def test_vn_hold_function_error(self):
        self.assertRaises(SaltCloudSystemExit,
                          opennebula.vn_hold,
                          call='foo')
Given a topic, checks whether the user can remove it from his subscription list.
dataset/ETHPy150Open saltstack/salt/tests/unit/cloud/clouds/opennebula_test.py/OpenNebulaTestCase.test_vn_hold_function_error--crossover with--dataset/ETHPy150Open ellmetha/django-machina/machina/apps/forum_permission/handler.py/PermissionHandler.can_unsubscribe_from_topic