Implement base classes for Openstack clients
Change-Id: I766f952ec19660bf24d6ee37fe76b15a94324206
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# Copyright 2019 Red Hat
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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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from __future__ import absolute_import
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import abc
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import fixtures
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from oslo_log import log
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import tobiko
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from tobiko.openstack import keystone
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LOG = log.getLogger(__name__)
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class OpenstackClientFixture(tobiko.SharedFixture):
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client = None
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session = None
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session_fixture = None
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def __init__(self, session=None):
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super(OpenstackClientFixture, self).__init__()
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if session:
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if tobiko.is_fixture(session):
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self.session_fixture = session
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else:
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self.session = session
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def setup_fixture(self):
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self.setup_session()
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self.setup_client()
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def setup_session(self):
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session_fixture = self.session_fixture
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if session_fixture:
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if not isinstance(session_fixture, fixtures.Fixture):
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session_fixture = tobiko.get_fixture(session_fixture)
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session_fixture.setUp()
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self.session = session_fixture.session
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elif not self.session:
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self.session = keystone.get_keystone_session()
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def setup_client(self):
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self.client = self.init_client(session=self.session)
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@abc.abstractmethod
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def init_client(self, session):
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raise NotImplementedError
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class OpenstackClientManager(object):
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def __init__(self, init_client=None):
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self._clients = {}
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self.init_client = init_client
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def get_client(self, session=None, shared=True, init_client=None):
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if shared:
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if session and tobiko.is_fixture(session):
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key = tobiko.get_fixture_name(session)
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else:
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key = session
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client = self._clients.get(key)
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if client:
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return client
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session = session or keystone.get_keystone_session()
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init_client = init_client or self.init_client
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assert callable(init_client)
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LOG.debug('Initialize OpenStack client: %r(session=%r)',
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init_client, session)
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client = init_client(session=session)
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if shared:
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self._clients[key] = client
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return client
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# Copyright (c) 2019 Red Hat
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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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from __future__ import absolute_import
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import inspect
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import mock
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import tobiko
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from tobiko.openstack import client as _client
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from tobiko.openstack import keystone
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from tobiko.tests.openstack import base
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CLIENT = object()
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class ClientFixture(_client.OpenstackClientFixture):
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def init_client(self, session=None):
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return CLIENT
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SESSION = object()
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DEFAULT_SESSION = object()
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class SessionFixture(tobiko.SharedFixture):
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session = None
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def setup_fixture(self):
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self.session = SESSION
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class OpenstackClientFixtureTest(base.OpenstackTest):
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def create_client(self, session=None):
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return ClientFixture(session=session)
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def test_init(self, session=None):
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client = self.create_client(session=session)
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self.check_client_session(client=client, session=session)
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def test_init_with_credentials(self):
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self.test_init(session=SESSION)
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def test_init_with_credentials_fixture(self):
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self.test_init(session=keystone.KeystoneSessionFixture())
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def test_init_with_credentials_fixture_type(self):
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self.test_init(session=keystone.KeystoneSessionFixture)
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def test_setup(self, session=None):
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client = self.create_client(session=session)
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client.setUp()
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if session:
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if tobiko.is_fixture(session):
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if inspect.isclass(session):
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session = tobiko.get_fixture(session)
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self.assertIs(session.session, client.session)
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else:
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self.assertIs(session, client.session)
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else:
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self.assertIs(keystone.get_keystone_session(), client.session)
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def test_setup_with_session(self):
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self.test_setup(session=SESSION)
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def test_setup_with_session_fixture(self):
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self.test_setup(session=SessionFixture())
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def test_setup_with_session_fixture_type(self):
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self.test_setup(session=SessionFixture)
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def check_client_session(self, client, session):
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if session:
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if tobiko.is_fixture(session):
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self.assertIsNone(client.session)
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self.assertIs(session, client.session_fixture)
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else:
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self.assertIs(session, client.session)
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self.assertIsNone(client.session_fixture)
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else:
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self.assertIsNone(client.session)
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self.assertIsNone(client.session_fixture)
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class OpenstackClientManagerTest(base.OpenstackTest):
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def setUp(self):
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super(OpenstackClientManagerTest, self).setUp()
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self.patch('tobiko.openstack.keystone.get_keystone_session',
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return_value=DEFAULT_SESSION)
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def test_init(self, init_client=None):
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manager = _client.OpenstackClientManager(init_client=init_client)
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self.assertIs(init_client, manager.init_client)
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def test_init_with_init_client(self):
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self.test_init(init_client=ClientFixture)
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def test_get_client(self, session=None, shared=True):
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default_init_client = mock.MagicMock(side_effect=ClientFixture)
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manager = _client.OpenstackClientManager(
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init_client=default_init_client)
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client1 = manager.get_client(session=session, shared=shared)
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client2 = manager.get_client(session=session, shared=shared)
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if shared:
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self.assertIs(client1, client2)
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default_init_client.assert_called_once_with(
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session=(session or DEFAULT_SESSION))
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else:
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self.assertIsNot(client1, client2)
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default_init_client.assert_has_calls(
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[mock.call(session=(session or DEFAULT_SESSION))] * 2)
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def test_get_client_with_not_shared(self):
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self.test_get_client(shared=False)
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def test_get_client_with_session(self):
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self.test_get_client(session=SESSION)
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def test_get_client_with_session_fixture(self):
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self.test_get_client(session=SessionFixture())
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def test_get_client_with_session_fixture_type(self):
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self.test_get_client(session=SessionFixture)
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def test_get_client_with_init_client(self):
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init_client = mock.MagicMock(return_value=CLIENT)
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manager = _client.OpenstackClientManager()
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client = manager.get_client(session=SESSION,
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init_client=init_client)
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self.assertIs(CLIENT, client)
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init_client.assert_called_once_with(session=SESSION)
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