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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.
import abc
import pytest
import six
from cryptography.utils import (
InterfaceNotImplemented, register_interface, verify_interface
)
class TestVerifyInterface(object):
def test_verify_missing_method(self):
@six.add_metaclass(abc.ABCMeta)
class SimpleInterface(object):
@abc.abstractmethod
def method(self):
"""A simple method"""
@register_interface(SimpleInterface)
class NonImplementer(object):
pass
with pytest.raises(InterfaceNotImplemented):
verify_interface(SimpleInterface, NonImplementer)
def test_different_arguments(self):
@six.add_metaclass(abc.ABCMeta)
class SimpleInterface(object):
@abc.abstractmethod
def method(self, a):
"""Method with one argument"""
@register_interface(SimpleInterface)
class NonImplementer(object):
def method(self):
"""Method with no arguments"""
with pytest.raises(InterfaceNotImplemented):
verify_interface(SimpleInterface, NonImplementer)
def test_handles_abstract_property(self):
@six.add_metaclass(abc.ABCMeta)
class SimpleInterface(object):
@abc.abstractproperty
def property(self):
"""An abstract property"""
@register_interface(SimpleInterface)
class NonImplementer(object):
@property
def property(self):
"""A concrete property"""
verify_interface(SimpleInterface, NonImplementer)
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