From: Jeff King <peff@peff.net>
To: "SZEDER Gábor" <szeder@ira.uka.de>
Cc: git@vger.kernel.org
Subject: Re: [PATCH 17/25] t0020: use modern test_* helpers
Date: Tue, 24 Mar 2015 22:56:35 -0400 [thread overview]
Message-ID: <20150325025635.GC15051@peff.net> (raw)
In-Reply-To: <20150325012323.Horde.zCWvV1mF8OBE1PxYPuuEFg8@webmail.informatik.kit.edu>
On Wed, Mar 25, 2015 at 01:23:23AM +0100, SZEDER Gábor wrote:
> > for f in one dir/two
> > do
> > append_cr <$f >tmp && mv -f tmp $f &&
> >- git update-index -- $f || {
> >- echo Oops
> >- false
> >- break
> >- }
> >+ git update-index -- $f ||
> >+ break
> > done &&
>
> Ah, these tests are evil, I remember them from the time when I was fiddling
> with Jonathan's patch. They can fail silently without testing what they
> were supposed to test.
>
> If something in the loop fails, the break will leave the loop but it will do
> so with zero return value and, consequently, the test will continue as if
> everything were OK.
> And unless it was 'git update-index' that failed in a way that left a borked
> index behind, the 'git diff-index --cached' below will not error out or
> produce some output that would cause the test to fail. i.e. I tried e.g.
>
> append_cr <$f >tmp && mv -f tmp $f && false &&
>
> in the loop and the test succeeded.
Ugh, you're right. I remembered that for loops were tricky in &&-chains,
but for some reason was thinking that "break" would give you the last
exit code, But I just re-tested, and of course it does not work.
> I think the best fix would be to unroll the loop: after this patch the loop
> body consists of only two significant lines and we iterate through the loop
> only twice, so the test would be even shorter.
Yeah, unrolling may be the best thing here, given the size of the loops.
As a general rule, I think it has to be a subshell with an exit, like:
(
for i in one two three; do
echo $i &&
test $i = one ||
exit 1
done
)
echo exit=$?
which should yield one, two, and exit=1. 7b1732c (t7510: use consistent
&&-chains in loop, 2014-06-16) deals with this in another test.
-Peff
next prev parent reply other threads:[~2015-03-25 2:56 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-20 10:04 [PATCH 0/25] detecting &&-chain breakage Jeff King
2015-03-20 10:05 ` [PATCH 01/25] t/test-lib: introduce --chain-lint option Jeff King
2015-03-25 2:53 ` SZEDER Gábor
2015-03-25 3:05 ` Jeff King
2015-03-20 10:06 ` [PATCH 02/25] t: fix severe &&-chain breakage Jeff King
2015-03-20 10:06 ` [PATCH 03/25] t: fix moderate " Jeff King
2015-03-20 10:07 ` [PATCH 04/25] t: fix trivial " Jeff King
2015-03-20 10:07 ` [PATCH 05/25] t: assume test_cmp produces verbose output Jeff King
2015-03-20 10:09 ` [PATCH 06/25] t: use verbose instead of hand-rolled errors Jeff King
2015-03-20 10:09 ` [PATCH 07/25] t: use test_must_fail instead of hand-rolled blocks Jeff King
2015-03-20 10:10 ` [PATCH 08/25] t: fix &&-chaining issues around setup which might fail Jeff King
2015-03-20 10:11 ` [PATCH 09/25] t: use test_might_fail for diff and grep Jeff King
2015-03-20 10:11 ` [PATCH 10/25] t: use test_expect_code instead of hand-rolled comparison Jeff King
2015-03-20 10:12 ` [PATCH 11/25] t: wrap complicated expect_code users in a block Jeff King
