Re: [Qemu-devel] [PATCH] iotests: Fix 061's reference output

[Kevin Wolf <kwolf@redhat.com>]

Am 03.03.2015 um 20:57 hat Max Reitz geschrieben:
> As of commit dc523cd348c47372faa7271c9aab2030f94c290d, passing an unkown
> option name for image creation no longer results in that option's name
> printed. This affects iotest 061's output, fix it.
> 
> Signed-off-by: Max Reitz <mreitz@redhat.com>
> ---
>  tests/qemu-iotests/061.out | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/tests/qemu-iotests/061.out b/tests/qemu-iotests/061.out
> index e70f983..52f0a31 100644
> --- a/tests/qemu-iotests/061.out
> +++ b/tests/qemu-iotests/061.out
> @@ -287,7 +287,6 @@ Lazy refcounts only supported with compatibility level 1.1 and above (use compat
>  qemu-img: Error while amending options: Invalid argument
>  Unknown compatibility level 0.42.
>  qemu-img: Error while amending options: Invalid argument
> -qemu-img: Invalid parameter 'foo'
>  qemu-img: Invalid options for file format 'qcow2'
>  Changing the cluster size is not supported.
>  qemu-img: Error while amending options: Operation not supported

I think I would prefer a patch that primarily fixes the error message (I
would consider the recent change that removed the name of the unknown
option a usability regression that the test caught) and then changes the
test only as a byproduct.

Markus, throwing away the original error message like commit dc523cd3
does is almost always wrong. It's the callee that knows what exactly the
problem is; the caller may add context, but it rarely knows the details
better.

Kevin