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From: "brian m. carlson" <sandals@crustytoothpaste.net>
To: Jonathan Tan <jonathantanmy@google.com>
Cc: git@vger.kernel.org
Subject: Re: [PATCH] t5616: make robust to delta base change
Date: Mon, 13 Jan 2020 23:11:41 +0000
Message-ID: <20200113231141.GR6570@camp.crustytoothpaste.net> (raw)
In-Reply-To: <20200113202823.228062-1-jonathantanmy@google.com>

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On 2020-01-13 at 20:28:23, Jonathan Tan wrote:
> Commit 6462d5eb9a ("fetch: remove fetch_if_missing=0", 2019-11-08)
> contains a test that relies on having to lazily fetch the delta base of
> a blob, but assumes that the tree being fetched (as part of the test) is
> sent as a non-delta object. This assumption may not hold in the future;
> for example, a change in the length of the object hash might result in
> the tree being sent as a delta instead.
> 
> Make the test more robust by relying on having to lazily fetch the delta
> base of the tree instead, and by making no assumptions on whether the
> blobs are sent as delta or non-delta.
> 
> Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
> ---
> Thanks, brian, for bringing this to my attention. I think that the
> change in the length of the object hash made the tree a delta and thus
> require a lazy-fetch of its delta base. Can you see if this patch
> eliminates the need for your t5616 patch?
> 
> In any case, this change passes at master and I think should go in
> independent of brian's changes - if the delta base algorithm changes for
> whatever reason, this is still needed to make the test more robust.

Yup, this does indeed fix the problem.  Reverting my patch and applying
this one makes the test pass, so I'll drop my patch in the reroll.

Thanks for the quick fix.
-- 
brian m. carlson: Houston, Texas, US
OpenPGP: https://keybase.io/bk2204

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  reply index

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-13 12:38 [PATCH 00/24] SHA-256 test fixes, part 8 brian m. carlson
2020-01-13 12:38 ` [PATCH 01/24] t/lib-pack: support SHA-256 brian m. carlson
2020-01-13 12:38 ` [PATCH 02/24] t3206: make hash size independent brian m. carlson
2020-01-13 12:38 ` [PATCH 03/24] t3305: annotate with SHA1 prerequisite brian m. carlson
2020-01-13 12:38 ` [PATCH 04/24] t3308: make test work with SHA-256 brian m. carlson
2020-01-13 12:38 ` [PATCH 05/24] t3309: " brian m. carlson
2020-01-13 12:38 ` [PATCH 06/24] t3310: " brian m. carlson
2020-01-13 12:38 ` [PATCH 07/24] t3311: " brian m. carlson
2020-01-13 12:38 ` [PATCH 08/24] t3404: remove SHA1 prerequisite brian m. carlson
2020-01-13 12:38 ` [PATCH 09/24] t4013: make test hash independent brian m. carlson
2020-01-13 12:38 ` [PATCH 10/24] t4060: make test work with SHA-256 brian m. carlson
2020-01-13 12:38 ` [PATCH 11/24] t4211: make test hash independent brian m. carlson
2020-01-13 12:38 ` [PATCH 12/24] t5302: make hash size independent brian m. carlson
2020-01-13 12:38 ` [PATCH 13/24] t5309: make test hash independent brian m. carlson
2020-01-13 12:38 ` [PATCH 14/24] t5313: " brian m. carlson
2020-01-13 12:38 ` [PATCH 15/24] t5321: " brian m. carlson
2020-01-13 12:38 ` [PATCH 16/24] t5515: " brian m. carlson
2020-01-13 12:38 ` [PATCH 17/24] t5318: update for SHA-256 brian m. carlson
2020-01-13 13:50   ` Eric Sunshine
2020-01-13 23:14     ` brian m. carlson
2020-01-13 12:38 ` [PATCH 18/24] t5616: use correct filter syntax brian m. carlson
2020-01-13 20:28   ` [PATCH] t5616: make robust to delta base change Jonathan Tan
2020-01-13 23:11     ` brian m. carlson [this message]
2020-01-25 22:43     ` brian m. carlson
2020-01-13 12:38 ` [PATCH 19/24] t5607: make hash size independent brian m. carlson
2020-01-13 12:38 ` [PATCH 20/24] t5703: make test work with SHA-256 brian m. carlson
2020-01-13 13:53   ` Eric Sunshine
2020-01-13 23:15     ` brian m. carlson
2020-01-13 12:38 ` [PATCH 21/24] t5703: switch tests to use test_oid brian m. carlson
2020-01-13 12:38 ` [PATCH 22/24] t6000: abstract away SHA-1-specific constants brian m. carlson
2020-01-13 12:38 ` [PATCH 23/24] t6006: make hash size independent brian m. carlson
2020-01-13 12:38 ` [PATCH 24/24] t6024: update for SHA-256 brian m. carlson
2020-01-13 13:41 ` [PATCH 00/24] SHA-256 test fixes, part 8 Eric Sunshine
2020-01-13 23:17   ` brian m. carlson
2020-01-13 23:34     ` Eric Sunshine
2020-01-16  0:28 ` Johannes Schindelin

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