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From: Jiang Xin <worldhello.net@gmail.com>
To: Junio C Hamano <gitster@pobox.com>
Cc: "Git List" <git@vger.kernel.org>,
	"SZEDER Gábor" <szeder.dev@gmail.com>,
	"Sun Chao" <sunchao9@huawei.com>,
	"Jiang Xin" <zhiyou.jx@alibaba-inc.com>
Subject: Re: [PATCH v7 1/6] t5323: test cases for git-pack-redundant
Date: Fri, 1 Feb 2019 13:44:16 +0800
Message-ID: <CANYiYbG5vbV1bqbHu-u19XFy7JTpcopg0s=JWAhJBRNGvP7j3g@mail.gmail.com> (raw)
In-Reply-To: <xmqq7eek1ozm.fsf@gitster-ct.c.googlers.com>

Junio C Hamano <gitster@pobox.com> 于2019年2月1日周五 上午5:44写道:
> > +create_commits () {
> > +     parent=
> > +     for name in A B C D E F G H I J K L M N O P Q R
> > +     do
> > +             test_tick &&
> > +             T=$(git write-tree) &&
>
> Move this outside loop, not for efficiency but for clarity. This
> helper function creates a single empty tree and bunch of commits
> that hold the same empty tree, arranged as a single strand of
> pearls.

Will rewrite as:

    create_commits () {
            parent=
            T=$(git write-tree) &&
            for name in A B C D E F G H I J K L M N O P Q R

>
> By the way, I had to draw a table like this to figure out ...
>
>      T A B C D E F G H I J K L M N O P Q R
> 1    x x x x x x x                       x
> 2        x x x x   x x x
> 3                x     x x x x x
> 4                        x x x x     x
> 5                  x x           x x
> 6                                x x   x
> 7                                    x x
> 8      x
>
> ... what is going on.  Perhaps something like this would help other
> readers near the top of the file (or in test_description)?

Nice chart, will edit test_description as follows:

    test_description='git pack-redundant test

    In order to test git-pack-redundant, we will create a number of
redundant
    packs in the repository `master.git`. The relationship between
packs (P1-P8)
    and objects (T,A-R) is show in the following chart:

           | T A B C D E F G H I J K L M N O P Q R
        ---+--------------------------------------
        P1 | x x x x x x x                       x
        P2 |     x x x x   x x x
        P3 |             x     x x x x x
        P4 |                     x x x x     x
        P5 |               x x           x x
        P6 |                             x x   x
        P7 |                                 x x
        P8 |   x

    Another repoisitory `shared.git` has unique objects (X-Z), while
share others
    objects through alt-odb (of `master.git`).  The relationship
between packs
    and objects is as follows:

           | T A B C D E F G H I J K L M N O P Q R   X Y Z
        ---+----------------------------------------------
        Px1|   x x x                                 x x x
        Px2|         x x x                           x x x
    '

>
>
> > +format_packfiles () {
> > +     sed \
> > +             -e "s#.*/pack-\(.*\)\.idx#\1#" \
> > +             -e "s#.*/pack-\(.*\)\.pack#\1#" |
> > +     sort -u |
> > +     while read p
> > +     do
> > +             if test -z "$(eval echo \${P$p})"
> > +             then
> > +                     echo $p
>
> All the "expected output" below will expect P$n:${P$n} prepared by
> various create_pack_$n helpers we saw earlier, so an unknown
> packfile would be detected as a line that this emits.  Is that the
> idea?

Right.  During the reroll, a typo makes an empty output, so I decide
to make this change.


> > +             else
> > +                     eval echo "\${P$p}"
> > +             fi
> > +     done |
> > +     sort
> > +}
> > +
> > +test_expect_success 'setup master.git' '
> > +     git init --bare master.git &&
> > +     cd master.git &&
> > +     create_commits
> > +'
>
> Everything below will be done inside master.git?  Avoid cd'ing
> around in random places in the test script, as a failure in any of
> the steps that does cd would start later tests in an unexpected
> place, if you can.

The first 10 test cases will run inside master.git, and others will
run inside shared.git.  Only run cd inside the two `setup` test cases.

> > +cat >expected <<EOF
> > +P2:$P2
> > +EOF
> > +
> > +test_expect_success 'one of pack-2/pack-3 is redundant' '
> > +     git pack-redundant --all >out &&
> > +     format_packfiles <out >actual &&
> > +     test_cmp expected actual
> > +'
>
> Do the preparation of file "expect" (most of the tests compare
> 'expect' vs 'actual', not 'expected') _inside_ the next test that
> uses it.  i.e.
>
>         test_expect_success 'with 1 4 and 5, either 2 or 3 can be omitted' '
>                 cat >expect <<-EOF &&
>                 P2:$P2
>                 EOF
>                 git pack-redundant --all >out &&
>                 format ... >actual &&
>                 test_cmp expect actual
>         '

Will do.

