qemu-iotests: add test case for dmg

Recently, some bugs in dmg file have been fixed. To prevent reading dmg
is broken someday in the future, add a simple test which ensures the
conversion from dmg to raw should not hang or face any I/O error.

Signed-off-by: yuchenlin <npes87184@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

tests/qemu-iotests/239

@@ -0,0 +1,53 @@
+#!/bin/bash
+#
+# Test case for dmg
+#
+# Copyright (C) 2019 yuchenlin <npes87184@gmail.com>
+#
+# 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
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+# creator
+owner=npes87184@gmail.com
+
+seq=`basename $0`
+echo "QA output created by $seq"
+
+status=1	# failure is the default!
+
+_cleanup()
+{
+    rm -f "$TEST_IMG.raw"
+    _cleanup_test_img
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common.rc
+
+_supported_fmt dmg
+_supported_proto file
+_supported_os Linux
+
+echo
+echo "== Testing conversion to raw should success =="
+_use_sample_img simple-dmg.dmg.bz2
+if ! $QEMU_IMG convert -f $IMGFMT -O raw "$TEST_IMG" "$TEST_IMG.raw" ; then
+    exit 1
+fi
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0

tests/qemu-iotests/239.out

@@ -0,0 +1,4 @@
+QA output created by 239
+
+== Testing conversion to raw should success ==
+*** done

tests/qemu-iotests/check

@@ -237,6 +237,7 @@ image format options
     -vhdx               test vhdx
     -vmdk               test vmdk
     -luks               test luks
+    -dmg                test dmg
 
 image protocol options
     -file               test file (default)
@@ -304,6 +305,12 @@ testlist options
             xpand=false
             ;;
 
+        -dmg)
+            IMGFMT=dmg
+            IMGFMT_GENERIC=false
+            xpand=false
+            ;;
+
         -qed)
             IMGFMT=qed
             xpand=false

tests/qemu-iotests/group

@@ -235,3 +235,4 @@
 235 auto quick
 236 auto quick
 238 auto quick
+239 rw auto quick