QA output created by 188
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=16777216

== reading whole image ==
read 16777216/16777216 bytes at offset 0
16 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

== rewriting whole image ==
wrote 16777216/16777216 bytes at offset 0
16 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

== verify pattern ==
read 16777216/16777216 bytes at offset 0
16 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

== verify open failure with wrong password ==
qemu-io: can't open: Invalid password, cannot unlock any keyslot

== verify that has_zero_init returns false when preallocating ==
Formatting 'TEST_DIR/t.IMGFMT.orig', fmt=IMGFMT size=16777216
Images are identical.
*** done