def _test_add_filter_rule_helper(self, use_ipv6):
        self.iptables = iptables_manager.IptablesManager(
            use_ipv6=use_ipv6)
        self.execute = mock.patch.object(self.iptables, "execute").start()

        iptables_args = {}
        iptables_args.update(IPTABLES_ARG)
        filter_rules = ('-I %(bn)s-INPUT 1 -s 0/0 -d 192.168.0.2 -j '
                        '%(bn)s-filter\n-I %(bn)s-filter 1 -j DROP\n'
                        % iptables_args)
        iptables_args['filter_rules'] = filter_rules
        filter_dump_mod = FILTER_WITH_RULES_TEMPLATE % iptables_args

        raw_dump = IPTABLES_ARG % RAW_DUMP

        expected_calls_and_values = [
            (mock.call(['iptables-save'],
                       run_as_root=True),
             ''),
            (mock.call(['iptables-restore', '-n'],
                       process_input=(filter_dump_mod + MANGLE_DUMP +
                                      NAT_DUMP + RAW_DUMP),
                       run_as_root=True),
             None),
            (mock.call(['iptables-save'],
                       run_as_root=True),
             ''),
            (mock.call(['iptables-restore', '-n'],
                       process_input=(FILTER_DUMP + MANGLE_DUMP + NAT_DUMP +
                                      RAW_DUMP),
                       run_as_root=True
                       ),
             None),
        ]
        if use_ipv6:
            self._extend_with_ip6tables_filter(
                expected_calls_and_values,
                FILTER_DUMP + MANGLE_DUMP_V6 + raw_dump)

        tools.setup_mock_calls(self.execute, expected_calls_and_values)

        self.iptables.ipv4['filter'].add_chain('filter')
        self.iptables.ipv4['filter'].add_rule('filter', '-j DROP')
        self.iptables.ipv4['filter'].add_rule('INPUT',
                                              '-s 0/0 -d 192.168.0.2 -j'
                                              ' %(bn)s-filter' % IPTABLES_ARG)
        self.iptables.apply()

        self.iptables.ipv4['filter'].remove_rule('filter', '-j DROP')
        self.iptables.ipv4['filter'].remove_rule('INPUT',
                                                 '-s 0/0 -d 192.168.0.2 -j'
                                                 ' %(bn)s-filter'
                                                 % IPTABLES_ARG)
        self.iptables.ipv4['filter'].remove_chain('filter')

        self.iptables.apply()

        tools.verify_mock_calls(self.execute, expected_calls_and_values)
dataset/ETHPy150Open openstack/neutron/neutron/tests/unit/agent/linux/test_iptables_manager.py/IptablesManagerStateFulTestCase._test_add_filter_rule_helper/swapped operands of `%`