The read binary data as text via a PPM export of the frame buffer seems a bit sketchy and it did blow up in the real world when the assertion failed:
https://gitlab.com/qemu-project/qemu/-/jobs/943183183 However short of cleaning up the test to be more binary focused at least limit the attempt to dump the whole file as hexified zeros in the logs. Signed-off-by: Alex Bennée <alex.ben...@linaro.org> Reviewed-by: Daniel P. Berrangé <berra...@redhat.com> Reviewed-by: Willian Rampazzo <willi...@redhat.com> Acked-by: Halil Pasic <pa...@linux.ibm.com> Acked-by: Thomas Huth <th...@redhat.com> Message-Id: <20210105124405.15424-1-alex.ben...@linaro.org> diff --git a/tests/acceptance/machine_s390_ccw_virtio.py b/tests/acceptance/machine_s390_ccw_virtio.py index 0f81af9950..eccf26b262 100644 --- a/tests/acceptance/machine_s390_ccw_virtio.py +++ b/tests/acceptance/machine_s390_ccw_virtio.py @@ -241,7 +241,7 @@ class S390CCWVirtioMachine(Test): self.assertEqual(line, b"1024 768\n") line = ppmfile.readline() self.assertEqual(line, b"255\n") - line = ppmfile.readline() + line = ppmfile.readline(256) self.assertEqual(line, b"The quick fox jumps over a lazy dog\n") # Hot-plug a virtio-crypto device and see whether it gets accepted -- 2.20.1