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[nexus] migrate test_br_upgrade_router_role to nexus (#12921)
This commit migrates the functionality of the Python-based certification test 'test_br_upgrade_router_role.py' to a new Nexus-based C++ test 'test_br_upgrade_router_role.cpp'. The test verifies that Border Routers (BRs) providing IP connectivity are eligible to request a router role upgrade even when the active router count already meets the 'router_upgrade_threshold'. Key test steps: - Set router upgrade threshold to 2. - Ensure three BRs remain in child role when 2 routers already exist. - Verify BRs upgrade to router role when they provide external routes or prefixes, up to the limit of 2 BR routers. - Verify that a third BR providing external routes remains a child. - Verify that removing a route from one BR router triggers the child BR to upgrade to a router. The Python test is removed as it is now covered by the Nexus test.
This commit is contained in:
Jonathan Hui
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#!/usr/bin/env python3
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#
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# Copyright (c) 2022, The OpenThread Authors.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. Neither the name of the copyright holder nor the
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# names of its contributors may be used to endorse or promote products
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# derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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import ipaddress
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import unittest
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import command
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import config
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import thread_cert
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# Test description:
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#
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# This test verifies behavior of Border Routers (which provide IP connectivity) requesting router role within Thread
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# mesh.
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# Topology:
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#
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# 5 FTD nodes, all connected.
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#
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# Topology is expected to change during execution of test.
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#
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LEADER = 1
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ROUTER = 2
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BR1 = 3
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BR2 = 4
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BR3 = 5
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class BrUpgradeRouterRole(thread_cert.TestCase):
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USE_MESSAGE_FACTORY = False
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SUPPORT_NCP = False
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TOPOLOGY = {
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LEADER: {
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'name': 'leader',
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'mode': 'rdn',
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},
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ROUTER: {
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'name': 'reader',
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'mode': 'rdn',
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},
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BR1: {
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'name': 'br-1',
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'mode': 'rdn',
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},
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BR2: {
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'name': 'br-2',
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'mode': 'rdn',
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},
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BR3: {
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'name': 'br-3',
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'mode': 'rdn',
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},
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}
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def test(self):
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leader = self.nodes[LEADER]
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router = self.nodes[ROUTER]
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br1 = self.nodes[BR1]
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br2 = self.nodes[BR2]
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br3 = self.nodes[BR3]
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#-------------------------------------------------------------------------------------
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# Set the router upgrade threshold to 2 on all nodes.
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for node in [leader, router, br1, br2, br3]:
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node.set_router_upgrade_threshold(2)
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#-------------------------------------------------------------------------------------
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# Start the leader and router.
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leader.start()
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self.simulator.go(config.LEADER_STARTUP_DELAY)
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self.assertEqual(leader.get_state(), 'leader')
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router.start()
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self.simulator.go(125)
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self.assertEqual(router.get_state(), 'router')
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#-------------------------------------------------------------------------------------
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# Start all three BRs, we expect all to stay as child since there are already two
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# routers in the Thread mesh.
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br1.start()
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br2.start()
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br3.start()
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self.simulator.go(125)
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self.assertEqual(br1.get_state(), 'child')
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self.assertEqual(br2.get_state(), 'child')
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self.assertEqual(br3.get_state(), 'child')
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#-------------------------------------------------------------------------------------
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# Add an external route on `br1`, it should now try to become a router requesting
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# with status BorderRouterRequest. Verify that leader allows it to become router.
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br1.add_route('2001:dead:beef:cafe::/64', stable=True)
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br1.register_netdata()
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self.simulator.go(15)
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self.assertEqual(br1.get_state(), 'router')
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#-------------------------------------------------------------------------------------
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# Add a prefix with default route on `br2`, it should also become a router.
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br2.add_prefix('2001:dead:beef:2222::/64', 'paros')
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br2.register_netdata()
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self.simulator.go(15)
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self.assertEqual(br2.get_state(), 'router')
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#-------------------------------------------------------------------------------------
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# Add an external route on `br3`, it should not become a router since we already have
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# two that requested router role upgrade as border router reason.
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br3.add_route('2001:dead:beef:cafe::/64', stable=True)
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br3.register_netdata()
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self.simulator.go(120)
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self.assertEqual(br3.get_state(), 'child')
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#-------------------------------------------------------------------------------------
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# Remove the external route on `br1`. This should now trigger `br3` to request a
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# router role upgrade since number of BRs acting as router in network data is now
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# below the threshold of two.
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br1.remove_route('2001:dead:beef:cafe::/64')
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br1.register_netdata()
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self.simulator.go(15)
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self.assertEqual(br1.get_state(), 'router')
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self.assertEqual(br3.get_state(), 'router')
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if __name__ == '__main__':
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unittest.main()
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