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bazarr/libs/stevedore/tests/test_callback.py

56 lines
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# 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.
"""Tests for failure loading callback
"""
from testtools.matchers import GreaterThan
import mock
from stevedore import extension
from stevedore import named
from stevedore.tests import utils
class TestCallback(utils.TestCase):
def test_extension_failure_custom_callback(self):
errors = []
def failure_callback(manager, entrypoint, error):
errors.append((manager, entrypoint, error))
em = extension.ExtensionManager('stevedore.test.extension',
invoke_on_load=True,
on_load_failure_callback=
failure_callback)
extensions = list(em.extensions)
self.assertThat(len(extensions), GreaterThan(0))
self.assertEqual(len(errors), 2)
for manager, entrypoint, error in errors:
self.assertIs(manager, em)
self.assertIsInstance(error, (IOError, ImportError))
@mock.patch('stevedore.named.NamedExtensionManager._load_plugins')
def test_missing_entrypoints_callback(self, load_fn):
errors = set()
def callback(names):
errors.update(names)
load_fn.return_value = [
extension.Extension('foo', None, None, None)
]
named.NamedExtensionManager('stevedore.test.extension',
names=['foo', 'bar'],
invoke_on_load=True,
on_missing_entrypoints_callback=callback)
self.assertEqual(errors, {'bar'})