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The output [warning] of podman:
[33mWARN[0m[0000] Path "/etc/SUSEConnect" from "/etc/containers/mounts.conf" doesn't exist, skipping is
mixed to the validation output check, in https://openqa.suse.de/tests/13738138#step/podman/148:

Script:
podman run --rm --init registry.opensuse.org/opensuse/tumbleweed ps --no-headers -xo 'pid args'

Check function (deparsed code):
{
    package container_engine;
    use feature 'current_sub', 'evalbytes', 'fc', 'say', 'state', 'switch', 'unicode_strings', 'unicode_eval';
    not(($_ =~ / 1 .*ps.*/u));
}

Output:
WARN[0000] Path "/etc/SUSEConnect" from "/etc/containers/mounts.conf" doesn't exist, skipping 
    1 /run/podman-init -- ps --no-headers -xo pid args
    7 ps --no-headers -xo pid args

Error is:

Test died: output not validating at /usr/lib/os-autoinst/testapi.pm line 1229.
    testapi::validate_script_output("podman run --rm --init registry.opensuse.org/opensuse/tumblew"..., CODE(0x55ac9380c3a0)) called at sle-micro/tests/containers/container_engine.pm line 97
    container_engine::basic_container_tests("runtime", "podman") called at sle-micro/tests/containers/container_engine.pm line 134
    container_engine::run(container_engine=HASH(0x55ac9372cda8), OpenQA::Test::RunArgs=HASH(0x55ac935a9400)) called at /usr/lib/os-autoinst/basetest.pm line 348
    eval {...} called at /usr/lib/os-autoinst/basetest.pm line 346
    basetest::runtest(container_engine=HASH(0x55ac9372cda8)) called at /usr/lib/os-autoinst/autotest.pm line 415
    eval {...} called at /usr/lib/os-autoinst/autotest.pm line 415
    autotest::runalltests() called at /usr/lib/os-autoinst/autotest.pm line 272
    eval {...} called at /usr/lib/os-autoinst/autotest.pm line 272
    autotest::run_all() called at /usr/lib/os-autoinst/autotest.pm line 323
    autotest::__ANON__(Mojo::IOLoop::ReadWriteProcess=HASH(0x55ac950466e0)) called at /usr/lib/perl5/vendor_perl/5.26.1/Mojo/IOLoop/ReadWriteProcess.pm line 329
    eval {...} called at /usr/lib/perl5/vendor_perl/5.26.1/Mojo/IOLoop/ReadWriteProcess.pm line 329
    Mojo::IOLoop::ReadWriteProcess::_fork(Mojo::IOLoop::ReadWriteProcess=HASH(0x55ac950466e0), CODE(0x55ac9417e880)) called at /usr/lib/perl5/vendor_perl/5.26.1/Mojo/IOLoop/ReadWriteProcess.pm line 492
    Mojo::IOLoop::ReadWriteProcess::start(Mojo::IOLoop::ReadWriteProcess=HASH(0x55ac950466e0)) called at /usr/lib/os-autoinst/autotest.pm line 325
    autotest::start_process() called at /usr/lib/os-autoinst/OpenQA/Isotovideo/Runner.pm line 94
    OpenQA::Isotovideo::Runner::start_autotest(OpenQA::Isotovideo::Runner=HASH(0x55ac8e59cbf8)) called at /usr/bin/isotovideo line 192
    eval {...} called at /usr/bin/isotovideo line 181

BUT here the validation is detecting some process including ps and having PID=1, not wanted, however here is podman-init that is ok.

See tests/containers/container_engine.pm L#95

PR https://github.com/os-autoinst/os-autoinst-distri-opensuse/pull/18837

Here used a new expression to state the expected process to be present with pid=1.

This is actually a fallout of https://progress.opensuse.org/issues/155404 and I will handle it.

Has duplicated poo https://progress.opensuse.org/issues/157000

PR https://github.com/os-autoinst/os-autoinst-distri-opensuse/pull/18845
For ps output like:
1 /run/podman-init -- ps --no-headers -xo pid args
or
1 /dev/init -- ps --no-headers -xo pid args,
3 possible processes only have been defined to be matched /dev/init, /run/podman-init or /sbin/docker-init, having PID=1,
by the expression /\s*1 .*(${runtime}-|\/)init .*/ , that means:
\s* that is any or none space before number 1, then
one fixed space, then
any string sequence, followed by 2 possible OR-cases in parenthesys:
(
${runtime}, followed by a dash -, then init [ that is ${runtime}-init ]
OR
the / character only, then init [ that is /init ]
), followed by
one fixed space, then
any string sequence.

The VR test passed ok; PR merged.