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How to use test_preserve_preexisting_port method in tempest

Best Python code snippet using tempest_python

test_network_basic_ops.py

Source:test_network_basic_ops.py

...533    @testtools.skipUnless(CONF.compute_feature_enabled.preserve_ports,534                          'Preserving ports on instance delete may not be '535                          'supported in the version of Nova being tested.')536    @test.services('compute', 'network')537    def test_preserve_preexisting_port(self):538        """Tests that a pre-existing port provided on server boot is not539        deleted if the server is deleted.540        Nova should unbind the port from the instance on delete if the port was541        not created by Nova as part of the boot request.542        """543        # Setup the network, create a port and boot the server from that port.544        self._setup_network_and_servers(boot_with_port=True)545        _, server = self.floating_ip_tuple546        self.assertIsNotNone(self.port_id,547                             'Server should have been created from a '548                             'pre-existing port.')549        # Assert the port is bound to the server.550        port_list = self._list_ports(device_id=server['id'],551                                     network_id=self.network['id'])...

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