def test_sentinel_copy(self):
singleton = constants.Sentinel()
self.assertEqual(copy.deepcopy(singleton), copy.copy(singleton))
# 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 abc
from neutron_lib._i18n import _
from neutron_lib import constants
_UNSET = constants.Sentinel()
def is_extension_supported(plugin, alias):
"""Validate that the extension is supported.
:param plugin: The plugin class.
:param alias: The alias to check.
:returns: True if the alias is supported else False.
"""
return alias in getattr(plugin, "supported_extension_aliases", [])
class ExtensionDescriptor(object, metaclass=abc.ABCMeta):
"""Base class that defines the contract for extensions."""
@abc.abstractmethod
def test_sentinel_constant(self):
foo = constants.Sentinel()
bar = copy.deepcopy(foo)
self.assertEqual(id(foo), id(bar))