Change in osmo-ttcn3-hacks[master]: MSC_Tests.ttcn: introduce TC_lu_and_ss_session_timeout

[Vadim Yanitskiy]

Hello Neels Hofmeyr, Harald Welte, Jenkins Builder, 

I'd like you to reexamine a change. Please visit

    https://gerrit.osmocom.org/11985

to look at the new patch set (#4).

Change subject: MSC_Tests.ttcn: introduce TC_lu_and_ss_session_timeout
......................................................................

MSC_Tests.ttcn: introduce TC_lu_and_ss_session_timeout

The idea of this test case is to verify SS session termination
due to expiry of its guard timeout. The timeout value is
intentionally set to a few seconds in order to speedup
test case execution (we don't want to wait 2 minutes).

We expect OsmoMSC to inform both session entities (MS and EUSE)
about timeout expiry before releasing the transaction. The MS
should receive GSM 04.80 RELEASE COMPLETE message with optional
cause, while the EUSE should receive OSMO_GSUP_MSGT_PROC_SS_ERROR.

At the moment, it's not clean which cause values should be used:

  - for GSM 04.80 RELEASE COMPLETE the cause IE is optional,
    and possible values are defined in GSM TS 04.08, annex G-H.
    The H.6.7 Cause No. 102 "recovery on timer expiry" seems to
    be suitable;

  - for OSMO_GSUP_MSGT_PROC_SS_ERROR the generic cause IE could
    be used, but actually this IE is not generic at all, and
    limited by 'gsm48_gmm_cause' enum;

so we temporarily expect arbitrary cause values in both messages.

Change-Id: I3e1791773d56617172ae27a46889a1ae4d400e2f
Depends-on: (OsmoMSC) Icf4d87c45e90324764073e8230e0fb9cb96dd9cb
Related: OS#3655
---
M msc/MSC_Tests.ttcn
M msc/expected-results.xml
2 files changed, 74 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/85/11985/4
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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I3e1791773d56617172ae27a46889a1ae4d400e2f
Gerrit-Change-Number: 11985
Gerrit-PatchSet: 4
Gerrit-Owner: Vadim Yanitskiy <axilirator at gmail.com>
Gerrit-Reviewer: Harald Welte <laforge at gnumonks.org>
Gerrit-Reviewer: Jenkins Builder (1000002)
Gerrit-Reviewer: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Gerrit-Reviewer: Vadim Yanitskiy <axilirator at gmail.com>
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