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# Copyright 2012 OpenStack Foundation
# 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 importlib
import inspect
from unittest import mock
import stevedore
from stevedore import extension
from novaclient import client
from novaclient.tests.unit import utils
class DiscoverTest(utils.TestCase):
def test_discover_via_entry_points(self):
def mock_mgr():
fake_ep = mock.Mock()
fake_ep.name = 'foo'
module_spec = importlib.machinery.ModuleSpec('foo', None)
fake_ep.module = importlib.util.module_from_spec(module_spec)
fake_ep.load.return_value = fake_ep.module
fake_ext = extension.Extension(
name='foo',
entry_point=fake_ep,
plugin=fake_ep.module,
obj=None,
)
return stevedore.ExtensionManager.make_test_instance([fake_ext])
@mock.patch.object(client, '_make_discovery_manager', mock_mgr)
def test():
for name, module in client._discover_via_entry_points():
self.assertEqual('foo', name)
self.assertTrue(inspect.ismodule(module))
test()
def test_discover_extensions(self):
def mock_discover_via_python_path():
module_spec = importlib.machinery.ModuleSpec('foo', None)
module = importlib.util.module_from_spec(module_spec)
yield 'foo', module
def mock_discover_via_entry_points():
module_spec = importlib.machinery.ModuleSpec('baz', None)
module = importlib.util.module_from_spec(module_spec)
yield 'baz', module
@mock.patch.object(client,
'_discover_via_python_path',
mock_discover_via_python_path)
@mock.patch.object(client,
'_discover_via_entry_points',
mock_discover_via_entry_points)
def test():
extensions = client.discover_extensions('1.1')
self.assertEqual(2, len(extensions))
names = sorted(['foo', 'baz'])
sorted_extensions = sorted(extensions, key=lambda ext: ext.name)
for i in range(len(names)):
ext = sorted_extensions[i]
name = names[i]
self.assertEqual(ext.name, name)
self.assertTrue(inspect.ismodule(ext.module))
test()
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