From: Jiang Xin <zhiyou.jx@xxxxxxxxxxxxxxx>
Add test cases for git pack-redundant to validate new algorithm for git
pack-redundant.
Signed-off-by: Jiang Xin <zhiyou.jx@xxxxxxxxxxxxxxx>
Reviewed-by: SZEDER Gábor <szeder.dev@xxxxxxxxx>
Helped-by: Eric Sunshine <sunshine@xxxxxxxxxxxxxx>
Reviewed-by: Sun Chao <sunchao9@xxxxxxxxxx>
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
t/t5323-pack-redundant.sh | 510 ++++++++++++++++++++++++++++++++++++++
1 file changed, 510 insertions(+)
create mode 100755 t/t5323-pack-redundant.sh
diff --git a/t/t5323-pack-redundant.sh b/t/t5323-pack-redundant.sh
new file mode 100755
index 0000000000..d224ff3c50
--- /dev/null
+++ b/t/t5323-pack-redundant.sh
@@ -0,0 +1,510 @@
+#!/bin/sh
+#
+# Copyright (c) 2018 Jiang Xin
+#
+
+test_description='Test git pack-redundant
+
+In order to test git-pack-redundant, we will create a number of objects and
+packs in the repository `master.git`. The relationship between packs (P1-P8)
+and objects (T, A-R) is showed in the following chart. Objects of a pack will
+be marked with letter x, while objects of redundant packs will be marked with
+exclamation point, and redundant pack itself will be marked with asterisk.
+
+ | 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* | ! ! ! ! ! ! !
+ P3 | x x x x x x
+ P4* | ! ! ! ! !
+ P5 | x x x x
+ P6* | ! ! !
+ P7 | x x
+ P8* | !
+ ----+--------------------------------------
+ ALL | x x x x x x x x x x x x x x x x x x x
+
+Another repository `shared.git` has unique objects (X-Z), while other objects
+(marked with letter s) are shared 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 | s s s x x x
+ Px2 | s s s x x x
+'
+
+. ./test-lib.sh
+
+master_repo=master.git
+shared_repo=shared.git
+
+# Note: DO NOT run it in a subshell, otherwise the variables will not be set
+# Usage: create_commits_in <repo> A B C ...
+create_commits_in () {
+ repo="$1" &&
+ parent=$(git -C "$repo" rev-parse HEAD^{} 2>/dev/null) || parent=
+ T=$(git -C "$repo" write-tree) &&
+ shift &&
+ while test $# -gt 0
+ do
+ name=$1 &&
+ test_tick &&
+ if test -z "$parent"
+ then
+ oid=$(echo $name | git -C "$repo" commit-tree $T)
+ else
+ oid=$(echo $name | git -C "$repo" commit-tree -p $parent $T)
+ fi &&
+ eval $name=$oid &&
+ parent=$oid &&
+ shift ||
+ return 1
+ done
+ git -C "$repo" update-ref refs/heads/master $oid
+}
+
+# Note: DO NOT run it in a subshell, otherwise the variables will not be set
+create_pack_1 () {
+ P1=$(git -C "$master_repo/objects/pack" pack-objects -q pack <<-EOF
+ $T
+ $A
+ $B
+ $C
+ $D
+ $E
+ $F
+ $R
+ EOF
+ ) &&
+ eval P$P1=P1:$P1
+}
+
+create_pack_2 () {
+ P2=$(git -C "$master_repo/objects/pack" pack-objects -q pack <<-EOF
+ $B
+ $C
+ $D
+ $E
+ $G
+ $H
+ $I
+ EOF
+ ) &&
+ eval P$P2=P2:$P2
+}
+
+create_pack_3 () {
+ P3=$(git -C "$master_repo/objects/pack" pack-objects -q pack <<-EOF
+ $F
+ $I
+ $J
+ $K
+ $L
+ $M
+ EOF
+ ) &&
+ eval P$P3=P3:$P3
+}
+
+create_pack_4 () {
+ P4=$(git -C "$master_repo/objects/pack" pack-objects -q pack <<-EOF
+ $J
+ $K
+ $L
+ $M
+ $P
+ EOF
+ ) &&
+ eval P$P4=P4:$P4
+}
+
+create_pack_5 () {
+ P5=$(git -C "$master_repo/objects/pack" pack-objects -q pack <<-EOF
+ $G
+ $H
+ $N
+ $O
+ EOF
+ ) &&
+ eval P$P5=P5:$P5
+}
+
+create_pack_6 () {
+ P6=$(git -C "$master_repo/objects/pack" pack-objects -q pack <<-EOF
+ $N
+ $O
+ $Q
+ EOF
+ ) &&
+ eval P$P6=P6:$P6
+}
+
+create_pack_7 () {
+ P7=$(git -C "$master_repo/objects/pack" pack-objects -q pack <<-EOF
+ $P
+ $Q
+ EOF
+ ) &&
+ eval P$P7=P7:$P7
+}
+
+create_pack_8 () {
+ P8=$(git -C "$master_repo/objects/pack" pack-objects -q pack <<-EOF
+ $A
+ EOF
+ ) &&
+ eval P$P8=P8:$P8
+}
+
+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 $p
+ else
+ eval echo "\${P$p}"
+ fi
+ done |
+ sort
+}
+
+test_expect_success 'setup master repo' '
+ git init --bare "$master_repo" &&
+ create_commits_in "$master_repo" A B C D E F G H I J K L M N O P Q R
+'
+
+#############################################################################
+# Chart of packs and objects for this test case
+#
+# | 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
+# ----+--------------------------------------
+# ALL | x x x x x x x x x x x x x x x
+#
+#############################################################################
+test_expect_success 'no redundant for pack 1, 2, 3' '
+ create_pack_1 && create_pack_2 && create_pack_3 &&
+ (
+ cd "$master_repo" &&
+ git pack-redundant --all >out &&
+ test_must_be_empty out
+ )
+'
+
+test_expect_success 'create pack 4, 5' '
+ create_pack_4 && create_pack_5
+'
+
+#############################################################################
+# Chart of packs and objects for this test case
+#
+# | T A B C D E F G H I J K L M N O P Q R
+# ----+--------------------------------------
+# P1 | x x x x x x x x
+# P2* | ! ! ! ! ! ! !
