Junio C Hamano wrote:

> A more preferrable alternative may be adding something like this to
> test-lib.sh and call it from here and elsewhere (there are about 50
> places that do "test ! -s <filename>"), perhaps?
>         test_must_be_an_empty_file () {
>                 if test -s "$1"
>                 then
>                         cat "$1"
>                         false
>                 fi
>         }

I generally just use the two-liner

        >empty &&
        test_cmp empty output

directly in cases like this.

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