From: Junio C Hamano <gitster@pobox.com>
To: Jeff King <peff@peff.net>
Cc: "brian m. carlson" <sandals@crustytoothpaste.net>, git@vger.kernel.org
Subject: Re: [PATCH v2 07/24] t6300: abstract away SHA-1-specific constants
Date: Mon, 24 Feb 2020 12:41:50 -0800 [thread overview]
Message-ID: <xmqqd0a3pvjl.fsf@gitster-ct.c.googlers.com> (raw)
In-Reply-To: <20200224181204.GA2130083@coredump.intra.peff.net> (Jeff King's message of "Mon, 24 Feb 2020 13:12:04 -0500")
Jeff King <peff@peff.net> writes:
> On Mon, Feb 24, 2020 at 10:01:08AM -0800, Junio C Hamano wrote:
>
>> > -test_atom head objectsize 171
>> > -test_atom head objectsize:disk 138
>> > -test_atom head deltabase 0000000000000000000000000000000000000000
>> > +test_atom head objectsize $((131 + hexlen))
>>
>> 171 == 131 + 40 and that is because we are looking at the initial
>> commit, whose contents has a single object name (i.e. its tree).
>
> I wonder if it would be more readable to just pipe "cat-file" through
> "wc -c", rather than hard-coding. Then there's no magic number at all.
After seeing nearby tests use output from $(git rev-parse) as the
expected output, I had a similar thought.
>> > +test_atom head objectsize:disk $disklen
>
> Likewise for $disklen, if it's a loose object we could just get the
> information from the filesystem. That would stop us caring about the
> hash, _and_ it would make us robust to random changes in the zlib
> compression.
>
> I'm not sure if we also check packed objects. If so, you can compute the
> size from the output of show-index, which gives the offsets of each
> object. That's also how Git does it internally, though, so I'm not sure
> if that is getting too close to just testing nothing (but IMHO the thing
> we're really covering here is the format routines).
Somebody may find it tempting to use "cat-file --batch-check=<format>"
and at that point it would really become fuzzy what we are checking ;-)
next prev parent reply other threads:[~2020-02-24 20:41 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-22 20:17 [PATCH v2 00/24] SHA-256 stage 4 implementation, part 1/3 brian m. carlson
2020-02-22 20:17 ` [PATCH v2 01/24] builtin/pack-objects: make hash agnostic brian m. carlson
2020-02-23 21:57 ` Jeff King
2020-02-24 3:01 ` Jeff King
2020-02-24 3:42 ` brian m. carlson
2020-02-24 4:20 ` Jeff King
2020-02-22 20:17 ` [PATCH v2 02/24] hash: implement and use a context cloning function brian m. carlson
2020-02-22 20:17 ` [PATCH v2 03/24] hex: introduce parsing variants taking hash algorithms brian m. carlson
2020-02-22 20:17 ` [PATCH v2 04/24] hex: add functions to parse hex object IDs in any algorithm brian m. carlson
2020-02-22 20:17 ` [PATCH v2 05/24] repository: require a build flag to use SHA-256 brian m. carlson
2020-02-22 20:17 ` [PATCH v2 06/24] t: use hash-specific lookup tables to define test constants brian m. carlson
2020-02-22 20:17 ` [PATCH v2 07/24] t6300: abstract away SHA-1-specific constants brian m. carlson
2020-02-24 18:01 ` Junio C Hamano
2020-02-24 18:12 ` Jeff King
2020-02-24 20:41 ` Junio C Hamano [this message]
2020-02-22 20:17 ` [PATCH v2 08/24] t6300: make hash algorithm independent brian m. carlson
2020-02-22 20:17 ` [PATCH v2 09/24] t/helper/test-dump-split-index: initialize git repository brian m. carlson
2020-02-22 20:17 ` [PATCH v2 10/24] t/helper: initialize repository if necessary brian m. carlson
2020-02-24 18:05 ` Junio C Hamano
2020-02-25 0:05 ` brian m. carlson
2020-02-22 20:17 ` [PATCH v2 11/24] t/helper: make repository tests hash independent brian m. carlson
2020-02-22 20:17 ` [PATCH v2 12/24] setup: allow check_repository_format to read repository format brian m. carlson
2020-02-22 20:17 ` [PATCH v2 13/24] builtin/init-db: allow specifying hash algorithm on command line brian m. carlson
2020-02-24 18:14 ` Junio C Hamano
2020-02-25 0:11 ` brian m. carlson
2020-02-22 20:17 ` [PATCH v2 14/24] builtin/init-db: add environment variable for new repo hash brian m. carlson
2020-02-22 20:17 ` [PATCH v2 15/24] init-db: move writing repo version into a function brian m. carlson
2020-02-22 20:17 ` [PATCH v2 16/24] worktree: allow repository version 1 brian m. carlson
2020-02-22 20:17 ` [PATCH v2 17/24] commit: use expected signature header for SHA-256 brian m. carlson
2020-02-24 18:24 ` Junio C Hamano
2020-02-22 20:17 ` [PATCH v2 18/24] gpg-interface: improve interface for parsing tags brian m. carlson
2020-02-24 18:26 ` Junio C Hamano
2020-02-25 10:29 ` Johannes Schindelin
2020-02-25 19:25 ` Junio C Hamano
2020-02-26 3:05 ` brian m. carlson
2020-02-26 3:11 ` Junio C Hamano
2020-02-26 2:23 ` brian m. carlson
2020-02-27 13:24 ` Johannes Schindelin
2020-02-27 15:06 ` Junio C Hamano
2020-02-22 20:17 ` [PATCH v2 19/24] tag: store SHA-256 signatures in a header brian m. carlson
2020-02-24 18:30 ` Junio C Hamano
2020-02-22 20:17 ` [PATCH v2 20/24] fast-import: permit reading multiple marks files brian m. carlson
2020-06-05 16:14 ` Junio C Hamano
2020-06-05 16:26 ` Junio C Hamano
2020-06-05 22:39 ` brian m. carlson
2020-06-05 22:53 ` Junio C Hamano
2020-02-22 20:17 ` [PATCH v2 21/24] fast-import: add helper function for inserting mark object entries brian m. carlson
2020-02-22 20:17 ` [PATCH v2 22/24] fast-import: make find_marks work on any mark set brian m. carlson
2020-02-22 20:17 ` [PATCH v2 23/24] fast-import: add a generic function to iterate over marks brian m. carlson
2020-02-22 20:17 ` [PATCH v2 24/24] fast-import: add options for rewriting submodules brian m. carlson
2020-02-24 18:34 ` [PATCH v2 00/24] SHA-256 stage 4 implementation, part 1/3 Junio C Hamano
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