iotests: Perform the correct test in 082

In the "amend" section of 082, we perform a single "convert" test
(namely "convert -o help").  That does not make sense, especially
because we have done exactly that "convert" test earlier in 082 already.

Replacing "convert" by "amend" yields an error, which is correct because
there is no point in "amend" having a default format.  The user has to
either specify the format, or give a file for qemu-img to probe.
Signed-off-by: NMax Reitz <mreitz@redhat.com>
Reviewed-by: NJohn Snow <jsnow@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

tests/qemu-iotests/082

@@ -212,7 +212,10 @@ run_qemu_img amend -f $IMGFMT -o backing_file="$TEST_IMG" -o ,, -o help "$TEST_I
 
 # Leave out everything that isn't needed
 run_qemu_img amend -f $IMGFMT -o help
-run_qemu_img convert -o help
+
+# amend requires specifying either a format explicitly, or a file
+# which it can probe
+run_qemu_img amend -o help
 
 # Try help option for a format that does not support amendment
 run_qemu_img amend -f bochs -o help

tests/qemu-iotests/082.out

@@ -831,9 +831,8 @@ Creation options for 'qcow2':
 
 Note that not all of these options may be amendable.
 
-Testing: convert -o help
-Supported options:
-  size=<size>            - Virtual disk size
+Testing: amend -o help
+qemu-img: Expecting one image file name
 
 Testing: amend -f bochs -o help
 qemu-img: Format driver 'bochs' does not support option amendment