How to use test_network_interface_wait_for_carrier method in autotest

Best Python code snippet using autotest_python

net_utils_unittest.py

Source:net_utils_unittest.py

...656        cmd = 'ifconfig %s down' % mock_netif._name657        utils.system.expect_call(cmd)658        mock_netif.down()659        self.god.check_playback()660    def test_network_interface_wait_for_carrier(self):661        mock_netif = self.network_interface_mock()662        mock_netif.wait_for_carrier = \663                             net_utils.network_interface.wait_for_carrier664        f = self.god.create_mock_class(file, 'file')665        spath = '/sys/class/net/%s/carrier' % mock_netif._name666        # y = 0 - test that an exception is thrown667        # y = 1, 100 - check that carrier is checked until timeout668        for y in (0, 1, 100):669            max_timeout = y670            if y:671                for x in xrange(max_timeout - 1):672                    net_utils.open.expect_call(spath).and_return(f)673                    f.read.expect_call().and_return(' ' + '0' + ' ')674                    f.close.expect_call()...

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