Re: [Qemu-devel] [PATCH v3 6/7] iotests: allow pretty-print for qmp_log

[Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>]

15.12.2018 2:15, 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.
> 
> Note that this changes the sort order for "command" and "arguments",
> so I restrict this reordering to occur only when the indent is specified.
> ---
>   tests/qemu-iotests/iotests.py | 17 +++++++++++++----
>   1 file changed, 13 insertions(+), 4 deletions(-)
> 
> diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
> index 9595429fea..ab5823c011 100644
> --- a/tests/qemu-iotests/iotests.py
> +++ b/tests/qemu-iotests/iotests.py
> @@ -447,12 +447,21 @@ class VM(qtest.QEMUQtestMachine):
>               result.append(filter_qmp_event(ev))
>           return result
>   
> -    def qmp_log(self, cmd, filters=[filter_testfiles], **kwargs):
> -        logmsg = '{"execute": "%s", "arguments": %s}' % \
> -            (cmd, json.dumps(kwargs, sort_keys=True))
> +    def qmp_log(self, cmd, indent=None, filters=[filter_testfiles], **kwargs):
> +        # Python < 3.4 needs to know not to add whitespace when pretty-printing:
> +        separators = (',', ': ') if indent is not None else (',', ': ')
> +        if indent is not None:
> +            fullcmd = { "execute": cmd,
> +                        "arguments": kwargs }
> +            logmsg = json.dumps(fullcmd, indent=indent, separators=separators,
> +                                sort_keys=True)
> +        else:
> +            logmsg = '{"execute": "%s", "arguments": %s}' % \
> +                (cmd, json.dumps(kwargs, sort_keys=True))

definitely overlogic on None/is not None, but anyway, ',' separator leads to less
beautiful output. So, I think it is better to do just "re.sub(r'\s+\n', '\n', longmsg)"
on final message, here or in log(), or in both.

>           log(logmsg, filters)
>           result = self.qmp(cmd, **kwargs)
> -        log(json.dumps(result, sort_keys=True), filters)
> +        log(json.dumps(result, indent=indent, separators=separators,
> +                       sort_keys=True), filters)
>           return result
>   
>       def run_job(self, job, auto_finalize=True, auto_dismiss=False):
> 


-- 
Best regards,
Vladimir