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From: Taylor Blau <me@ttaylorr.com>
To: Junio C Hamano <gitster@pobox.com>
Cc: Johannes Sixt <j6t@kdbg.org>, Taylor Blau <me@ttaylorr.com>,
	Denton Liu <liu.denton@gmail.com>,
	Git Mailing List <git@vger.kernel.org>
Subject: Re: Re* [PATCH 0/4] t: replace incorrect test_must_fail usage (part 5)
Date: Wed, 29 Apr 2020 15:49:06 -0600	[thread overview]
Message-ID: <20200429214906.GA12075@syl.local> (raw)
In-Reply-To: <xmqqblnaufyt.fsf_-_@gitster.c.googlers.com>

On Wed, Apr 29, 2020 at 02:42:02PM -0700, Junio C Hamano wrote:
> Johannes Sixt <j6t@kdbg.org> writes:
>
> > Am 29.04.20 um 21:50 schrieb Taylor Blau:
> >> This comment has nothing to do with your series, but I am curious if you
> >> are planning on touching 'test_might_fail' at all. These can be useful
> >> for non-Git commands, too, such as 'test_might_fail umask 022' on
> >> systems that may or may not do something sensible with umask.
> >
> > When it's not a git command that might fail, the idiom is
> >
> > 	... &&
> > 	{ umask 022 || :; } &&
> > 	...
> >
> > -- Hannes
>
> I hoped to find this documented in t/README, but ended up writing
> this.  Overkill?  I dunno.
>
> -- >8 --
> Subject: [PATCH] t/README: document when not to use test_might_fail
>
> Signed-off-by: Junio C Hamano <gitster@pobox.com>
> ---
>  t/README | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/t/README b/t/README
> index 13747f1344..870950c7d1 100644
> --- a/t/README
> +++ b/t/README
> @@ -875,7 +875,9 @@ library for your script to use.
>   - test_might_fail [<options>] <git-command>
>
>     Similar to test_must_fail, but tolerate success, too.  Use this
> -   instead of "<git-command> || :" to catch failures due to segv.
> +   instead of "<git-command> || :" to catch failures due to segv,
> +   but do use "{ <non-git-command> || :; }" to ignore a failure from
> +   a command that is not git.

Hmm. I say this as somebody who just re-rolled a series to add two
'test_might_fail umask 022' lines, so am a little disappointed to learn
that this is not considered to be idiomatic.

To me this seems a little overkill, but it may not be on environments
where an extra subshell incurred by 'test_might_fail' might be overly
expensive.

Junio: do you want another reroll of that series? :/

>     Accepts the same options as test_must_fail.

