ovsdb import impl_idl
from neutron.tests import base


class TransactionTestCase(base.BaseTestCase):
    def test_commit_raises_exception_on_timeout(self):
        with mock.patch.object(queue, 'Queue') as mock_queue:
            transaction = impl_idl.Transaction(mock.sentinel, mock.Mock(), 0)
            mock_queue.return_value.get.side_effect = queue.Empty
            with testtools.ExpectedException(api.TimeoutException):
                transaction.commit()
