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authorHarald Welte <laforge@gnumonks.org>2018-08-30 20:55:54 +0200
committerHarald Welte <laforge@gnumonks.org>2018-09-16 12:39:51 +0200
commit3db03118a30d5f797933e09ded426944a3cd3f1d (patch)
tree2a271e7082dbc97c65821b6a90845565e1913b4a
parent7b8c522741cb8f0415724917643deb287cd77f5c (diff)
add ttcn3 test suites slides from OsmoDevCon 2018
Those slides are copied from http://git.gnumonks.org/laforge-slides/plain/2018/osmodevcon2018-ttcn3_test_suites/ to make sure they are more easily found. It would be nice to convert them into an actual asciidoc book with one chapter per test suite which would be built from within this repository. This way we can keep documentation and code better in sync. Change-Id: I8a0d66babc165678ec53a1ee1c673e93708b8b79
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+Osmocom TTCN-3 Test Suites
+==========================
+:author: Harald Welte <laforge@gnumonks.org>
+:copyright: 2018 by Harald Welte (License: CC-BY-SA)
+:backend: slidy
+:max-width: 45em
+
+
+== Osmocom TTCN-3 Test Suites
+
+* developed in 2017+2018
+* compiled using Eclipse TITAN
+** uses just a command-line compiler + Makefiles
+** no IDE needed at all, don't let _Eclipse_ fool you
+* containerized in Docker
+* executed by Jenkins CI
+
+== Terminology
+
+ATS:: Abstract Test Suite
+MTC:: Main Test Component
+PTC:: Parallel Test Component
+IUT:: Implementation Under Test
+
+== Test Suite Philosophy
+
+* test one network element (our IUT)
+* test external behavior (3GPP and non-3GPP)
+* emulate entire environment from TTCN-3
+* don't reuse Osmocom C-code protocol implementations in the tests
+* test against independent TTCN-3 implementations!
+
+== What to test?
+
+* successful cases
+* erroneous cases (no answer, NACK, ...)
+** many difficult to reproduce with real phones/devices
+* load / resource exhaustion
+* spec compliance
+* focus on functionality actually relevant to IUT
+
+== Why TTCN-3 + TITAN
+
+* TTCN-3 specifically designed for telecom protocol testing
+* TITAN team released many telecom protocols in TTCN-3, such as
+** BSSAP, L3 (RR/MM/CC), SMS (CP/RP/TP), SS, M3UA, SCCP, GTP, NS, BSSGP, ...
+** shortens our test development cycle
+** permits us to test against known working industry implementations
+
+== Test suites for Osmocom CNI components
+
+* `osmo-bts`
+* `osmo-bsc`
+* `osmo-msc`
+* `osmo-mgw`
+* `osmo-hlr`
+* `osmo-sip-connector`
+* `osmo-sgsn`
+* `osmo-ggsn`
+
+== Test suites in progress
+
+* `osmo-pcu`
+* `osmo-bsc_nat`
+
+
+
+
+== BTS_Tests.ttcn
+
+* external interfaces
+** A-bis side: RSL (emulates BSC-side server)
+** Um side: L1CTL to control MS
+** PCU side: pcu_socket
+
+[graphviz]
+----
+digraph G {
+ rankdir=LR;
+ { rank=same; BTS, BSC};
+ BTS [label="IUT\nosmo-bts-trx",shape="box"];
+ ATS [label="ATS\nBTS_Tests.ttcn"];
+ BSC [label="osmo-bsc\nOML only"];
+ BTS -> fake_trx [label="bursts"];
+ fake_trx -> trxcon [label="bursts"];
+ trxcon -> ATS [label="bursts"];
+
+ BTS -> BSC [label="A-bis OML"];
+ BTS -> ATS [label="A-bis RSL"];
+
+ ATS -> BTS [label="pcu_sock"];
+ ATS -> BSC [label="VTY"];
+ ATS -> BTS [label="CTRL"];
+}
+----
+
+
+
+== BSC_Tests.ttcn
+
+* external interfaces
+** A-bis side: RSL (emulates BTS-side client)
+** A-side: BSSAP/SCCP/M3UA (emulates MSC-side)
+** MGW side: MGCP (emulates MGW side)
+
+[graphviz]
+----
+digraph G {
+ rankdir=LR;
+ { rank=same; BTS; STP; };
+ BSC [label="IUT\nosmo-bsc",shape="box"];
+ ATS [label="ATS\nBSC_Tests.ttcn"];
+ BTS [label="osmo-bts-omldummy\nOML only"];
+
+ BTS -> BSC [label="A-bis OML"];
+ ATS -> BSC [label="A-bis RSL"];
+ ATS -> BSC [label="CTRL"];
+ ATS -> BSC [label="VTY"];
