From: Johannes Schindelin <Johannes.Schindelin@gmx.de>
To: Junio C Hamano <gitster@pobox.com>
Cc: git@vger.kernel.org, "Michael Rappazzo" <rappazzo@gmail.com>,
"Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>
Subject: Re: [PATCH v2 1/2] rev-parse tests: add tests executed from a subdirectory
Date: Fri, 17 Feb 2017 17:55:41 +0100 (CET) [thread overview]
Message-ID: <alpine.DEB.2.20.1702171753340.3496@virtualbox> (raw)
In-Reply-To: <xmqqshnllw2f.fsf@gitster.mtv.corp.google.com>
Hi Junio,
On Fri, 10 Feb 2017, Junio C Hamano wrote:
> Johannes Schindelin <johannes.schindelin@gmx.de> writes:
>
> > diff --git a/t/t1700-split-index.sh b/t/t1700-split-index.sh
> > index 292a0720fcc..1d6e27a09d8 100755
> > --- a/t/t1700-split-index.sh
> > +++ b/t/t1700-split-index.sh
> > @@ -200,4 +200,21 @@ EOF
> > test_cmp expect actual
> > '
> >
> > +test_expect_failure 'rev-parse --shared-index-path' '
> > + rm -rf .git &&
> > + test_create_repo . &&
> > + git update-index --split-index &&
> > + ls -t .git/sharedindex* | tail -n 1 >expect &&
> > + git rev-parse --shared-index-path >actual &&
> > + test_cmp expect actual &&
> > + mkdir work &&
> > + test_when_finished "rm -rf work" &&
> > + (
> > + cd work &&
> > + ls -t ../.git/sharedindex* | tail -n 1 >expect &&
> > + git rev-parse --shared-index-path >actual &&
> > + test_cmp expect actual
> > + )
>
> This looks iffy.
Indeed.
> If we expect multiple sharedindex* files, the first output from "ls -t"
> may or may not match the real one in use (multiple things do happen
> within a single second or whatever your filesystem's time granularity
> is). Two "ls -t" run in this test would (hopefully) give stable
> results, but I suspect that the chance the first line in the output
> matches what --shared-index-path reports is 50% if we expect to have two
> sharedindex* files.
>
> On the other hand, if we do not expect multiple sharedindex* files,
> use of "ls" piped to "tail" is simply misleading.
>
> If this test can be written in such a way that there is only one
> such file that match the pattern, it would be the cleanest to
> understand and explain. As there is only a single invocation of
> "update-index --split-index" immediately after a new repository is
> created, I suspect that the expectation to see only one sharedindex*
> file already holds (because its name is unpredictable, we still need
> to catch it with wildcard), and if that is the case, we can just
> lose "-t" and pipe to tail, i.e. "ls .git/sharedindex* >expect".
Indeed. We can expect only one sharedindex file to be present, and we do
not even have to call out to `ls` but can get away with calling `echo`
(which is a builtin in Bash).
Ciao,
Johannes
next prev parent reply other threads:[~2017-02-17 16:55 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-08 12:17 [PATCH] rev-parse --git-path: fix output when running in a subdirectory Johannes Schindelin
2017-02-08 18:47 ` Junio C Hamano
2017-02-09 21:05 ` Johannes Schindelin
2017-02-09 21:50 ` Junio C Hamano
2017-02-10 4:21 ` Jeff King
2017-02-09 9:48 ` Duy Nguyen
2017-02-09 13:46 ` Mike Rappazzo
2017-02-09 21:11 ` Johannes Schindelin
2017-02-09 21:33 ` Junio C Hamano
2017-02-09 22:11 ` Johannes Schindelin
2017-02-09 22:54 ` Junio C Hamano
2017-02-10 3:52 ` Mike Rappazzo
2017-02-10 15:44 ` Johannes Schindelin
2017-02-10 15:33 ` [PATCH v2 0/2] Fix bugs in rev-parse's output when run " Johannes Schindelin
2017-02-10 15:33 ` [PATCH v2 1/2] rev-parse tests: add tests executed from " Johannes Schindelin
2017-02-10 18:50 ` Junio C Hamano
2017-02-17 16:55 ` Johannes Schindelin [this message]
2017-02-10 20:25 ` Junio C Hamano
2017-02-17 16:57 ` Johannes Schindelin
2017-02-10 15:33 ` [PATCH v2 2/2] rev-parse: fix several options when running in " Johannes Schindelin
2017-02-10 18:57 ` Junio C Hamano
2017-02-17 16:53 ` Johannes Schindelin
2017-02-10 18:59 ` [PATCH v2 0/2] Fix bugs in rev-parse's output when run " Junio C Hamano
2017-02-17 16:58 ` [PATCH v3 " Johannes Schindelin
2017-02-17 16:59 ` [PATCH v3 1/2] rev-parse tests: add tests executed from " Johannes Schindelin
2017-02-17 16:59 ` [PATCH v3 2/2] rev-parse: fix several options when running in " Johannes Schindelin
2017-02-17 18:25 ` [PATCH v3 0/2] Fix bugs in rev-parse's output when run " Junio C Hamano
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