2015-03-20 10:12 ` [PATCH 12/25] t: avoid using ":" for comments Jeff King
2015-03-20 10:12 ` [PATCH 13/25] t3600: fix &&-chain breakage for setup commands Jeff King
2015-03-20 10:12 ` [PATCH 14/25] t7201: fix &&-chain breakage Jeff King
2015-03-20 10:13 ` [PATCH 15/25] t9502: " Jeff King
2015-03-20 17:48 ` Johannes Sixt
2015-03-20 18:03 ` Jeff King
2015-03-20 10:13 ` [PATCH 16/25] t6030: use modern test_* helpers Jeff King
2015-03-20 10:13 ` [PATCH 17/25] t0020: " Jeff King
2015-03-25 0:23 ` SZEDER Gábor
2015-03-25 2:56 ` Jeff King [this message]
2015-03-25 5:24 ` [PATCH 0/8] more &&-chaining test fixups Jeff King
2015-03-25 5:25 ` [PATCH 1/8] perf-lib: fix ignored exit code inside loop Jeff King
2015-03-25 5:28 ` [PATCH 2/8] t0020: fix ignored exit code inside loops Jeff King
2015-03-25 5:28 ` [PATCH 3/8] t3305: fix ignored exit code inside loop Jeff King
2015-03-25 8:40 ` Johan Herland
2015-03-25 5:29 ` [PATCH 4/8] t7701: " Jeff King
2015-03-25 5:29 ` [PATCH 5/8] t: fix some trivial cases of ignored exit codes in loops Jeff King
2015-03-25 5:30 ` [PATCH 6/8] t: simplify loop exit-code status variables Jeff King
2015-03-25 17:27 ` Junio C Hamano
2015-03-25 17:43 ` Jeff King
2015-03-25 5:31 ` [PATCH 7/8] t0020: use test_* helpers instead of hand-rolled messages Jeff King
2015-03-25 5:32 ` [PATCH 8/8] t9001: drop save_confirm helper Jeff King
2015-03-25 17:29 ` [PATCH 0/8] more &&-chaining test fixups Junio C Hamano
2015-03-20 10:13 ` [PATCH 18/25] t1301: use modern test_* helpers Jeff King
2015-03-24 23:51 ` SZEDER Gábor
2015-03-25 2:45 ` Jeff King
2015-03-20 10:13 ` [PATCH 19/25] t6034: " Jeff King
2015-03-24 23:43 ` SZEDER Gábor
2015-03-20 10:13 ` [PATCH 20/25] t4117: " Jeff King
2015-03-20 10:13 ` [PATCH 21/25] t9001: use test_when_finished Jeff King
2015-03-25 2:00 ` SZEDER Gábor
2015-03-25 2:47 ` Jeff King
2015-03-20 10:13 ` [PATCH 22/25] t0050: appease --chain-lint Jeff King
2015-03-20 10:13 ` [PATCH 23/25] t7004: fix embedded single-quotes Jeff King
2015-03-20 10:13 ` [PATCH 24/25] t0005: fix broken &&-chains Jeff King
2015-03-20 10:13 ` [PATCH 25/25] t4104: drop hand-rolled error reporting Jeff King
2015-03-20 10:23 ` [PATCH 0/25] detecting &&-chain breakage Jeff King
2015-03-20 14:28 ` Michael J Gruber
2015-03-20 14:32 ` [PATCH 26/27] t/*svn*: fix moderate " Michael J Gruber
2015-03-20 14:32 ` [PATCH 27/27] t9104: fix test for following larger parents Michael J Gruber
2015-03-20 18:04 ` [PATCH 26/27] t/*svn*: fix moderate &&-chain breakage Junio C Hamano
2015-03-20 19:35 ` Junio C Hamano
2015-03-20 20:02 ` Jeff King
2015-03-20 20:13 ` Jeff King
2015-03-23 9:36 ` Michael J Gruber
2015-03-20 17:57 ` [PATCH 0/25] detecting " Jeff King
2015-03-20 17:44 ` Junio C Hamano
2015-03-20 18:00 ` Junio C Hamano
2015-03-20 18:04 ` Jeff King
2015-03-20 18:33 ` Junio C Hamano
2015-03-20 23:18 ` Eric Sunshine
2015-03-21 8:19 ` Jeff King
2015-03-21 18:01 ` Junio C Hamano
2015-03-21 22:23 ` Jeff King
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20150325025635.GC15051@peff.net \
--to=peff@peff.net \
--cc=git@vger.kernel.org \
--cc=szeder@ira.uka.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).