Source code for keystone.tests.unit.common.test_provider_api

# Copyright 2012 OpenStack Foundation
#
# 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 uuid

from keystone.common import manager
from keystone.common import provider_api
from keystone.tests import unit


[docs]class TestProviderAPIRegistry(unit.BaseTestCase):
[docs] def setUp(self): super(TestProviderAPIRegistry, self).setUp() provider_api.ProviderAPIs._clear_registry_instances() self.addCleanup(provider_api.ProviderAPIs._clear_registry_instances)
def _create_manager_instance(self, provides_api=None): provides_api = provides_api or '%s_api' % uuid.uuid4().hex class TestManager(manager.Manager): _provides_api = provides_api driver_namespace = '_TEST_NOTHING' def do_something(self): return provides_api return TestManager(driver_name=None)
[docs] def test_deferred_gettr(self): api_name = '%s_api' % uuid.uuid4().hex class TestClass(object): descriptor = provider_api.ProviderAPIs.deferred_provider_lookup( api=api_name, method='do_something') test_instance = TestClass() # Accessing the descriptor will raise the known "attribute" error self.assertRaises(AttributeError, getattr, test_instance, 'descriptor') self._create_manager_instance(provides_api=api_name) # once the provider has been instantiated, we can call the descriptor # which will return the method (callable) and we can check that the # return value is as expected. self.assertEqual(api_name, test_instance.descriptor())
[docs] def test_registry_lock(self): provider_api.ProviderAPIs.lock_provider_registry() self.assertRaises(RuntimeError, self._create_manager_instance)
[docs] def test_registry_duplicate(self): test_manager = self._create_manager_instance() self.assertRaises( provider_api.DuplicateProviderError, self._create_manager_instance, provides_api=test_manager._provides_api)
[docs] def test_provider_api_mixin(self): test_manager = self._create_manager_instance() class Testing(provider_api.ProviderAPIMixin, object): pass instance = Testing() self.assertIs(test_manager, getattr(instance, test_manager._provides_api))
[docs] def test_manager_api_reference(self): manager = self._create_manager_instance() second_manager = self._create_manager_instance() self.assertIs(second_manager, getattr(manager, second_manager._provides_api)) self.assertIs(manager, getattr(second_manager, manager._provides_api))