+# P3 | x x x x x x
+# P4 | x x x x x
+# P5 | x x x x
+# ----+--------------------------------------
+# ALL | x x x x x x x x x x x x x x x x x x
+#
+#############################################################################
+test_expect_success 'one of pack-2/pack-3 is redundant' '
+ (
+ cd "$master_repo" &&
+ cat >expect <<-EOF &&
+ P2:$P2
+ EOF
+ git pack-redundant --all >out &&
+ format_packfiles <out >actual &&
+ test_cmp expect actual
+ )
+'
+
+test_expect_success 'create pack 6, 7' '
+ create_pack_6 && create_pack_7
+'
+
+#############################################################################
+# Chart of packs and objects for this test case
+#
+# | T A B C D E F G H I J K L M N O P Q R
+# ----+--------------------------------------
+# P1 | x x x x x x x x
+# P2* | ! ! ! ! ! ! !
+# P3 | x x x x x x
+# P4* | ! ! ! ! !
+# P5 | x x x x
+# P6* | ! ! !
+# P7 | x x
+# ----+--------------------------------------
+# ALL | x x x x x x x x x x x x x x x x x x x
+#
+#############################################################################
+test_expect_success 'pack 2, 4, and 6 are redundant' '
+ (
+ cd "$master_repo" &&
+ cat >expect <<-EOF &&
+ P2:$P2
+ P4:$P4
+ P6:$P6
+ EOF
+ git pack-redundant --all >out &&
+ format_packfiles <out >actual &&
+ test_cmp expect actual
+ )
+'
+
+test_expect_success 'create pack 8' '
+ create_pack_8
+'
+
+#############################################################################
+# Chart of packs and objects for this test case
+#
+# | T A B C D E F G H I J K L M N O P Q R
+# ----+--------------------------------------
+# P1 | x x x x x x x x
+# P2* | ! ! ! ! ! ! !
+# P3 | x x x x x x
+# P4* | ! ! ! ! !
+# P5 | x x x x
+# P6* | ! ! !
+# P7 | x x
+# P8* | !
+# ----+--------------------------------------
+# ALL | x x x x x x x x x x x x x x x x x x x
+#
+#############################################################################
+test_expect_success 'pack-8 (subset of pack-1) is also redundant' '
+ (
+ cd "$master_repo" &&
+ cat >expect <<-EOF &&
+ P2:$P2
+ P4:$P4
+ P6:$P6
+ P8:$P8
+ EOF
+ git pack-redundant --all >out &&
+ format_packfiles <out >actual &&
+ test_cmp expect actual
+ )
+'
+
+test_expect_success 'clean loose objects' '
+ (
+ cd "$master_repo" &&
+ git prune-packed &&
+ find objects -type f | sed -e "/objects\/pack\//d" >out &&
+ test_must_be_empty out
+ )
+'
+
+test_expect_success 'remove redundant packs and pass fsck' '
+ (
+ cd "$master_repo" &&
+ git pack-redundant --all | xargs rm &&
+ git fsck &&
+ git pack-redundant --all >out &&
+ test_must_be_empty out
+ )
+'
+
+# The following test cases will execute inside `shared.git`, instead of
+# inside `master.git`.
