git@vger.kernel.org mailing list mirror (one of many)
 help / color / mirror / code / Atom feed
From: "Đoàn Trần Công Danh" <congdanhqx@gmail.com>
To: Junio C Hamano <gitster@pobox.com>
Cc: git@vger.kernel.org, "Eric Sunshine" <sunshine@sunshineco.com>,
	"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
	"Bagas Sanjaya" <bagasdotme@gmail.com>,
	"Phillip Wood" <phillip.wood123@gmail.com>,
	"Felipe Contreras" <felipe.contreras@gmail.com>
Subject: Re: [PATCH v2 3/5] t0041: use test_line_count_cmd to check std{out,err}
Date: Wed, 16 Jun 2021 21:21:54 +0700	[thread overview]
Message-ID: <YMoJAnvigwexX5b5@danh.dev> (raw)
In-Reply-To: <xmqqlf7ase3d.fsf@gitster.g>

On 2021-06-16 12:06:14+0900, Junio C Hamano <gitster@pobox.com> wrote:
> Đoàn Trần Công Danh  <congdanhqx@gmail.com> writes:
> 
> >  test_expect_success 'tag --contains <existent_tag>' '
> > -	git tag --contains "v1.0" >actual 2>actual.err &&
> > -	grep "v1.0" actual &&
> > -	test_line_count = 0 actual.err
> > +	test_line_count_cmd --err = 0 git tag --contains v1.0 >actual &&
> > +	grep "v1.0" actual
> 
> Sorry, but I am not impressed if this is a typical/prime example of
> how the new helper helps in writing our tests.

Yay, reading through the patch again, and I'm become less enthusiastic
with persuading --err. The only useful application of --err is t4068.
----8<---
diff --git a/t/t4068-diff-symmetric-merge-base.sh b/t/t4068-diff-symmetric-merge-base.sh
index 2d650d8f10..33e2327072 100755
--- a/t/t4068-diff-symmetric-merge-base.sh
+++ b/t/t4068-diff-symmetric-merge-base.sh
@@ -61,9 +61,7 @@ test_expect_success 'diff with one merge base' '
 # It should have one of those two, which comes out
 # to seven lines.
 test_expect_success 'diff with two merge bases' '
-	git diff br1...main >tmp 2>err &&
-	test_line_count = 7 tmp &&
-	test_line_count = 1 err
+	test_line_count_cmd --out = 7 --err = 1 git diff br1...main
 '
 
 test_expect_success 'diff with no merge bases' '
----->8----

However, going through all the trouble for a single application is not
really worth it.  I'm going to drop --err, remove --out option, too.
So, its prototype would be:

	test_line_count_cmd <op> <val> [!] cmd [args...]

> Notice that so many tests that you touched only care about 0 lines?
> 
> Instead of this new helper, I think it would be a more useful
> improvement if we check the emptyness in a more direct way, i.e.
> 
> >  test_expect_success 'tag --contains <existent_tag>' '
> > 	git tag --contains "v1.0" >actual 2>actual.err &&
> > 	grep "v1.0" actual &&
> > -	test_line_count = 0 actual.err
> > +	test_must_be_empty actual.err
> 
> I think this helper may be misnamed and test_file_is_empty would sit
> better with test_dir_is_empty and test_file_not_empty that already
> exist, though.

That would be an improvement, but it should be written in a different
series.

> 
> By the way, my opinion would be quite different if example like this
> one ...
> 
> >  test_expect_success 'tag --no-contains <existent_tag>' '
> > -	git tag --no-contains "v1.0" >actual 2>actual.err  &&
> > -	test_line_count = 0 actual &&
> > -	test_line_count = 0 actual.err
> > +	test_line_count_cmd --out = 0 --err = 0 git tag --no-contains v1.0
> >  '
> 
> ... were the majority, but I do not think that is the case.  Most
> tests that employ the new test_line_count_cmd in this patch still
> create either actual or actual.err in the working tree anyway, so I
> do not see much point in adding this new helper---it is hard to
> explain to new test writers when to use it.

I'm not sure if I get your opinion.  Did you mean you wouldn't take
whole helper? Or you meant you still wanted to see a new helper for
checking only stdout?  If it's the former, I'll send a different
series to only clean "git ls-files ... | wc -l" in t6400 and t6402,
if it's the latter, I'll rewrite without --err.

