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bazarr/libs/stevedore/tests/test_named.py

93 lines
3.3 KiB
Python

# 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.
from unittest import mock
from stevedore import named
from stevedore.tests import utils
class TestNamed(utils.TestCase):
def test_named(self):
em = named.NamedExtensionManager(
'stevedore.test.extension',
names=['t1'],
invoke_on_load=True,
invoke_args=('a',),
invoke_kwds={'b': 'B'},
)
actual = em.names()
self.assertEqual(actual, ['t1'])
def test_enabled_before_load(self):
# Set up the constructor for the FauxExtension to cause an
# AssertionError so the test fails if the class is instantiated,
# which should only happen if it is loaded before the name of the
# extension is compared against the names that should be loaded by
# the manager.
init_name = 'stevedore.tests.test_extension.FauxExtension.__init__'
with mock.patch(init_name) as m:
m.side_effect = AssertionError
em = named.NamedExtensionManager(
'stevedore.test.extension',
# Look for an extension that does not exist so the
# __init__ we mocked should never be invoked.
names=['no-such-extension'],
invoke_on_load=True,
invoke_args=('a',),
invoke_kwds={'b': 'B'},
)
actual = em.names()
self.assertEqual(actual, [])
def test_extensions_listed_in_name_order(self):
# Since we don't know the "natural" order of the extensions, run
# the test both ways: if the sorting is broken, one of them will
# fail
em = named.NamedExtensionManager(
'stevedore.test.extension',
names=['t1', 't2'],
name_order=True
)
actual = em.names()
self.assertEqual(actual, ['t1', 't2'])
em = named.NamedExtensionManager(
'stevedore.test.extension',
names=['t2', 't1'],
name_order=True
)
actual = em.names()
self.assertEqual(actual, ['t2', 't1'])
def test_load_fail_ignored_when_sorted(self):
em = named.NamedExtensionManager(
'stevedore.test.extension',
names=['e1', 't2', 'e2', 't1'],
name_order=True,
invoke_on_load=True,
invoke_args=('a',),
invoke_kwds={'b': 'B'},
)
actual = em.names()
self.assertEqual(['t2', 't1'], actual)
em = named.NamedExtensionManager(
'stevedore.test.extension',
names=['e1', 't1'],
name_order=False,
invoke_on_load=True,
invoke_args=('a',),
invoke_kwds={'b': 'B'},
)
actual = em.names()
self.assertEqual(['t1'], actual)