def test_address_lookup_error_hierarcy(self):
     self.assertIsInstance(BuildFileAddressMapper.AddressNotInBuildFile(),
                           AddressLookupError)
     self.assertIsInstance(BuildFileAddressMapper.EmptyBuildFileError(),
                           AddressLookupError)
     self.assertIsInstance(
         BuildFileAddressMapper.InvalidBuildFileReference(),
         AddressLookupError)
     self.assertIsInstance(BuildFileAddressMapper.InvalidAddressError(),
                           AddressLookupError)
     self.assertIsInstance(BuildFileAddressMapper.BuildFileScanError(),
                           AddressLookupError)