Re: [PATCH v1 1/1] test: Correct detection of UTF8_NFD_TO_NFC for APFS

[Junio C Hamano <gitster@pobox.com>]

tboegi@web.de writes:

> From: Torsten Bögershausen <tboegi@web.de>
>
> On HFS (which is the default Mac filesystem prior to High Sierra),
> unicode names are "decomposed" before recording.
> On APFS, which appears to be the new default filesystem in Mac OS High
> Sierra, filenames are recorded as specified by the user.
>
> APFS continues to allow the user to access it via any name
> that normalizes to the same thing.
>
> This difference causes t0050-filesystem.sh to fail two tests.
>
> Improve the test for a NFD/NFC in test-lib.sh:
> Test if the same file can be reached in pre- and decomposed unicode.
>
> Reported-By: Elijah Newren <newren@gmail.com>
> Signed-off-by: Torsten Bögershausen <tboegi@web.de>
> ---
>  t/test-lib.sh | 7 +------
>  1 file changed, 1 insertion(+), 6 deletions(-)

Thanks.  

Wouldn't it logically make more sense to check for the target being
an existing file with "-f"?  It is not an essential part of the test
for the target to be "readable", but "can be stat(2)ed with the
other UTF-8 representation" is.

> diff --git a/t/test-lib.sh b/t/test-lib.sh
> index ea2bbaaa7a..e206250d1b 100644
> --- a/t/test-lib.sh
> +++ b/t/test-lib.sh
> @@ -1106,12 +1106,7 @@ test_lazy_prereq UTF8_NFD_TO_NFC '
>  	auml=$(printf "\303\244")
>  	aumlcdiar=$(printf "\141\314\210")
>  	>"$auml" &&
> -	case "$(echo *)" in
> -	"$aumlcdiar")
> -		true ;;
> -	*)
> -		false ;;
> -	esac
> +	test -r "$aumlcdiar"
>  '
>  
>  test_lazy_prereq AUTOIDENT '