On 12/06/2017 08:45 AM, Stefan Hajnoczi wrote:
> QMP 'transaction' blockdev-snapshot-sync with multiple disks in an
> IOThread is an untested code path.  Several bugs have been found in
> connection with this command.  This patch adds a test case to prevent
> future regressions.
> 
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
>  tests/qemu-iotests/202     | 95 ++++++++++++++++++++++++++++++++++++++++++++++
>  tests/qemu-iotests/202.out | 11 ++++++
>  tests/qemu-iotests/group   |  1 +
>  3 files changed, 107 insertions(+)
>  create mode 100755 tests/qemu-iotests/202
>  create mode 100644 tests/qemu-iotests/202.out
> 

> +# Creator/Owner: Stefan Hajnoczi <stefanha@redhat.com>

There's another cleanup series posted that drops these sorts of lines in
favor of git history.

> +++ b/tests/qemu-iotests/202.out
> @@ -0,0 +1,11 @@
> +Launching VM...
> +Adding IOThread...
> +{u'return': {}}
> +Adding blockdevs...
> +{u'return': {}}
> +{u'return': {}}
> +Setting iothread...
> +{u'return': {}}
> +{u'return': {}}
> +Creating external snapshots...
> +{u'return': {}}

Yay - a python test with sane output - if I had to, I could actually
debug this test without too much effort!

Reviewed-by: Eric Blake <eblake@redhat.com>

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org