223 lines
7.2 KiB
Python
Executable File
223 lines
7.2 KiB
Python
Executable File
#!/usr/bin/env python3
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from osmo_gsm_tester.testenv import *
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from osmo_gsm_tester.obj.osmo_ctrl import *
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hlr = tenv.hlr()
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bts0 = tenv.bts()
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bts1 = tenv.bts()
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mgw_msc = tenv.mgw()
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mgw_bsc = tenv.mgw()
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stp = tenv.stp()
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msc = tenv.msc(hlr, mgw_msc, stp)
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bsc = tenv.bsc(msc, mgw_bsc, stp)
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ms0 = tenv.modem()
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ms1 = tenv.modem()
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hlr.start()
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stp.start()
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msc.start()
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mgw_msc.start()
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mgw_bsc.start()
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bsc.bts_add(bts0)
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bsc.bts_add(bts1)
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bsc.start()
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# prevent handovers from measurement reports, enable handover so that
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# triggering handover from VTY works.
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bsc.vty.cmds(
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'enable',
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'configure terminal',
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'network',
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'handover algorithm 2',
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'handover2 min rxlev -110',
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'handover2 min rxqual 7',
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'handover2 power budget hysteresis 999',
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'handover 1',
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'end')
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# now back on the 'enable' node.
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# first start only the first BTS, to make sure both modems subscribe there
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with test.report_fragment('01_bts0_started'):
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bts0.start()
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wait(bsc.bts_is_connected, bts0)
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hlr.subscriber_add(ms0)
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hlr.subscriber_add(ms1)
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ms0.connect(msc.mcc_mnc())
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ms1.connect(msc.mcc_mnc())
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ms0.log_info()
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ms1.log_info()
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print('waiting for modems to attach...')
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with test.report_fragment('02.1_ms0_attach'):
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wait(ms0.is_registered, msc.mcc_mnc())
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with test.report_fragment('02.2_ms1_attach'):
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wait(ms1.is_registered, msc.mcc_mnc())
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with test.report_fragment('02.3_subscribed_in_msc'):
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wait(msc.subscriber_attached, ms0, ms1)
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assert len(ms0.call_id_list()) == 0 and len(ms1.call_id_list()) == 0
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mo_cid = ms0.call_dial(ms1)
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mt_cid = ms1.call_wait_incoming(ms0)
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print('dial success')
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with test.report_fragment('03_call_established'):
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assert not ms0.call_is_active(mo_cid) and not ms1.call_is_active(mt_cid)
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ms1.call_answer(mt_cid)
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wait(ms0.call_is_active, mo_cid)
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wait(ms1.call_is_active, mt_cid)
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print('answer success, call established and ongoing')
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assert bsc.vty.active_lchans_match(
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expected=('0-0-2-0 TCH/F ESTABLISHED',
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'0-0-3-0 TCH/F ESTABLISHED'))
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# call is connected; start up the second BTS so that we can trigger a handover to it
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with test.report_fragment('04.1_bts1_started'):
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bts1.start()
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wait(bsc.bts_is_connected, bts1)
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print('wait a bit for modems to see bts1')
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sleep(10.0)
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# TODO evaluate measurement reports instead?
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counter_names = (
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'handover:completed',
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'handover:stopped',
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'handover:no_channel',
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'handover:timeout',
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'handover:failed',
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'handover:error',
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)
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counters = RateCounters('bsc', counter_names, from_ctrl=bsc.ctrl)
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counters.add(RateCounters('bts', counter_names, instances=(0, 1)))
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def do_handover(initial_lchans, target_lchan, vty_cmd, final_lchans, attempts=5):
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worked = False
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while (attempts > 0) and (not worked):
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# make sure the call is still active as expected
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assert bsc.vty.active_lchans_match(**initial_lchans)
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# make sure the handover target lchan is unused (maybe waiting after previous error)
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wait(bsc.vty.active_lchans_match, **target_lchan, timeout=20)
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counters.read()
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log_mark = bsc.process.get_output_mark('stderr')
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print('trigger handover: %s' % vty_cmd)
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bsc.vty.cmd(vty_cmd)
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print('wait for handover counters to change...')
