old_contents: # 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):
                  pass
  
          @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):
                  pass
  
          @register_interface(SimpleInterface)
          class NonImplementer(object):
              def method(self):
                  pass
  
          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):
                  pass
  
          @register_interface(SimpleInterface)
          class NonImplementer(object):
              @property
              def property(self):
                  pass
  
          verify_interface(SimpleInterface, NonImplementer)
  
new_contents: # 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)
  
subject: fix up the line coverage