def coerce(cls, string):
        """Create a :class:`Requirement` object from a given package spec."""
        match = re.match(cls.spec_regex, string)
        if not match:
            raise InvalidRequirementSpecError("could not parse requirement")
        package = match.group(1)
        if all(match.group(2, 3)):
            version = "".join(match.group(2, 3))
        else:
            version = None
        return cls(package, version)
def test_conf_inline_tls(self):
        fake_context = mock.Mock()
        with mock.patch.object(ssl, 'create_default_context',
                               return_value=fake_context):
            with mock.patch.object(memcache, 'ConfigParser',
                                   get_config_parser()):
                memcache.MemcacheMiddleware(
                    FakeApp(),
                    {'tls_enabled': 'true',
                     'tls_cafile': 'cafile',
                     'tls_certfile': 'certfile',
                     'tls_keyfile': 'keyfile'})
            ssl.create_default_context.assert_called_with(cafile='cafile')
            fake_context.load_cert_chain.assert_called_with('certfile',
                                                            'keyfile')