a6007a98b1
The final step in cleaning up our many base classes. This will allow us to do things consistently across the test suite in future changes. Change-Id: I0bf663fdfd3c8be93e5658493e221d0a7db78832 Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
113 lines
4.2 KiB
Python
113 lines
4.2 KiB
Python
# Copyright 2014 Mirantis.inc
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import sys
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from unittest import mock
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from oslo_config import fixture as config_fixture
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from oslo_db import concurrency
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from oslo_db.tests import base as test_base
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FAKE_BACKEND_MAPPING = {'sqlalchemy': 'fake.db.sqlalchemy.api'}
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class TpoolDbapiWrapperTestCase(test_base.BaseTestCase):
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def setUp(self):
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super(TpoolDbapiWrapperTestCase, self).setUp()
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self.conf = self.useFixture(config_fixture.Config()).conf
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self.db_api = concurrency.TpoolDbapiWrapper(
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conf=self.conf, backend_mapping=FAKE_BACKEND_MAPPING)
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# NOTE(akurilin): We are not going to add `eventlet` to `oslo_db` in
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# requirements (`requirements.txt` and `test-requirements.txt`) due to
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# the following reasons:
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# - supporting of eventlet's thread pooling is totally optional;
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# - we don't need to test `tpool.Proxy` functionality itself,
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# because it's a tool from the third party library;
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# - `eventlet` would prevent us from running unit tests on Python 3.x
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# versions, because it doesn't support them yet.
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#
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# As we don't test `tpool.Proxy`, we can safely mock it in tests.
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self.proxy = mock.MagicMock()
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self.eventlet = mock.MagicMock()
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self.eventlet.tpool.Proxy.return_value = self.proxy
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sys.modules['eventlet'] = self.eventlet
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self.addCleanup(sys.modules.pop, 'eventlet', None)
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@mock.patch('oslo_db.api.DBAPI')
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def test_db_api_common(self, mock_db_api):
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# test context:
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# CONF.database.use_tpool == False
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# eventlet is installed
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# expected result:
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# TpoolDbapiWrapper should wrap DBAPI
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fake_db_api = mock.MagicMock()
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mock_db_api.from_config.return_value = fake_db_api
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# get access to some db-api method
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self.db_api.fake_call_1
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mock_db_api.from_config.assert_called_once_with(
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conf=self.conf, backend_mapping=FAKE_BACKEND_MAPPING)
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self.assertEqual(fake_db_api, self.db_api._db_api)
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self.assertFalse(self.eventlet.tpool.Proxy.called)
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# get access to other db-api method to be sure that api didn't changed
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self.db_api.fake_call_2
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self.assertEqual(fake_db_api, self.db_api._db_api)
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self.assertFalse(self.eventlet.tpool.Proxy.called)
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self.assertEqual(1, mock_db_api.from_config.call_count)
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@mock.patch('oslo_db.api.DBAPI')
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def test_db_api_config_change(self, mock_db_api):
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# test context:
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# CONF.database.use_tpool == True
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# eventlet is installed
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# expected result:
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# TpoolDbapiWrapper should wrap tpool proxy
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fake_db_api = mock.MagicMock()
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mock_db_api.from_config.return_value = fake_db_api
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self.conf.set_override('use_tpool', True, group='database')
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# get access to some db-api method
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self.db_api.fake_call
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# CONF.database.use_tpool is True, so we get tpool proxy in this case
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mock_db_api.from_config.assert_called_once_with(
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conf=self.conf, backend_mapping=FAKE_BACKEND_MAPPING)
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self.eventlet.tpool.Proxy.assert_called_once_with(fake_db_api)
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self.assertEqual(self.proxy, self.db_api._db_api)
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@mock.patch('oslo_db.api.DBAPI')
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def test_db_api_without_installed_eventlet(self, mock_db_api):
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# test context:
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# CONF.database.use_tpool == True
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# eventlet is not installed
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# expected result:
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# raise ImportError
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self.conf.set_override('use_tpool', True, group='database')
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sys.modules['eventlet'] = None
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self.assertRaises(ImportError, getattr, self.db_api, 'fake')
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