diff options
| -rw-r--r-- | tests/qemu-iotests/iotests.py | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py index 9351f9c6ac..56aa068277 100644 --- a/tests/qemu-iotests/iotests.py +++ b/tests/qemu-iotests/iotests.py @@ -277,6 +277,38 @@ def ordered_qmp(qmsg, conv_keys=True): def qemu_img_create(*args: str) -> 'subprocess.CompletedProcess[str]': return qemu_img('create', *args) +def qemu_img_json(*args: str) -> Any: + """ + Run qemu-img and return its output as deserialized JSON. + + :raise CalledProcessError: + When qemu-img crashes, or returns a non-zero exit code without + producing a valid JSON document to stdout. + :raise JSONDecoderError: + When qemu-img returns 0, but failed to produce a valid JSON document. + + :return: A deserialized JSON object; probably a dict[str, Any]. + """ + try: + res = qemu_img(*args, combine_stdio=False) + except subprocess.CalledProcessError as exc: + # Terminated due to signal. Don't bother. + if exc.returncode < 0: + raise + + # Commands like 'check' can return failure (exit codes 2 and 3) + # to indicate command completion, but with errors found. For + # multi-command flexibility, ignore the exact error codes and + # *try* to load JSON. + try: + return json.loads(exc.stdout) + except json.JSONDecodeError: + # Nope. This thing is toast. Raise the /process/ error. + pass + raise + + return json.loads(res.stdout) + def qemu_img_measure(*args): return json.loads(qemu_img_pipe("measure", "--output", "json", *args)) |