is_deeply([$oid_hex, $type, $size], \@x, 'got expected header');
is($arg_res, $arg, 'arg passed to cat_async');
is_deeply($raw, $bref, 'blob result matches');
is_deeply([$oid_hex, $type, $size], \@x, 'got expected header');
is($arg_res, $arg, 'arg passed to cat_async');
is_deeply($raw, $bref, 'blob result matches');