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From: Junio C Hamano <gitster@pobox.com>
To: Jonathan Nieder <jrnieder@gmail.com>
Cc: "Johannes Schindelin" <Johannes.Schindelin@gmx.de>,
	"Stefan Beller" <sbeller@google.com>,
	"Phillip Wood" <phillip.wood@dunelm.org.uk>,
	"git@vger.kernel.org" <git@vger.kernel.org>,
	"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Subject: Re: pushing for a new hash, was Re: [PATCH 2/3] rebase: Add tests for console output
Date: Sat, 03 Jun 2017 09:36:02 +0900	[thread overview]
Message-ID: <xmqqr2z1x5zh.fsf@gitster.mtv.corp.google.com> (raw)
In-Reply-To: <20170602175455.GA30988@aiede.mtv.corp.google.com> (Jonathan Nieder's message of "Fri, 2 Jun 2017 10:54:55 -0700")

Jonathan Nieder <jrnieder@gmail.com> writes:

> 2. Hard-coded object ids in tests: As Stefan hinted, many tests beyond
>    t00* make assumptions about the exact values of object ids.  That's
>    bad for maintainability for other reasons beyond the hash function
>    transition, too.
>
>    It should be possible to suss them out by patching git's sha1
>    routine to use the ones-complement of sha1 (~sha1) instead and
>    seeing which tests fail.

One particularly nasty one is t1512-rev-parse-disambiguation that
ensures that the abbreviation and disambiguation works correctly.
It uses a set of objects (tags, commits, trees and blobs) whose
object names all begin with number of "0"; which will of course
become useless once we change the hash function.

No matter what new hash function is chosen, we'd need a similar
test to ensure that disambiguation works correctly, so one of the
tasks for hash migration is to port (not drop) this test.

  parent reply	other threads:[~2017-06-03  0:36 UTC|newest]

Thread overview: 59+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-05-31 10:42 [PATCH 0/3] Add regression tests for recent rebase -i fixes Phillip Wood
2017-05-31 10:42 ` [PATCH 1/3] rebase -i: Add test for reflog message Phillip Wood
2017-06-01  2:00   ` Junio C Hamano
2017-05-31 10:42 ` [PATCH 2/3] rebase: Add tests for console output Phillip Wood
2017-05-31 19:02   ` Phillip Wood
2017-06-01  1:59     ` Junio C Hamano
2017-06-01 12:56   ` Johannes Schindelin
2017-06-01 23:40     ` Junio C Hamano
2017-06-01 23:47       ` Stefan Beller
2017-06-02 12:47         ` pushing for a new hash, was " Johannes Schindelin
2017-06-02 17:54           ` Jonathan Nieder
2017-06-02 18:05             ` Jonathan Nieder
2017-06-02 20:29             ` Ævar Arnfjörð Bjarmason
2017-06-15 10:38               ` Johannes Schindelin
2017-06-03  0:36             ` Junio C Hamano [this message]
2017-06-06 22:22             ` Johannes Schindelin
2017-06-06 22:45               ` Jonathan Nieder
2017-06-07  1:09                 ` Junio C Hamano
2017-06-07  2:18                   ` [PATCH] t4005: modernize style and drop hard coded sha1 Stefan Beller
2017-06-07 17:39                     ` Brandon Williams
2017-06-06 22:45               ` pushing for a new hash, was Re: [PATCH 2/3] rebase: Add tests for console output Stefan Beller
2017-06-06 22:52                 ` Jonathan Nieder
2017-06-07  0:34                 ` Samuel Lijin
2017-06-07 14:47                 ` Johannes Schindelin
2017-06-07 16:53                   ` Stefan Beller
2017-06-07 10:47     ` Phillip Wood
2017-06-09 16:39       ` Junio C Hamano
2017-06-14 10:18         ` Phillip Wood
2017-06-14 12:51       ` Johannes Schindelin
2017-05-31 10:42 ` [PATCH 3/3] rebase: Add tests for console output with conflicting stash Phillip Wood
2017-06-14 10:24 ` [PATCH v2 0/3] Add regression tests for rectent rebase -i fixes Phillip Wood
2017-06-14 10:24   ` [PATCH v2 1/3] rebase -i: Add test for reflog message Phillip Wood
2017-06-14 10:24   ` [PATCH v2 2/3] rebase: Add regression tests for console output Phillip Wood
2017-06-14 10:24   ` [PATCH v2 3/3] rebase: Add more " Phillip Wood
2017-06-14 20:35   ` [PATCH v2 0/3] Add regression tests for rectent rebase -i fixes Johannes Schindelin
2017-06-15 23:05   ` Junio C Hamano
2017-06-15 23:23     ` Junio C Hamano
2017-06-15 23:29       ` Junio C Hamano
2017-06-16 13:49         ` Johannes Schindelin
2017-06-16 18:43           ` Johannes Sixt
2017-06-16 21:05             ` Junio C Hamano
2017-06-19 19:45             ` Johannes Sixt
2017-06-19 20:02               ` Junio C Hamano
2017-06-19  9:49           ` Phillip Wood
2017-06-19 15:45             ` Junio C Hamano
2017-06-19  9:52         ` Phillip Wood
2017-06-19 17:56 ` [PATCH v3 0/4] Add regression tests for recent " Phillip Wood
2017-06-19 17:56   ` [PATCH v3 1/4] sequencer: print autostash messages to stderr Phillip Wood
2017-06-19 17:56   ` [PATCH v3 2/4] rebase -i: Add test for reflog message Phillip Wood
2017-06-19 17:56   ` [PATCH v3 3/4] rebase: Add regression tests for console output Phillip Wood
2017-06-19 17:56   ` [PATCH v3 4/4] rebase: Add more " Phillip Wood
2017-06-23  4:17   ` [PATCH v3 0/4] Add regression tests for recent rebase -i fixes Junio C Hamano
2017-06-23  5:07     ` Junio C Hamano
2017-06-23  9:53       ` Phillip Wood
2017-06-23 17:03         ` Junio C Hamano
2017-06-23 18:53           ` Junio C Hamano
2017-06-26  9:17             ` Phillip Wood
2017-06-23 19:01           ` Junio C Hamano
2017-06-26  9:23             ` Phillip Wood

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