git@vger.kernel.org list mirror (unofficial, one of many)
 help / color / mirror / code / Atom feed
From: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
To: Taylor Blau <me@ttaylorr.com>
Cc: git@vger.kernel.org, Junio C Hamano <gitster@pobox.com>,
	Jonathan Nieder <jrnieder@gmail.com>,
	Jiang Xin <zhiyou.jx@alibaba-inc.com>
Subject: Re: [PATCH 2/2] bundle tests: use test_cmp instead of grep
Date: Thu, 22 Jul 2021 01:53:54 +0200	[thread overview]
Message-ID: <87fsw7ussi.fsf@evledraar.gmail.com> (raw)
In-Reply-To: <YPcE24InpY4evFyE@nand.local>


On Tue, Jul 20 2021, Taylor Blau wrote:

> On Tue, Jul 20, 2021 at 01:52:09PM +0200, Ævar Arnfjörð Bjarmason wrote:
>> So let's use test_cmp instead, and also in the other nearby tests
>> where it's easy.
>
> I took a look at this patch carefully to make sure that this
> transformation also improved the readability, too.
>
> Looking around, I think that this was a good improvement in readability,
> but also hardened the tests (for the reasons that you mentioned). One
> tiny note below.
>
>>  test_expect_success 'empty bundle file is rejected' '
>> @@ -67,11 +83,33 @@ test_expect_success 'ridiculously long subject in boundary' '
>>  	printf "%01200d\n" 0 | git commit -F - &&
>>  	test_commit fifth &&
>>  	git bundle create long-subject-bundle.bdl HEAD^..HEAD &&
>> -	git bundle list-heads long-subject-bundle.bdl >heads &&
>> -	test -s heads &&
>> +	cat >expect <<-EOF &&
>> +	$(git rev-parse main) HEAD
>> +	EOF
>> +	git bundle list-heads long-subject-bundle.bdl >actual &&
>> +	test_cmp expect actual &&
>
> This is quite readable, but the assertion below gets much more
> complicated as a result of the change.
>
>>  	git fetch long-subject-bundle.bdl &&
>> -	sed -n "/^-/{p;q;}" long-subject-bundle.bdl >boundary &&
>> -	grep "^-$OID_REGEX " boundary
>> +
>> +	cat >expect.common <<-EOF &&
>> +	-$(git log --pretty=format:"%H %s" -1 HEAD^)
>> +	$(git rev-parse HEAD) HEAD
>> +	EOF
>> +	if test_have_prereq SHA1
>> +	then
>> +		cp expect.common expect
>> +	else
>> +		echo @object-format=sha256 >expect
>> +		cat expect.common >>expect
>> +	fi &&
>
> Here we're setting up expect, but I think flipping the order might make
> things a little easier to follow. Maybe something like this:
>
>     rm expect &&
>     if ! test_have_prereq SHA1
>     then
>       echo "@object-format=sha256" >expect
>     fi &&
>     cat >>expect <<-EOF &&
>     -$(git log --pretty=format:"%H %s" -1 HEAD^)
>     $(git rev-parse HEAD) HEAD
>     EOF &&

Thanks, I used pretty much that as-is for v2.

> Or, if you wanted to go further, you could do something like:
>
>     cat >expect <<-EOF
>     $(test_have_prereq SHA1 || echo "@object-format=sha256")
>     -$(git log --pretty=format:"%H %s" -1 HEAD^)
>     $(git rev-parse HEAD) HEAD
>     EOF
>
> which is arguably a little tighter (although I find the
> echo-in-a-heredoc thing to be kind of ugly).

This one won't work because you'll have an empty line at the start under
SHA-1.

>> +	if test_have_prereq SHA1
>> +	then
>> +		head -n 3 long-subject-bundle.bdl >bundle-header
>> +	else
>> +		head -n 4 long-subject-bundle.bdl >bundle-header
>> +	fi &&
>> +	grep -v "^#" bundle-header >actual &&
>
> Here I would suggest getting rid of the bundle-header intermediary and
> instead writing:
>
>     if test_have_prereq SHA1
>     then
>       head -n 3 long-subject-bundle.bdl
>     else
>       head -n 4 long-subject-bundle.bdl
>     fi | grep -v "^#" >actual
>
> and then having your

Thanks, used that.

  reply	other threads:[~2021-07-21 23:54 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-20 11:52 [PATCH 0/2] bundle tests: modernize, fix missing coverage & test_cmp Ævar Arnfjörð Bjarmason
2021-07-20 11:52 ` [PATCH 1/2] bundle tests: use ">file" not ": >file" Ævar Arnfjörð Bjarmason
2021-07-20 19:57   ` Junio C Hamano
2021-07-20 20:57   ` Felipe Contreras
2021-07-20 11:52 ` [PATCH 2/2] bundle tests: use test_cmp instead of grep Ævar Arnfjörð Bjarmason
2021-07-20 17:16   ` Taylor Blau
2021-07-21 23:53     ` Ævar Arnfjörð Bjarmason [this message]
2021-07-22 18:13       ` Taylor Blau
2021-07-20 17:18 ` [PATCH 0/2] bundle tests: modernize, fix missing coverage & test_cmp Taylor Blau
2021-07-21 23:53 ` [PATCH v2 " Ævar Arnfjörð Bjarmason
2021-07-21 23:53   ` [PATCH v2 1/2] bundle tests: use ">file" not ": >file" Ævar Arnfjörð Bjarmason
2021-07-21 23:53   ` [PATCH v2 2/2] bundle tests: use test_cmp instead of grep Ævar Arnfjörð Bjarmason
2021-07-22 18:17     ` Taylor Blau
2021-07-22 18:17   ` [PATCH v2 0/2] bundle tests: modernize, fix missing coverage & test_cmp Taylor Blau

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: http://vger.kernel.org/majordomo-info.html

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=87fsw7ussi.fsf@evledraar.gmail.com \
    --to=avarab@gmail.com \
    --cc=git@vger.kernel.org \
    --cc=gitster@pobox.com \
    --cc=jrnieder@gmail.com \
    --cc=me@ttaylorr.com \
    --cc=zhiyou.jx@alibaba-inc.com \
    --subject='Re: [PATCH 2/2] bundle tests: use test_cmp instead of grep' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Code repositories for project(s) associated with this inbox:

	https://80x24.org/mirrors/git.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).