[PATCH v3 5/4] iotests: Enhance 223 to cover qemu-img map improvements

[Eric Blake <eblake@redhat.com>]

Since qemu-img map + x-dirty-bitmap remains the easiest way to read
persistent bitmaps at the moment, it makes a reasonable place to add
coverage to ensure we do not regress on the just-added parameters to
qemu-img map.

Signed-off-by: Eric Blake <eblake@redhat.com>
---

My enthusiasm got the better of me - I whipped out this patch instead
of waiting for Eyal's response ;)

 tests/qemu-iotests/223     | 6 ++++--
 tests/qemu-iotests/223.out | 3 ++-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/tests/qemu-iotests/223 b/tests/qemu-iotests/223
index 56fbc5fb09a0..d68bc3cb6f1a 100755
--- a/tests/qemu-iotests/223
+++ b/tests/qemu-iotests/223
@@ -2,7 +2,7 @@
 #
 # Test reading dirty bitmap over NBD
 #
-# Copyright (C) 2018-2019 Red Hat, Inc.
+# Copyright (C) 2018-2020 Red Hat, Inc.
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -206,7 +206,9 @@ $QEMU_IMG map --output=json --image-opts \

 nbd_server_start_unix_socket -f $IMGFMT -B b2 "$TEST_IMG"
 IMG="driver=nbd,server.type=unix,server.path=$nbd_unix_socket"
-$QEMU_IMG map --output=json --image-opts \
+$QEMU_IMG map --output=json --image-opts --max-length=12345 \
+  "$IMG,x-dirty-bitmap=qemu:dirty-bitmap:b2" | _filter_qemu_img_map
+$QEMU_IMG map --output=json --image-opts --start-offset=12345 \
   "$IMG,x-dirty-bitmap=qemu:dirty-bitmap:b2" | _filter_qemu_img_map

 # success, all done
diff --git a/tests/qemu-iotests/223.out b/tests/qemu-iotests/223.out
index 80c0cf65095b..e1eaaedb55b3 100644
--- a/tests/qemu-iotests/223.out
+++ b/tests/qemu-iotests/223.out
@@ -201,6 +201,7 @@ read 2097152/2097152 bytes at offset 2097152
 { "start": 2097152, "length": 2097152, "depth": 0, "zero": false, "data": false}]
 [{ "start": 0, "length": 512, "depth": 0, "zero": false, "data": true, "offset": OFFSET},
 { "start": 512, "length": 512, "depth": 0, "zero": false, "data": false},
-{ "start": 1024, "length": 2096128, "depth": 0, "zero": false, "data": true, "offset": OFFSET},
+{ "start": 1024, "length": 11321, "depth": 0, "zero": false, "data": true, "offset": OFFSET}]
+[{ "start": 12345, "length": 2084807, "depth": 0, "zero": false, "data": true, "offset": OFFSET},
 { "start": 2097152, "length": 2097152, "depth": 0, "zero": false, "data": false}]
 *** done
-- 
2.26.2