def METHOD_NAME(self):
    group = self.gitlab_instance.groups.get(1)
    user = self.gitlab_instance.users.get(1)
    rvalue = self.moduleUtil.assign_user_to_group(user, group.id, "developer")
    self.assertEqual(rvalue, False)
    rvalue = self.moduleUtil.assign_user_to_group(user, group.id, "guest")
    self.assertEqual(rvalue, True)