From: Jeff King <peff@peff.net>
To: "SZEDER Gábor" <szeder.dev@gmail.com>
Cc: "Christian Couder" <christian.couder@gmail.com>,
git@vger.kernel.org, "Junio C Hamano" <gitster@pobox.com>,
"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
"Jonathan Tan" <jonathantanmy@google.com>,
"Brandon Williams" <bmwill@google.com>,
"Christian Couder" <chriscool@tuxfamily.org>
Subject: Re: [PATCH 2/3] t: add t0016-oidmap.sh
Date: Thu, 13 Jun 2019 15:02:30 -0400 [thread overview]
Message-ID: <20190613190229.GB27217@sigill.intra.peff.net> (raw)
In-Reply-To: <20190613175236.GF31952@szeder.dev>
On Thu, Jun 13, 2019 at 07:52:36PM +0200, SZEDER Gábor wrote:
> > At the point where we are normalizing byte order of the hashes, I have
> > to wonder: why do we care about testing the hash value in the first
> > place? We care that oidmap can store and retrieve values, and that it
> > performs well. But as long as it does those things, I don't think
> > anybody cares if it uses the first 4 bytes of the sha1 or the last 4.
> >
> > I know there are testing philosophies that go to this level of
> > white-box testing, but I don't think we usually do in Git. A unit
> > test of oidmap's externally visible behavior seems like the right
> > level to me.
>
> That's a good point... but then why does 't0011-hashmap.sh' do it in
> the first place? As far as I understood this t0016 mainly follows
> suit of t0011.
I'd make the same argument against t0011. :)
I think there it at least made a little more sense because we truly are
hashing ourselves, rather than just copying out some sha1 bytes. But I
think I'd still argue that if I updated strhash() to use a different
hash, I should not have to be updating t0011 to change out the hashes.
-Peff
next prev parent reply other threads:[~2019-06-13 19:02 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-09 4:49 [PATCH 0/3] Test oidmap Christian Couder
2019-06-09 4:49 ` [PATCH 1/3] t/helper: add test-oidmap.c Christian Couder
2019-06-09 4:49 ` [PATCH 2/3] t: add t0016-oidmap.sh Christian Couder
2019-06-09 9:22 ` SZEDER Gábor
2019-06-09 20:24 ` Christian Couder
2019-06-09 21:21 ` SZEDER Gábor
2019-06-09 21:51 ` Christian Couder
2019-06-10 16:46 ` Junio C Hamano
2019-06-13 17:19 ` Jeff King
2019-06-13 17:52 ` SZEDER Gábor
2019-06-13 19:02 ` Jeff King [this message]
2019-06-13 22:22 ` Junio C Hamano
2019-06-14 10:36 ` Christian Couder
2019-06-09 4:49 ` [PATCH 3/3] oidmap: use sha1hash() instead of static hash() function Christian Couder
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