iotests: remove default filters from qmp_log

Several places in iotests deal with serializing objects into JSON
strings, but to add pretty-printing it seems desirable to localize
all of those cases.

log() seems like a good candidate for that centralized behavior.
log() can already serialize json objects, but when it does so,
it assumes filters=[] operates on QMP objects, not strings.

qmp_log currently operates by dumping outgoing and incoming QMP
objects into strings and filtering them assuming that filters=[]
are string filters.

To have qmp_log use log's serialization, qmp_log will need to
accept only qmp filters, not text filters.

However, only a single caller of qmp_log actually requires any
filters at all. I remove the default filter and add it explicitly
to the caller in preparation for refactoring qmp_log to use rich
filters instead.

test 206 is amended to name the filter explicitly and the default
is removed.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20181221093529.23855-9-jsnow@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index 565eebb1ab..57fe20db45 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -460,7 +460,7 @@ 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, filters=[], **kwargs):
         full_cmd = OrderedDict((
             ("execute", cmd),
             ("arguments", ordered_kwargs(kwargs))