Thanks,
Taylor

  reply	other threads:[~2020-04-29 21:51 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-29 12:22 [PATCH 0/4] t: replace incorrect test_must_fail usage (part 5) Denton Liu
2020-04-29 12:22 ` [PATCH 1/4] lib-submodule-update: add space after function name Denton Liu
2020-04-29 12:22 ` [PATCH 2/4] lib-submodule-update: consolidate --recurse-submodules Denton Liu
2020-04-29 18:06   ` Junio C Hamano
2020-04-29 12:22 ` [PATCH 3/4] lib-submodule-update: prepend "git" to $command Denton Liu
2020-04-29 12:22 ` [PATCH 4/4] lib-submodule-update: pass OVERWRITING_FAIL Denton Liu
2020-04-29 19:24   ` Junio C Hamano
2020-04-30  1:10     ` Denton Liu
2020-04-30  3:41       ` Junio C Hamano
2020-04-30  9:22         ` Denton Liu
2020-04-30 10:25   ` [PATCH v1.1] " Denton Liu
2020-04-30 20:38     ` Junio C Hamano
2020-05-01  9:35       ` Denton Liu
2020-05-01 16:51         ` Junio C Hamano
2020-05-05 11:43     ` [PATCH v1.2] " Denton Liu
2020-04-29 19:50 ` [PATCH 0/4] t: replace incorrect test_must_fail usage (part 5) Taylor Blau
2020-04-29 21:30   ` Johannes Sixt
2020-04-29 21:42     ` Re* " Junio C Hamano
2020-04-29 21:49       ` Taylor Blau [this message]
2020-04-29 22:10         ` Junio C Hamano
2020-04-29 22:16           ` Taylor Blau
2020-04-29 22:36         ` Junio C Hamano
2020-04-29 22:41           ` Taylor Blau
2020-04-29 22:00       ` Eric Sunshine
2020-04-29 22:06         ` Junio C Hamano
2020-05-21  0:24 ` [PATCH v2 " Denton Liu
2020-05-21  0:24   ` [PATCH v2 1/4] lib-submodule-update: add space after function name Denton Liu
2020-05-21  0:24   ` [PATCH v2 2/4] lib-submodule-update: consolidate --recurse-submodules Denton Liu
2020-05-21  0:24   ` [PATCH v2 3/4] lib-submodule-update: prepend "git" to $command Denton Liu
2020-05-21 10:39     ` Philip Oakley
2020-05-21 11:25       ` Denton Liu
2020-05-21  0:24   ` [PATCH v2 4/4] lib-submodule-update: pass OVERWRITING_FAIL Denton Liu
2020-05-21 18:29     ` Jeff King
2020-05-21 18:55       ` Denton Liu
2020-05-21 21:11       ` Junio C Hamano
2020-05-21 22:37         ` Jeff King
2020-05-21 18:34     ` Jeff King
2020-05-21 16:47   ` [PATCH v2 0/4] t: replace incorrect test_must_fail usage (part 5) Junio C Hamano
2020-05-21 18:35     ` Jeff King
2020-06-11 17:41 ` [PATCH v3 " Denton Liu
2020-06-11 17:41   ` [PATCH v3 1/4] lib-submodule-update: add space after function name Denton Liu
2020-06-11 17:41   ` [PATCH v3 2/4] lib-submodule-update: consolidate --recurse-submodules Denton Liu
2020-06-11 17:41   ` [PATCH v3 3/4] lib-submodule-update: prepend "git" to $command Denton Liu
2020-06-11 17:41   ` [PATCH v3 4/4] lib-submodule-update: use callbacks in test_submodule_switch_common() Denton Liu
2020-06-12 18:46     ` Junio C Hamano
2020-06-18  6:11     ` Junio C Hamano
2020-06-18  8:49   ` [PATCH v4 0/4] t: replace incorrect test_must_fail usage (part 5) Denton Liu
2020-06-18  8:49     ` [PATCH v4 1/4] lib-submodule-update: add space after function name Denton Liu
2020-06-18  8:49     ` [PATCH v4 2/4] lib-submodule-update: consolidate --recurse-submodules Denton Liu
2020-06-18  8:49     ` [PATCH v4 3/4] lib-submodule-update: prepend "git" to $command Denton Liu
2020-06-18  8:49     ` [PATCH v4 4/4] lib-submodule-update: use callbacks in test_submodule_switch_common() Denton Liu
2020-06-18 18:15       ` Jeff King
2020-06-23 10:28     ` [PATCH v5 0/4] t: replace incorrect test_must_fail usage (part 5) Denton Liu
2020-06-23 10:28       ` [PATCH v5 1/4] lib-submodule-update: add space after function name Denton Liu
2020-06-23 10:28       ` [PATCH v5 2/4] lib-submodule-update: consolidate --recurse-submodules Denton Liu
2020-06-23 10:28       ` [PATCH v5 3/4] lib-submodule-update: prepend "git" to $command Denton Liu
2020-06-23 10:28       ` [PATCH v5 4/4] lib-submodule-update: use callbacks in test_submodule_switch_common() Denton Liu
2020-06-23 18:40       ` [PATCH v5 0/4] t: replace incorrect test_must_fail usage (part 5) Jeff King
2020-06-23 20:21       ` [PATCH v5.1] lib-submodule-update: pass 'test_must_fail' as an argument Denton Liu
2020-06-23 23:54         ` Junio C Hamano
2020-06-24  0:16         ` Đoàn Trần Công Danh
2020-06-24  8:50         ` [PATCH v5.2] " Denton Liu
2020-06-24 16:00           ` Junio C Hamano
2020-06-23 20:35       ` [PATCH v5.1] " Denton Liu

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