> > +test_expect_success 'setup shared.git' '
> > +     cd "$TRASH_DIRECTORY" &&
> > +     git clone -q --mirror master.git shared.git &&
>
> Why "-q"?

To make verbose output cleaner.

> > +     cd shared.git &&
> > +     printf "../../master.git/objects" >objects/info/alternates
> > +'
>
> Why not echo?  I recall designing the alternates file to be a plain
> text file.  Is it necessary to leave the line incomplete?

Forgot "\n", will append.

>
> > +test_expect_success 'remove redundant packs by alt-odb, no packs left' '
> > +     git pack-redundant --all --alt-odb | xargs rm &&
> > +     git fsck --no-progress &&
>
> Why "--no-progress"?

To make verbose output cleaner.

>
> > +     test_must_fail git pack-redundant --all --alt-odb >actual 2>&1 &&
> > +     test_cmp expected actual
> > +'
> > +
> > +create_commits_others () {
> > +     parent=$(git rev-parse HEAD)

Will append "&&".

  reply index

Thread overview: 83+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-18  9:58 [PATCH 1/2] pack-redundant: new algorithm to find min packs Jiang Xin
2018-12-18  9:58 ` [PATCH 2/2] pack-redundant: remove unused functions Jiang Xin
2018-12-19 12:14   ` [PATCH v2 0/3] pack-redundant: new algorithm to find min packs Jiang Xin
2019-01-02  4:34     ` [PATCH v3 " Jiang Xin
2019-01-02  4:34     ` [PATCH v3 1/3] t5323: test cases for git-pack-redundant Jiang Xin
2019-01-09 12:56       ` SZEDER Gábor
2019-01-09 16:47         ` SZEDER Gábor
2019-01-10 12:01           ` [PATCH v5 0/5] pack-redundant: new algorithm to find min packs Jiang Xin
2019-01-12  9:17             ` [PATCH v6 " Jiang Xin
2019-01-30 11:47               ` [PATCH v7 0/6] " Jiang Xin
2019-02-01 16:21                 ` [PATCH v9 " Jiang Xin
2019-02-01 16:21                 ` [PATCH v9 1/6] t5323: test cases for git-pack-redundant Jiang Xin
2019-02-01 19:42                   ` Eric Sunshine
2019-02-01 21:03                     ` Junio C Hamano
2019-02-01 21:49                       ` Eric Sunshine
2019-02-02 13:30                         ` [PATCH v10 0/6] pack-redundant: new algorithm to find min packs Jiang Xin
2019-02-02 13:30                         ` [PATCH v10 1/6] t5323: test cases for git-pack-redundant Jiang Xin
2019-02-02 13:30                         ` [PATCH v10 2/6] pack-redundant: delay creation of unique_objects Jiang Xin
2019-02-02 13:30                         ` [PATCH v10 3/6] pack-redundant: delete redundant code Jiang Xin
2019-02-02 13:30                         ` [PATCH v10 4/6] pack-redundant: new algorithm to find min packs Jiang Xin
2019-02-02 13:30                         ` [PATCH v10 5/6] pack-redundant: rename pack_list.all_objects Jiang Xin
2019-02-02 13:30                         ` [PATCH v10 6/6] pack-redundant: consistent sort method Jiang Xin
2019-02-01 16:21                 ` [PATCH v9 2/6] pack-redundant: delay creation of unique_objects Jiang Xin
2019-02-01 16:21                 ` [PATCH v9 3/6] pack-redundant: delete redundant code Jiang Xin
2019-02-01 16:21                 ` [PATCH v9 4/6] pack-redundant: new algorithm to find min packs Jiang Xin
2019-02-01 16:21                 ` [PATCH v9 5/6] pack-redundant: rename pack_list.all_objects Jiang Xin
2019-02-01 16:21                 ` [PATCH v9 6/6] pack-redundant: consistent sort method Jiang Xin
2019-01-30 11:47               ` [PATCH v7 1/6] t5323: test cases for git-pack-redundant Jiang Xin
2019-01-31 21:44                 ` Junio C Hamano
2019-02-01  5:44                   ` Jiang Xin [this message]
2019-02-01  6:11                     ` Eric Sunshine
2019-02-01  7:23                       ` Jiang Xin
2019-02-01  7:25                         ` Jiang Xin
