Python before 3.6 does not sort kwargs by default. If we want to print out pretty-printed QMP objects while preserving the "exec" > "arguments" ordering, we need a custom sort.
We can accomplish this by sorting **kwargs into an OrderedDict, which does preserve addition order. --- tests/qemu-iotests/iotests.py | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-) diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py index 9595429fea..9aec03c7a3 100644 --- a/tests/qemu-iotests/iotests.py +++ b/tests/qemu-iotests/iotests.py @@ -30,6 +30,7 @@ import signal import logging import atexit import io +from collections import OrderedDict sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'scripts')) import qtest @@ -75,6 +76,16 @@ def qemu_img(*args): sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args)))) return exitcode +def ordered_kwargs(kwargs): + # kwargs prior to 3.6 are not ordered, so: + od = OrderedDict() + for k in sorted(kwargs.keys()): + if isinstance(kwargs[k], dict): + od[k] = ordered_kwargs(kwargs[k]) + else: + od[k] = kwargs[k] + return od + def qemu_img_create(*args): args = list(args) @@ -257,8 +268,9 @@ def filter_img_info(output, filename): def log(msg, filters=[]): for flt in filters: msg = flt(msg) - if type(msg) is dict or type(msg) is list: - print(json.dumps(msg, sort_keys=True)) + if isinstance(msg, dict) or isinstance(msg, list): + sort_keys = not isinstance(msg, OrderedDict) + print(json.dumps(msg, sort_keys=sort_keys)) else: print(msg) @@ -448,8 +460,9 @@ class VM(qtest.QEMUQtestMachine): return result def qmp_log(self, cmd, filters=[filter_testfiles], **kwargs): - logmsg = '{"execute": "%s", "arguments": %s}' % \ - (cmd, json.dumps(kwargs, sort_keys=True)) + full_cmd = OrderedDict({"execute": cmd, + "arguments": ordered_kwargs(kwargs)}) + logmsg = json.dumps(full_cmd) log(logmsg, filters) result = self.qmp(cmd, **kwargs) log(json.dumps(result, sort_keys=True), filters) -- 2.17.2