[PATCH 4/4] iotests: add test for snapshot on top of node with compress filter

[Fiona Ebner <f.ebner@proxmox.com>]

Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
---
 tests/qemu-iotests/085     | 18 ++++++++++++++++++
 tests/qemu-iotests/085.out | 21 +++++++++++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/tests/qemu-iotests/085 b/tests/qemu-iotests/085
index 3fb7b0b5c8..5063e3e8d2 100755
--- a/tests/qemu-iotests/085
+++ b/tests/qemu-iotests/085
@@ -270,6 +270,24 @@ _send_qemu_cmd $h "{ 'execute': 'blockdev-snapshot',
                                     'overlay':'snap_${SNAPSHOTS}' }
                    }" "error"
 
+echo
+echo === Add snapshot in combination with compress filter ===
+echo
+
+SNAPSHOTS=$((${SNAPSHOTS}+1))
+add_snapshot_image ${SNAPSHOTS}
+
+_send_qemu_cmd $h "{ 'execute': 'blockdev-add',
+                     'arguments': { 'driver':'compress',
+                                    'node-name':'compress',
+                                    'file':'virtio0' }
+                   }" "return"
+
+_send_qemu_cmd $h "{ 'execute': 'blockdev-snapshot',
+                     'arguments': { 'node':'compress',
+                                    'overlay':'snap_${SNAPSHOTS}' }
+                   }" "return"
+
 # success, all done
 echo "*** done"
 rm -f $seq.full
diff --git a/tests/qemu-iotests/085.out b/tests/qemu-iotests/085.out
index b543b992ff..57d68f3bb9 100644
--- a/tests/qemu-iotests/085.out
+++ b/tests/qemu-iotests/085.out
@@ -255,4 +255,25 @@ Formatting 'TEST_DIR/15-snapshot-v0.IMGFMT', fmt=IMGFMT size=134217728 backing_f
                                     'overlay':'snap_15' }
                    }
 {"error": {"class": "GenericError", "desc": "Cannot find device='nodevice' nor node-name='nodevice'"}}
+
+=== Add snapshot in combination with compress filter ===
+
+Formatting 'TEST_DIR/16-snapshot-v0.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/15-snapshot-v0.IMGFMT backing_fmt=IMGFMT
+{ 'execute': 'blockdev-add', 'arguments':
+           { 'driver': 'IMGFMT', 'node-name': 'snap_16', 'backing': null,
+             'file':
+             { 'driver': 'file', 'filename': 'TEST_DIR/16-snapshot-v0.IMGFMT',
+               'node-name': 'file_16' } } }
+{"return": {}}
+{ 'execute': 'blockdev-add',
+                     'arguments': { 'driver':'compress',
+                                    'node-name':'compress',
+                                    'file':'virtio0' }
+                   }
+{"return": {}}
+{ 'execute': 'blockdev-snapshot',
+                     'arguments': { 'node':'compress',
+                                    'overlay':'snap_16' }
+                   }
+{"return": {}}
 *** done
-- 
2.39.5