+test_expect_success 'setup shared.git' '
+ git clone --mirror "$master_repo" "$shared_repo" &&
+ (
+ cd "$shared_repo" &&
+ printf "../../$master_repo/objects\n" >objects/info/alternates
+ )
+'
+
+test_expect_success 'no redundant packs without --alt-odb' '
+ (
+ cd "$shared_repo" &&
+ git pack-redundant --all >out &&
+ test_must_be_empty out
+ )
+'
+
+#############################################################################
+# Chart of packs and objects for this test case
+#
+# ================ master.git ===============
+# | T A B C D E F G H I J K L M N O P Q R <----------+
+# ----+-------------------------------------- |
+# P1 | x x x x x x x x |
+# P3 | x x x x x x |
+# P5 | x x x x |
+# P7 | x x |
+# ----+-------------------------------------- |
+# ALL | x x x x x x x x x x x x x x x x x x x |
+# |
+# |
+# ================ shared.git =============== |
+# | T A B C D E F G H I J K L M N O P Q R <objects/info/alternates>
+# ----+--------------------------------------
+# P1* | s s s s s s s s
+# P3* | s s s s s s
+# P5* | s s s s
+# P7* | s s
+# ----+--------------------------------------
+# ALL | x x x x x x x x x x x x x x x x x x x
+#
+#############################################################################
+test_expect_success 'pack-redundant --verbose: show duplicate packs in stderr' '
+ (
+ cd "$shared_repo" &&
+ cat >expect <<-EOF &&
+ P1:$P1
+ P3:$P3
+ P5:$P5
+ P7:$P7
+ EOF
+ git pack-redundant --all --verbose >out 2>out.err &&
+ test_must_be_empty out &&
+ grep "pack$" out.err | format_packfiles >actual &&
+ test_cmp expect actual
+ )
+'
+
+test_expect_success 'remove redundant packs by alt-odb, no packs left' '
+ (
+ cd "$shared_repo" &&
+ cat >expect <<-EOF &&
+ fatal: Zero packs found!
+ EOF
+ git pack-redundant --all --alt-odb | xargs rm &&
+ git fsck &&
+ test_must_fail git pack-redundant --all --alt-odb >actual 2>&1 &&
+ test_cmp expect actual
+ )
+'
+
+# Note: DO NOT run function `create_pack_*` in sub shell, or variables are not set
+create_pack_x1_in () {
+ repo="$1" &&
+ Px1=$(git -C "$repo/objects/pack" pack-objects -q pack <<-EOF
+ $X
+ $Y
+ $Z
+ $A
+ $B
+ $C
+ EOF
+ ) &&
+ eval P${Px1}=Px1:${Px1}
+}
+
+create_pack_x2_in () {
+ repo="$1" &&
+ Px2=$(git -C "$repo/objects/pack" pack-objects -q pack <<-EOF
+ $X
+ $Y
+ $Z
+ $D
+ $E
+ $F
+ EOF
+ ) &&
+ eval P${Px2}=Px2:${Px2}
+}
+
+test_expect_success 'create new objects and packs in shared.git' '
+ create_commits_in "$shared_repo" X Y Z &&
+ create_pack_x1_in "$shared_repo" &&
+ create_pack_x2_in "$shared_repo"
+'
+
+test_expect_success 'no redundant without --alt-odb' '
+ (
+ cd "$shared_repo" &&
+ git pack-redundant --all >out &&
+ test_must_be_empty out
+ )
+'
+
+#############################################################################
+# Chart of packs and objects for this test case
+#
+# ================ master.git ===============
+# | T A B C D E F G H I J K L M N O P Q R <----------------+
+# ----+-------------------------------------- |
+# P1 | x x x x x x x x |
+# P3 | x x x x x x |
+# P5 | x x x x |
+# P7 | x x |
+# ----+-------------------------------------- |
+# ALL | x x x x x x x x x x x x x x x x x x x |
+# |
+# |
+# ================ shared.git ======================= |
+# | T A B C D E F G H I J K L M N O P Q R X Y Z <objects/info/alternates>
+# ----+----------------------------------------------
+# Px1 | s s s x x x
+# Px2*| s s s ! ! !
+# ----+----------------------------------------------
+# ALL | s s s s s s s s s s s s s s s s s s s x x x
+#
+#############################################################################
+test_expect_success 'one pack is redundant' '
+ (
+ cd "$shared_repo" &&
+ git pack-redundant --all --alt-odb >out &&
+ format_packfiles <out >actual &&
+ test_line_count = 1 actual
+ )
+'
+
+#############################################################################
+# Chart of packs and objects for this test case
+#
+# ================ master.git ===============
+# | 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 |
+# P3 | x x x x x x |
+# P5 | x x x x |
+# P7 | x x |
+# ----+-------------------------------------- |
+# ALL | x x x x x x x x x x x x x x x x x x x |
+# |
+# |
+# ================ shared.git ======================= |
+# | T A B C D E F G H I J K L M N O P Q R X Y Z <objects/info/alternates>
+# ----+----------------------------------------------
+# Px1*| s s s i i i
+# Px2*| s s s i i i
+# ----+----------------------------------------------
+# ALL | s s s s s s s s s s s s s s s s s s s i i i
+# (ignored objects, marked with i)
+#
+#############################################################################
+test_expect_success 'set ignore objects and all two packs are redundant' '
+ (
+ cd "$shared_repo" &&
+ cat >expect <<-EOF &&
+ Px1:$Px1
+ Px2:$Px2
+ EOF
+ git pack-redundant --all --alt-odb >out <<-EOF &&
+ $X
+ $Y
+ $Z
+ EOF
+ format_packfiles <out >actual &&
+ test_cmp expect actual
+ )
+'
+
+test_done
--
2.20.1.103.ged0fc2ca7b
