iotests: change supports_quorum to use qemu_img

Similar to other recent changes: use the qemu_img() invocation that
supports throwing loud, nasty exceptions when it fails for surprising
reasons.

(Why would "--help" ever fail? I don't know, but eliminating *all* calls
to qemu-img that do not go through qemu_img() is my goal, so
qemu_img_pipe() has to be removed.)

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220321201618.903471-12-jsnow@redhat.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>

diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index b3e793f78a0aa4013d4f2e4658b82be6d9b2ac85..aaf4da8be4c74288b4a57cf14d26de09aa3e702b 100644 (file)
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -1428,8 +1428,8 @@ def _verify_imgopts(unsupported: Sequence[str] = ()) -> None:
         notrun(f'not suitable for this imgopts: {imgopts}')
 
 
-def supports_quorum():
-    return 'quorum' in qemu_img_pipe('--help')
+def supports_quorum() -> bool:
+    return 'quorum' in qemu_img('--help').stdout
 
 def verify_quorum():
     '''Skip test suite if quorum support is not available'''