def test_join_group(self):
        self._coord.create_group(self.group_id).get()
        self._coord.join_group(self.group_id).get()
        member_list = self._coord.get_members(self.group_id).get()
        self.assertTrue(member_list in self.member_id)
dataset/ETHPy150Open openstack/tooz/tooz/tests/test_coordination.py/TestAPI.test_join_group/swapped operands of `in`