Re: [PATCH v3] t1410-reflog.sh: avoid suppressing git's exit code in pipelines

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

Gatla Vishweshwar Reddy <gatlavishweshwarreddy26@gmail.com> writes:

> Piping git commands directly to wc -l suppresses the exit code of
> git, hiding potential failures from the test suite.

Correct.

> Capture the
> output to a temporary file first, then count the lines separately
> to preserve the exit code. Where the expected count is known ahead
> of time, use test_stdout_line_count instead.

Technically, the description is not telling any lies about the
solution, but the patch no longer does the caputuring or counting
itself at all.  Rather, it exclusively uses test_stdout_line_count,
which internally does the saving to a temporary and counting the
lines ;-)

The changes in the patch are mostly good, except for the loss of a
blank line that separates two test pieces in the last hunk (below).

> @@ -319,13 +311,12 @@ test_expect_success 'git reflog expire unknown reference' '
>  	test_must_fail git reflog expire does-not-exist 2>stderr &&
>  	test_grep "error: reflog could not be found: ${SQ}does-not-exist${SQ}" stderr
>  '
> -
>  test_expect_success 'checkout should not delete log for packed ref' '
> -	test $(git reflog main | wc -l) = 4 &&
> +	test_stdout_line_count = 4 git reflog main &&
>  	git branch foo &&
>  	git pack-refs --all &&
>  	git checkout foo &&
> -	test $(git reflog main | wc -l) = 4
> +	test_stdout_line_count = 4 git reflog main
>  '
>
>  test_expect_success 'stale dirs do not cause d/f conflicts (reflogs on)' '

Thanks.