This is a fairly complete list of tests for various aspects of pack
index versions 1 and 2.
Tests on index v2 include 32-bit and 64-bit offsets, as well as a nice
demonstration of the flawed repacking integrity checks that index
version 2 intend to solve over index version 1 with the per object CRC.
Signed-off-by: Nicolas Pitre <nico@xxxxxxx>
---
OK this should really be the last patch for this topic.
diff --git a/t/t5302-pack-index.sh b/t/t5302-pack-index.sh
new file mode 100755
index 0000000..3371964
--- /dev/null
+++ b/t/t5302-pack-index.sh
@@ -0,0 +1,147 @@
+#!/bin/sh
+#
+# Copyright (c) 2007 Nicolas Pitre
+#
+
+test_description='pack index with 64-bit offsets and object CRC'
+. ./test-lib.sh
+
+test_expect_success \
+ 'setup' \
+ 'rm -rf .git
+ git-init &&
+ for i in `seq -w 100`
+ do
+ echo $i >file_$i &&
+ dd if=/dev/urandom bs=8k count=1 >>file_$i &&
+ git-update-index --add file_$i || return 1
+ done &&
+ echo 101 >file_101 && tail -c 8k file_100 >>file_101 &&
+ git-update-index --add file_101 &&
+ tree=`git-write-tree` &&
+ commit=`git-commit-tree $tree </dev/null` && {
+ echo $tree &&
+ echo $commit &&
+ git-ls-tree $tree | sed -e "s/.* \\([0-9a-f]*\\) .*/\\1/"
+ } >obj-list &&
+ git-update-ref HEAD $commit'
+
+test_expect_success \
+ 'pack-objects with index version 1' \
+ 'pack1=$(git-pack-objects --index-version=1 test-1 <obj-list) &&
+ git-verify-pack -v "test-1-${pack1}.pack"'
+
+test_expect_success \
+ 'pack-objects with index version 2' \
+ 'pack2=$(git-pack-objects --index-version=2 test-2 <obj-list) &&
+ git-verify-pack -v "test-2-${pack2}.pack"'
+
+test_expect_success \
+ 'both packs should be identical' \
+ 'cmp "test-1-${pack1}.pack" "test-2-${pack2}.pack"'
+
+test_expect_failure \
+ 'index v1 and index v2 should be different' \
+ 'cmp "test-1-${pack1}.idx" "test-2-${pack2}.idx"'
+
+test_expect_success \
+ 'index-pack with index version 1' \
+ 'git-index-pack --index-version=1 -o 1.idx "test-1-${pack1}.pack"'
+
+test_expect_success \
+ 'index-pack with index version 2' \
+ 'git-index-pack --index-version=2 -o 2.idx "test-1-${pack1}.pack"'
+
+test_expect_success \
+ 'index-pack results should match pack-objects ones' \
+ 'cmp "test-1-${pack1}.idx" "1.idx" &&
+ cmp "test-2-${pack2}.idx" "2.idx"'
+
+test_expect_success \
+ 'index v2: force some 64-bit offsets with pack-objects' \
+ 'pack3=$(git-pack-objects --index-version=2,0x40000 test-3 <obj-list) &&
+ git-verify-pack -v "test-3-${pack3}.pack"'
+
+test_expect_failure \
+ '64-bit offsets: should be different from previous index v2 results' \
+ 'cmp "test-2-${pack2}.idx" "test-3-${pack3}.idx"'
+
+test_expect_success \
+ 'index v2: force some 64-bit offsets with index-pack' \
+ 'git-index-pack --index-version=2,0x40000 -o 3.idx "test-1-${pack1}.pack"'
+
+test_expect_success \
+ '64-bit offsets: index-pack result should match pack-objects one' \
+ 'cmp "test-3-${pack3}.idx" "3.idx"'
+
+test_expect_success \
+ '[index v1] 1) stream pack to repository' \
+ 'git-index-pack --index-version=1 --stdin < "test-1-${pack1}.pack" &&
+ git-prune-packed &&
+ test "`git-count-objects`" = "0 objects, 0 kilobytes" &&
+ cmp "test-1-${pack1}.pack" ".git/objects/pack/pack-${pack1}.pack" &&
+ cmp "test-1-${pack1}.idx" ".git/objects/pack/pack-${pack1}.idx"'
+
+test_expect_success \
+ '[index v1] 2) create a stealth corruption in a delta base reference' \
+ '# this test assumes a delta smaller than 16 bytes at the end of the pack
+ git-show-index <1.idx | sort -n | tail -n 1 | (
+ read delta_offs delta_sha1 &&
+ git-cat-file blob "$delta_sha1" > blob_1 &&
+ chmod +w ".git/objects/pack/pack-${pack1}.pack" &&
+ dd of=".git/objects/pack/pack-${pack1}.pack" seek=$(($delta_offs + 1)) \
+ if=".git/objects/pack/pack-${pack1}.idx" skip=$((256 * 4 + 4)) \
+ bs=1 count=20 conv=notrunc &&
+ git-cat-file blob "$delta_sha1" > blob_2 )'
+
+test_expect_failure \
+ '[index v1] 3) corrupted delta happily returned wrong data' \
+ 'cmp blob_1 blob_2'
+
+test_expect_failure \
+ '[index v1] 4) confirm that the pack is actually corrupted' \
+ 'git-fsck --full $commit'
+
+test_expect_success \
+ '[index v1] 5) pack-objects happily reuses corrupted data' \
+ 'pack4=$(git-pack-objects test-4 <obj-list) &&
+ test -f "test-4-${pack1}.pack"'
+
+test_expect_failure \
+ '[index v1] 6) newly created pack is BAD !' \
+ 'git-verify-pack -v "test-4-${pack1}.pack"'
+
+test_expect_success \
+ '[index v2] 1) stream pack to repository' \
+ 'rm -f .git/objects/pack/* &&
+ git-index-pack --index-version=2,0x40000 --stdin < "test-1-${pack1}.pack" &&
+ git-prune-packed &&
+ test "`git-count-objects`" = "0 objects, 0 kilobytes" &&
+ cmp "test-1-${pack1}.pack" ".git/objects/pack/pack-${pack1}.pack" &&
+ cmp "test-3-${pack1}.idx" ".git/objects/pack/pack-${pack1}.idx"'
+
+test_expect_success \
+ '[index v2] 2) create a stealth corruption in a delta base reference' \
+ '# this test assumes a delta smaller than 16 bytes at the end of the pack
+ git-show-index <1.idx | sort -n | tail -n 1 | (
+ read delta_offs delta_sha1 delta_crc &&
+ git-cat-file blob "$delta_sha1" > blob_3 &&
+ chmod +w ".git/objects/pack/pack-${pack1}.pack" &&
+ dd of=".git/objects/pack/pack-${pack1}.pack" seek=$(($delta_offs + 1)) \
+ if=".git/objects/pack/pack-${pack1}.idx" skip=$((8 + 256 * 4)) \
+ bs=1 count=20 conv=notrunc &&
+ git-cat-file blob "$delta_sha1" > blob_4 )'
+
+test_expect_failure \
+ '[index v2] 3) corrupted delta happily returned wrong data' \
+ 'cmp blob_3 blob_4'
+
+test_expect_failure \
+ '[index v2] 4) confirm that the pack is actually corrupted' \
+ 'git-fsck --full $commit'
+
+test_expect_failure \
+ '[index v2] 5) pack-objects refuses to reuse corrupted data' \
+ 'git-pack-objects test-5 <obj-list'
+
+test_done
-
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