[PATCH 06/14] iotest 302: use img_info_log() helper

[Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>]

Instead of qemu_img_log("info", ..) use generic helper img_info_log().

img_info_log() has smarter logic. For example it use filter_img_info()
to filter output, which in turns filter a compression type. So it will
help us in future when we implement a possibility to use zstd
compression by default (with help of some runtime config file or maybe
build option). For now to test you should recompile qemu with a small
patch:

    --- a/block/qcow2.c
    +++ b/block/qcow2.c
    @@ -3540,6 +3540,11 @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp)
             }
         }

    +    if (!qcow2_opts->has_compression_type && version >= 3) {
    +        qcow2_opts->has_compression_type = true;
    +        qcow2_opts->compression_type = QCOW2_COMPRESSION_TYPE_ZSTD;
    +    }
    +
         if (qcow2_opts->has_compression_type &&
             qcow2_opts->compression_type != QCOW2_COMPRESSION_TYPE_ZLIB) {

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
 tests/qemu-iotests/302     | 3 ++-
 tests/qemu-iotests/302.out | 7 +++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/tests/qemu-iotests/302 b/tests/qemu-iotests/302
index 5695af4914..2180dbc896 100755
--- a/tests/qemu-iotests/302
+++ b/tests/qemu-iotests/302
@@ -34,6 +34,7 @@ from iotests import (
     qemu_img_measure,
     qemu_io,
     qemu_nbd_popen,
+    img_info_log,
 )
 
 iotests.script_initialize(supported_fmts=["qcow2"])
@@ -99,7 +100,7 @@ with tarfile.open(tar_file, "w") as tar:
             nbd_uri)
 
         iotests.log("=== Converted image info ===")
-        qemu_img_log("info", nbd_uri)
+        img_info_log(nbd_uri)
 
         iotests.log("=== Converted image check ===")
         qemu_img_log("check", nbd_uri)
diff --git a/tests/qemu-iotests/302.out b/tests/qemu-iotests/302.out
index e2f6077e83..3e7c281b91 100644
--- a/tests/qemu-iotests/302.out
+++ b/tests/qemu-iotests/302.out
@@ -6,14 +6,13 @@ virtual size: 448 KiB (458752 bytes)
 disk size: unavailable
 
 === Converted image info ===
-image: nbd+unix:///exp?socket=SOCK_DIR/PID-nbd-sock
-file format: qcow2
+image: TEST_IMG
+file format: IMGFMT
 virtual size: 1 GiB (1073741824 bytes)
-disk size: unavailable
 cluster_size: 65536
 Format specific information:
     compat: 1.1
-    compression type: zlib
+    compression type: COMPRESSION_TYPE
     lazy refcounts: false
     refcount bits: 16
     corrupt: false
-- 
2.29.2