Jiang Xin <worldhello....@gmail.com> writes:
> diff --git a/t/t5323-pack-redundant.sh b/t/t5323-pack-redundant.sh
> new file mode 100755
> index 0000000000..710fe9884c
> --- /dev/null
> +++ b/t/t5323-pack-redundant.sh
> @@ -0,0 +1,322 @@
> +#!/bin/sh
> +#
> +# Copyright (c) 2018 Jiang Xin
> +#
> +
> +test_description='git pack-redundant test'
> +
> +. ./test-lib.sh
> +
> +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.
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)?
> +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_$n helpers we saw earlier, so an unknown
packfile would be detected as a line that this emits. Is that the
idea?
> + else
> + eval echo "\${P$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.
> +test_expect_success 'no redundant for pack 1, 2, 3' '
> + create_pack_1 && create_pack_2 && create_pack_3 &&
> + git pack-redundant --all >out &&
> + test_must_be_empty out
> +'
> +
> +test_expect_success 'create pack 4, 5' '
> + create_pack_4 && create_pack_5
> +'
> +
> +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
'
Again, I needed to draw this to see if the "one of ... is redundant"
in the title is a valid claim. Something like it would help future
readers.
T A B C D E F G H I J K L M N O P Q R
1245 x x x x x x x x x x x x x x x x x
3 x x x x x x
T A B C D E F G H I J K L M N O P Q R
1345 x x x x x x x x x x x x x x x x x
2 x x x x x x x
I won't repeat the same for tests that appear later in this file,
but they share the same issue.
> +test_expect_success 'setup shared.git' '
> + cd "$TRASH_DIRECTORY" &&
> + git clone -q --mirror master.git shared.git &&
Why "-q"?
> + cd shared.git &&
> + printf "../../master.git/objects" >objects/info/alternates
> +'
Why not echo? I recall designing the alternates file to be a plain
text file. Is it necessary to leave the line incomplete?
> +test_expect_success 'remove redundant packs by alt-odb, no packs left' '
> + git pack-redundant --all --alt-odb | xargs rm &&
> + git fsck --no-progress &&
Why "--no-progress"?
> + test_must_fail git pack-redundant --all --alt-odb >actual 2>&1 &&
> + test_cmp expected actual
> +'
> +
> +create_commits_others () {
> + parent=$(git rev-parse HEAD)
If this fails, you'd still go ahead and enter the loop, which is not
what you want.
> + for name in X Y Z
> + do
> + test_tick &&
> + T=$(git write-tree) &&
Lift this outside the loop.
> + if test -z "$parent"
> + then
> + oid=$(echo $name | git commit-tree $T)
> + else
> + oid=$(echo $name | git commit-tree -p $parent $T)
> + fi &&
> + eval $name=$oid &&
> + parent=$oid ||
> + return 1
> + done
> + git update-ref refs/heads/master $Z
> +}
