From 1f4b774a6444575b86f27b17d3d01e4f41df6581 Mon Sep 17 00:00:00 2001 From: Vladimir Sementsov-Ogievskiy Date: Wed, 1 Jul 2020 13:53:28 +0300 Subject: [PATCH] iotests.py: QemuIoInteractive: print output on failure Make it simpler to debug when qemu-io fails due to wrong arguments or environment. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Eric Blake Message-Id: <20200701105331.121670-3-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake --- tests/qemu-iotests/iotests.py | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py index 109fb3884a..2a08fea3c9 100644 --- a/tests/qemu-iotests/iotests.py +++ b/tests/qemu-iotests/iotests.py @@ -217,7 +217,13 @@ class QemuIoInteractive: stdout=subprocess.PIPE, stderr=subprocess.STDOUT, universal_newlines=True) - assert self._p.stdout.read(9) == 'qemu-io> ' + out = self._p.stdout.read(9) + if out != 'qemu-io> ': + # Most probably qemu-io just failed to start. + # Let's collect the whole output and exit. + out += self._p.stdout.read() + self._p.wait(timeout=1) + raise ValueError(out) def close(self): self._p.communicate('q\n') -- 2.11.4.GIT