Add testcase for scsi-hd devices without drive property

Lets add a test for scsi devices without a drive. This was broken
by a recent block patch, thus indicating that we need a testcase.
Suggested-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: NMax Reitz <mreitz@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

tests/qemu-iotests/051

@@ -98,6 +98,12 @@ run_qemu -drive file="$TEST_IMG",driver=foo
 run_qemu -drive file="$TEST_IMG",driver=raw,format=qcow2
 run_qemu -drive file="$TEST_IMG",driver=qcow2,format=qcow2
 
+echo
+echo === Device without drive ===
+echo
+
+run_qemu -device virtio-scsi-pci -device scsi-hd
+
 echo
 echo === Overriding backing file ===
 echo

tests/qemu-iotests/051.out

@@ -47,6 +47,14 @@ Testing: -drive file=TEST_DIR/t.qcow2,driver=qcow2,format=qcow2
 QEMU_PROG: -drive file=TEST_DIR/t.qcow2,driver=qcow2,format=qcow2: Cannot specify both 'driver' and 'format'
 
 
+=== Device without drive ===
+
+Testing: -device virtio-scsi-pci -device scsi-hd
+QEMU X.Y.Z monitor - type 'help' for more information
+(qemu) QEMU_PROG: -device scsi-hd: drive property not set
+QEMU_PROG: -device scsi-hd: Device 'scsi-hd' could not be initialized
+
+
 === Overriding backing file ===
 
 Testing: -drive file=TEST_DIR/t.qcow2,driver=qcow2,backing.file.filename=TEST_DIR/t.qcow2.orig -nodefaults