+ ATS -> STP [label="A BSSAP\nSCCP/M3UA"];
+ BSC -> STP [label="A BSSAP\nSCCP/M3UA"];
+}
+----
+
+== MSC_Tests.ttcn
+
+* external interfaces
+** A: BSSAP/SCCP/M3UA (emulates BSC-side)
+** MNCC: MNCC/unix-domain (emulates ext. MNCC side)
+** MGW: MGCP (emulates MGW side)
+** GSUP (emulates HLR side)
+
+[graphviz]
+----
+digraph G {
+ rankdir=LR;
+ MSC [label="IUT\nosmo-msc",shape="box"];
+ ATS [label="ATS\nMSC_Tests.ttcn"];
+
+ ATS -> MSC [label="MNCC"];
+ ATS -> MSC [label="SMPP",style="dashed"];
+ ATS -> MSC [label="CTRL"];
+ ATS -> MSC [label="VTY"];
+ MSC -> ATS [label="GSUP"];
+ ATS -> STP [label="A BSSAP\nSCCP/M3UA"];
+ MSC -> STP [label="A BSSAP\nSCCP/M3UA"];
+}
+----
+
+
+== MGCP_Test.ttcn
+
+* external interfaces
+** MGCP (emulates call agent)
+** RTP (stream source/sink)
+
+[graphviz]
+----
+digraph G {
+ rankdir=LR;
+ MGW [label="IUT\nosmo-mgw",shape="box"];
+ ATS [label="ATS\nMGCP_Test.ttcn"];
+
+ ATS -> MGW [label="RTP"];
+ ATS -> MGW [label="MGCP"];
+ MGW -> ATS [label="RTP"];
+}
+----
+
+== HLR_Tests.ttcn
+
+* external interfaces
+** GSUP (emulates VLR/SGSN side)
+** VTY
+
+[graphviz]
+----
+digraph G {
+ rankdir=LR;
+ HLR [label="IUT\nosmo-hlr",shape="box"];
+ ATS [label="ATS\nHLR_Tests.ttcn"];
+
+ ATS -> HLR [label="GSUP"];
+ ATS -> HLR [label="VTY"];
+}
+----
+
+
+== SIP_Tests.ttcn
+
+* external interfaces
+** MNCC (emulates MSC side)
+** SIP (emulates SIP switch)
+** VTY
+
+[graphviz]
+----
+digraph G {
+ rankdir=LR;
+ SIP [label="SIP\nosmo-sip-connector",shape="box"];
+ ATS [label="ATS\nSIP_Tests.ttcn"];
+
+ ATS -> SIP [label="MNCC"];
+ ATS -> SIP [label="SIP"];
+ ATS -> SIP [label="VTY"];
+}
+----
+
+
+== SGSN_Tests.ttcn
+
+* external interfaces
+** Gb (emulates PCU side NS/BSSGP + MS)
+** GSUP (emulates HLR)
+** VTY
+
+[graphviz]
+----
+digraph G {
+ rankdir=LR;
+ SGSN [label="SGSN\nosmo-sgsn",shape="box"];
+ ATS [label="ATS\nSGSN_Tests.ttcn"];
+
+ ATS -> SGSN [label="Gb"];
+ SGSN-> ATS [label="Gp (GTP)"];
+ ATS -> SGSN [label="VTY"];
+}
+----
+
+
+== GGSN_Tests.ttcn
+
+* external interfaces
+** Gp: GTP (emulates SGSN)
+** Gi: IP (emulates Internet)
+
+[graphviz]
+----
+digraph G {
+ rankdir=LR;
+ GGSN [label="GGSN\nosmo-ggsn",shape="box"];
+ ATS [label="ATS\nGGSN_Tests.ttcn"];
+
+ ATS -> GGSN [label="Gp (GTP)"];
+ GGSN -> ATS [label="Gi (IP)"];
+ ATS -> GGSN [label="VTY"];
+}
+----
+
+
+
+== Dockerized Setup
+
+* one process per container
+* packages either
+** IUT (e.g. `osmo-bsc`)
+** ATS (compiled docker test suite)
+** other utility (e.g. `trxcon` or `osmo-bts-omldummy`)
+* why?
+** no need for local ip/network configuration
+** standardized / packaged setup on every machine
+** run older/newer versions of ATS against older/newer IUT
+
+== Jenkins CI Execution
+
+. update `docker-playground.git`
+.. contains `Dockerfile` for ATS + IUT
+. rebuild IUT container[s] (e.g. `osmo-bts-master`)
+.. git magic ensures re-build only if `osmo-bts.git` master changed
+. rebuild ATS container (e.g. `ttcn3-bts-test`)
+.. git magic ensures re-build only if `osmo-ttcn3-hacks.git` master changed
+. run `docker-playground/ttcn3-bts-test/jenkins.sh`
+.. creates docker network
+.. starts IUT + ATS docker containers
+.. collects test results
+
+
+== Jenkins CI Reporting
+
+* junit-xml generation
+* store artefacts
+** pcap file of every test case
+** ATS log file (TTCN-3 testsuite)
+** IUT log file[s] (`osmo-*.log`)
+** IUT config file[s] (`osmo-*.cfg`)
+* see https://jenkins.osmocom.org/jenkins/view/TTCN3/
+
+
+== Further Reading
+
+* http://git.osmocom.org/osmo-ttcn3-hacks/
+* http://git.osmocom.org/docker-playground/
+* http://osmocom.org/projects/cellular-infrastructure/wiki/Titan_TTCN3_Notes
+
+== EOF
+
+End of File