-- 
Danh

  reply	other threads:[~2021-06-16 14:22 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-15 17:20 [PATCH v2 0/5] t: new helper test_line_count_cmd Đoàn Trần Công Danh
2021-06-15 17:20 ` [PATCH v2 1/5] test-lib-functions: introduce test_line_count_cmd Đoàn Trần Công Danh
2021-06-17  4:51   ` Felipe Contreras
2021-06-15 17:20 ` [PATCH v2 2/5] t6402: use find(1) builtin to filter instead of grep Đoàn Trần Công Danh
2021-06-15 17:20 ` [PATCH v2 3/5] t0041: use test_line_count_cmd to check std{out,err} Đoàn Trần Công Danh
2021-06-16  3:06   ` Junio C Hamano
2021-06-16 14:21     ` Đoàn Trần Công Danh [this message]
2021-06-17  0:18       ` Junio C Hamano
2021-06-15 17:20 ` [PATCH v2 4/5] t6400: use test_line_count_cmd to count # of lines in stdout Đoàn Trần Công Danh
2021-06-15 17:20 ` [PATCH v2 5/5] t6402: " Đoàn Trần Công Danh
2021-06-19  1:30 ` [PATCH v3 0/4] t: new helper test_line_count_cmd Đoàn Trần Công Danh
2021-06-19  5:50   ` Eric Sunshine
2021-06-19  6:17     ` Junio C Hamano
2021-06-19  6:26       ` Eric Sunshine
2021-06-19  6:50         ` Junio C Hamano
2021-06-21 23:52           ` Đoàn Trần Công Danh
2021-06-22  0:43             ` Eric Sunshine
2021-06-19  1:30 ` [PATCH v3 1/4] test-lib-functions: introduce test_line_count_cmd Đoàn Trần Công Danh
2021-06-21  9:08   ` Andrei Rybak
2021-06-24 19:23     ` Andrei Rybak
2021-06-19  1:30 ` [PATCH v3 2/4] t6402: use find(1) builtin to filter instead of grep Đoàn Trần Công Danh
2021-06-21  8:17   ` Andrei Rybak
2021-06-21 23:54     ` Đoàn Trần Công Danh
2021-06-19  1:30 ` [PATCH v3 3/4] t6400: use test_line_count_cmd to count # of lines in stdout Đoàn Trần Công Danh
2021-06-19  1:30 ` [PATCH v3 4/4] t6402: " Đoàn Trần Công Danh
2021-06-29 13:57 ` [PATCH v4 0/2] t640{0,2}: preserve ls-files exit status code Đoàn Trần Công Danh
2021-06-29 13:57   ` [PATCH v4 1/2] t6400: preserve git " Đoàn Trần Công Danh
2021-06-29 14:11     ` Eric Sunshine
2021-06-29 22:49       ` Junio C Hamano
2021-06-30  1:57         ` Eric Sunshine
2021-06-30  3:36           ` Junio C Hamano
2021-06-30 11:01             ` Đoàn Trần Công Danh
2021-06-30 20:44               ` Junio C Hamano
2021-06-29 13:57   ` [PATCH v4 2/2] t6402: preserve git " Đoàn Trần Công Danh
2021-06-29 20:49   ` [PATCH v4 0/2] t640{0,2}: preserve ls-files " Junio C Hamano
2021-07-04  5:46 ` [PATCH v5 0/3] new test-libs-function: test_stdout_line_count Đoàn Trần Công Danh
2021-07-04  5:46   ` [PATCH v5 1/3] test-lib-functions: introduce test_stdout_line_count Đoàn Trần Công Danh
2021-07-04  5:56     ` Eric Sunshine
2021-07-06 19:24       ` Junio C Hamano
2021-07-07  3:03         ` Đoàn Trần Công Danh
2021-07-04  5:46   ` [PATCH v5 2/3] t6400: preserve git ls-files exit status code Đoàn Trần Công Danh
2021-07-04  5:46   ` [PATCH v5 3/3] t6402: preserve git " Đoàn Trần Công Danh

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=YMoJAnvigwexX5b5@danh.dev \
    --to=congdanhqx@gmail.com \
    --cc=avarab@gmail.com \
    --cc=bagasdotme@gmail.com \
    --cc=felipe.contreras@gmail.com \
    --cc=git@vger.kernel.org \
    --cc=gitster@pobox.com \
    --cc=phillip.wood123@gmail.com \
    --cc=sunshine@sunshineco.com \
    /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
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this public 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).