Re: [PATCH 2/2] iotests/303: Check for zstd support

[Thomas Huth <thuth@redhat.com>]

On 21/02/2022 18.08, Hanna Reitz wrote:
> 303 runs two test cases, one of which requires zstd support.
> Unfortunately, given that this is not a unittest-style test, we cannot
> easily skip that single case, and instead can only skip the whole test.
> 
> (Alternatively, we could split this test into a zlib and a zstd part,
> but that seems excessive, given that this test is not in auto and thus
> likely only run by developers who have zstd support compiled in.)
> 
> Fixes: 677e0bae686e7c670a71d1f ("iotest 303: explicit compression type")
> Signed-off-by: Hanna Reitz <hreitz@redhat.com>
> ---
>   tests/qemu-iotests/303 | 15 +++++++++++----
>   1 file changed, 11 insertions(+), 4 deletions(-)
> 
> diff --git a/tests/qemu-iotests/303 b/tests/qemu-iotests/303
> index 16c2e10827..5a3efb4ba3 100755
> --- a/tests/qemu-iotests/303
> +++ b/tests/qemu-iotests/303
> @@ -21,7 +21,8 @@
>   
>   import iotests
>   import subprocess
> -from iotests import qemu_img_create, qemu_io, file_path, log, filter_qemu_io
> +from iotests import notrun, qemu_img_pipe_and_status, qemu_io, file_path, \
> +        log, filter_qemu_io
>   
>   iotests.script_initialize(supported_fmts=['qcow2'],
>                             unsupported_imgopts=['refcount_bits', 'compat'])
> @@ -55,9 +56,15 @@ def add_bitmap(num, begin, end, disabled):
>   
>   
>   def test(compression_type: str, json_output: bool) -> None:
> -    qemu_img_create('-f', iotests.imgfmt,
> -                    '-o', f'compression_type={compression_type}',
> -                    disk, '10M')
> +    opts = f'compression_type={compression_type}'
> +    output, status = qemu_img_pipe_and_status('create',
> +                                              '-f', iotests.imgfmt,
> +                                              '-o', opts,
> +                                              disk, '10M')
> +    if status == 1 and \
> +            "'compression-type' does not accept value 'zstd'" in output:
> +        notrun('zstd compression not supported')
> +
>       add_bitmap(1, 0, 6, False)
>       add_bitmap(2, 6, 8, True)
>   

303 was failing on my system, too, but I did not get around to investigate 
on that one yet - so thanks for fixing this pro-actively! Now the test is 
correctly skipped on my system.

Tested-by: Thomas Huth <thuth@redhat.com>