Re: [PATCH] test-lib: don't check prereqs of test cases that won't be run anyway

> With './t1234-foo.sh -r 5,6' we can run only specific test cases in a
> test script, but our test framwork still evaluates all lazy prereqs
> that the excluded test cases might depend on.  This is unnecessary and
> produces verbose and trace output that can be distracting.  This has
> been an issue ever since the '-r|--run=' options were introduced in
> 0445e6f0a1 (test-lib: '--run' to run only specific tests, 2014-04-30),
> because that commit added the check of the list of test cases
> specified with '-r' after evaluating the prereqs.
>
> Avoid this unnecessary prereq evaluation by checking the list of test
> cases specified with '-r' before looking at the prereqs.
>
> Note that GIT_SKIP_TESTS has always been checked before the prereqs,
> so prereqs necessary for tests skipped that way were not evaluated.
>
> Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
> ---

>
> Following up on:
>
>   https://public-inbox.org/git/20190923165828.GA27068@szeder.dev/
>
>  t/test-lib.sh | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/t/test-lib.sh b/t/test-lib.sh
> index e06fa02a0e..24b541f494 100644
> --- a/t/test-lib.sh
> +++ b/t/test-lib.sh
> @@ -1000,6 +1000,12 @@ test_skip () {
>  		to_skip=t
>  		skipped_reason="GIT_SKIP_TESTS"
>  	fi
> +	if test -z "$to_skip" && test -n "$run_list" &&
> +	   ! match_test_selector_list '--run' $test_count "$run_list"
> +	then
> +		to_skip=t
> +		skipped_reason="--run"
> +	fi
>  	if test -z "$to_skip" && test -n "$test_prereq" &&
>  	   ! test_have_prereq "$test_prereq"
>  	then
> @@ -1012,12 +1018,6 @@ test_skip () {
>  		fi
>  		skipped_reason="missing $missing_prereq${of_prereq}"
>  	fi
> -	if test -z "$to_skip" && test -n "$run_list" &&
> -		! match_test_selector_list '--run' $test_count "$run_list"
> -	then
> -		to_skip=t
> -		skipped_reason="--run"
> -	fi
>
>  	case "$to_skip" in
>  	t)
> --
> 2.24.0.388.gde53c094ea
>
>