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wait(counters.changed, timeout=20)
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print(counters.diff.str(skip_zero_vals=True))
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print('\n'+'\n'.join(bsc.process.grep_output('stderr', r'\bhandover\(|\bDCHAN\b', log_mark)))
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worked = bsc.vty.active_lchans_match(**final_lchans)
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if not worked and attempts > 0:
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attempts -= 1
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print('did not work, try again... (attempts left: %d)' % attempts)
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return worked
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with test.report_fragment('05.1_handover_ms0'):
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assert do_handover(
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initial_lchans=dict(
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expected=('0-0-2-0 TCH/F ESTABLISHED',
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'0-0-3-0 TCH/F ESTABLISHED'),
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),
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target_lchan=dict(
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not_expected=('1-0-2-0',),
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),
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vty_cmd='bts 0 trx 0 timeslot 2 sub-slot 0 handover 1',
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final_lchans=dict(
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expected=('0-0-3-0 TCH/F ESTABLISHED',
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'1-0-2-0 TCH/F ESTABLISHED',),
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not_expected=('0-0-2-0 TCH/F ESTABLISHED',),
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),
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)
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with test.report_fragment('05.2_handover_ms1'):
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assert do_handover(
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initial_lchans=dict(
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expected=('0-0-3-0 TCH/F ESTABLISHED',
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'1-0-2-0 TCH/F ESTABLISHED'),
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),
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target_lchan=dict(
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not_expected=('1-0-3-0',),
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),
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vty_cmd='bts 0 trx 0 timeslot 3 sub-slot 0 handover 1',
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final_lchans=dict(
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expected=('1-0-2-0 TCH/F ESTABLISHED',
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'1-0-3-0 TCH/F ESTABLISHED',),
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not_expected=('0-0-2-0 TCH/F ESTABLISHED',
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'0-0-3-0 TCH/F ESTABLISHED',),
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),
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)
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with test.report_fragment('06_call_stable'):
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print('expect the call to continue for a while, to ensure the new lchan is functional')
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for i in range(5):
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sleep(5)
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assert bsc.vty.active_lchans_match(
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expected=('1-0-2-0 TCH/F ESTABLISHED',
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'1-0-3-0 TCH/F ESTABLISHED',))
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print('call is still fine')
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print('handover back (test the other BTS model)')
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with test.report_fragment('07.1_handover_ms1_back'):
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assert do_handover(
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initial_lchans=dict(
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expected=('1-0-2-0 TCH/F ESTABLISHED',
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'1-0-3-0 TCH/F ESTABLISHED'),
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),
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target_lchan=dict(
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not_expected=('0-0-2-0',),
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),
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vty_cmd='bts 1 trx 0 timeslot 3 sub-slot 0 handover 0',
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final_lchans=dict(
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expected=('0-0-2-0 TCH/F ESTABLISHED',
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'1-0-2-0 TCH/F ESTABLISHED',),
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not_expected=('1-0-3-0 TCH/F ESTABLISHED',),
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),
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)
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with test.report_fragment('07.2_handover_ms0_back'):
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assert do_handover(
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initial_lchans=dict(
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expected=('0-0-2-0 TCH/F ESTABLISHED',
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'1-0-2-0 TCH/F ESTABLISHED'),
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),
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target_lchan=dict(
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not_expected=('0-0-3-0',),
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),
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vty_cmd='bts 1 trx 0 timeslot 2 sub-slot 0 handover 0',
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final_lchans=dict(
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expected=('0-0-2-0 TCH/F ESTABLISHED',
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'0-0-3-0 TCH/F ESTABLISHED',),
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not_expected=('1-0-2-0 TCH/F ESTABLISHED',
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'1-0-3-0 TCH/F ESTABLISHED',),
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),
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)
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with test.report_fragment('08_call_stable'):
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print('expect the call to continue for a while, to ensure the new lchan is functional')
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for i in range(5):
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sleep(5)
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assert bsc.vty.active_lchans_match(
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expected=('0-0-2-0 TCH/F ESTABLISHED',
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'0-0-3-0 TCH/F ESTABLISHED',))
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print('call is still fine')
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assert ms0.call_is_active(mo_cid) and ms1.call_is_active(mt_cid)
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ms1.call_hangup(mt_cid)
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wait(lambda: len(ms0.call_id_list()) == 0 and len(ms1.call_id_list()) == 0)
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print('hangup success')
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# vim: tabstop=4 shiftwidth=4 expandtab
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