Re: [Qemu-devel] [PATCH v2 6/7] iotests: allow pretty-print for qmp_log

[Vladimir Sementsov-Ogievskiy]

13.12.2018 4:50, John Snow wrote:
> If iotests have lines exceeding >998 characters long, git doesn't
> want to send it plaintext to the list. We can solve this by allowing
> the iotests to use pretty printed QMP output that we can match against
> instead.
> 
> As a bonus, it's much nicer for human eyes, too.
> 
> Signed-off-by: John Snow <address@hidden>
> ---
>   tests/qemu-iotests/iotests.py | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
> index 9595429fea..dbbef4bad3 100644
> --- a/tests/qemu-iotests/iotests.py
> +++ b/tests/qemu-iotests/iotests.py
> @@ -447,12 +447,12 @@ class VM(qtest.QEMUQtestMachine):
>               result.append(filter_qmp_event(ev))
>           return result
>   
> -    def qmp_log(self, cmd, filters=[filter_testfiles], **kwargs):
> +    def qmp_log(self, cmd, indent=None, filters=[filter_testfiles], 
> **kwargs):
>           logmsg = '{"execute": "%s", "arguments": %s}' % \
>               (cmd, json.dumps(kwargs, sort_keys=True))
>           log(logmsg, filters)

why not to prettify cmd json too? Just make fullobj = {"execute": cmd, 
"arguments": kwargs}, and prettify it.
(hmm, unfortunately, "execute" < "arguments", and they will be rearranged)

with or without (as the patch don't aim to prettify everything):
Reviewed-by: Vladimir Sementsov-Ogievskiy <address@hidden>

>           result = self.qmp(cmd, **kwargs)
> -        log(json.dumps(result, sort_keys=True), filters)
> +        log(json.dumps(result, indent=indent, sort_keys=True), filters)
>           return result

hmm, doing the same thing as Eric (check specs), I see the following note:

 > Note: Since the default item separator is ', ', the output might include 
 > trailing whitespace when indent is specified.

And I remember a pain of trailing whitespaces in iotests on, may be, 
backporting, or something like this some time ago.
It's of course not about this patch, but I think it is a good idea to avoid 
trailing whitespaces in test output, at least
in common helpers. May be best place to fix is iotests.log() function

>   
>       def run_job(self, job, auto_finalize=True, auto_dismiss=False):
> 


-- 
Best regards,
Vladimir