2019-02-01  9:51                       ` Jiang Xin
2019-01-30 11:47               ` [PATCH v7 2/6] pack-redundant: delay creation of unique_objects Jiang Xin
2019-01-30 11:47               ` [PATCH v7 3/6] pack-redundant: new algorithm to find min packs Jiang Xin
2019-01-31 19:30                 ` Junio C Hamano
2019-02-01  9:55                   ` Jiang Xin
2019-01-30 11:47               ` [PATCH v7 4/6] pack-redundant: remove unused functions Jiang Xin
2019-01-30 15:03                 ` [PATCH v8 1/1] pack-redundant: delete redundant code 16657101987
2019-01-30 11:47               ` [PATCH v7 5/6] pack-redundant: rename pack_list.all_objects Jiang Xin
2019-01-30 11:47               ` [PATCH v7 6/6] pack-redundant: consistent sort method Jiang Xin
2019-01-12  9:17             ` [PATCH v6 1/5] t5323: test cases for git-pack-redundant Jiang Xin
2019-01-12  9:17             ` [PATCH v6 2/5] pack-redundant: new algorithm to find min packs Jiang Xin
2019-01-12  9:17             ` [PATCH v6 3/5] pack-redundant: remove unused functions Jiang Xin
2019-01-12  9:17             ` [PATCH v6 4/5] pack-redundant: rename pack_list.all_objects Jiang Xin
2019-01-12  9:17             ` [PATCH v6 5/5] pack-redundant: consistent sort method Jiang Xin
2019-01-10 12:01           ` [PATCH v5 1/5] t5323: test cases for git-pack-redundant Jiang Xin
2019-01-10 21:11             ` Junio C Hamano
2019-01-11  1:59               ` Jiang Xin
2019-01-11 18:00                 ` Junio C Hamano
2019-01-10 12:01           ` [PATCH v5 2/5] pack-redundant: new algorithm to find min packs Jiang Xin
2019-01-11  1:19             ` SZEDER Gábor
2019-01-10 12:01           ` [PATCH v5 3/5] pack-redundant: rename pack_list.all_objects Jiang Xin
2019-01-10 12:01           ` [PATCH v5 4/5] pack-redundant: consistent sort method Jiang Xin
2019-01-10 20:05             ` SZEDER Gábor
2019-01-10 12:01           ` [PATCH v5 5/5] pack-redundant: remove unused functions Jiang Xin
2019-01-10  3:28         ` [PATCH v3 1/3] t5323: test cases for git-pack-redundant Jiang Xin
2019-01-10  7:11           ` Johannes Sixt
2019-01-10 11:57           ` SZEDER Gábor
2019-01-10 12:25             ` Torsten Bögershausen
2019-01-10 17:36             ` Junio C Hamano
2019-01-15 20:30             ` [PATCH/RFC v1 1/1] test-lint: sed -E (or -a, -l) are not portable tboegi
2019-01-15 21:09               ` Eric Sunshine
2019-01-16 11:24               ` Ævar Arnfjörð Bjarmason
2019-01-20  7:53             ` [PATCH/RFC v2 1/1] test-lint: Only use only sed [-n] [-e command] [-f command_file] tboegi
2019-01-22 19:47               ` Junio C Hamano
2019-01-22 20:00                 ` Torsten Bögershausen
2019-01-22 21:15                   ` Eric Sunshine
2019-01-23  6:35                     ` Torsten Bögershausen
2019-01-23 17:54                       ` Junio C Hamano
2019-01-25 19:12                         ` Torsten Bögershausen
2019-01-27 22:34                           ` Junio C Hamano
2019-01-02  4:34     ` [PATCH v3 2/3] pack-redundant: new algorithm to find min packs Jiang Xin
2019-01-02  4:34     ` [PATCH v3 3/3] pack-redundant: remove unused functions Jiang Xin
2019-01-08 16:40       ` [PATCH v4 0/1] " 16657101987
2019-01-08 19:30         ` Junio C Hamano
2019-01-09  0:29           ` 16657101987
2019-01-08 16:43       ` [PATCH v4 1/1] " 16657101987
2019-01-08 16:45       ` [PATCH v4 0/1] " 16657101987
2018-12-19 12:14   ` [PATCH v2 1/3] t5322: test cases for git-pack-redundant Jiang Xin
2018-12-19 12:14   ` [PATCH v2 2/3] pack-redundant: new algorithm to find min packs Jiang Xin
2018-12-19 12:14   ` [PATCH v2 3/3] pack-redundant: remove unused functions Jiang Xin

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