[thirdparty/git.git] / t / t5318-commit-graph.sh

#!/bin/sh

test_description='commit graph'
. ./test-lib.sh

test_expect_success 'setup full repo' '
	mkdir full &&
	cd "$TRASH_DIRECTORY/full" &&
	git init &&
	git config core.commitGraph true &&
	objdir=".git/objects" &&
	test_oid_init
'

test_expect_success 'verify graph with no graph file' '
	cd "$TRASH_DIRECTORY/full" &&
	git commit-graph verify
'

test_expect_success 'write graph with no packs' '
	cd "$TRASH_DIRECTORY/full" &&
	git commit-graph write --object-dir . &&
	test_path_is_missing info/commit-graph
'

test_expect_success 'close with correct error on bad input' '
	cd "$TRASH_DIRECTORY/full" &&
	echo doesnotexist >in &&
	test_expect_code 1 git commit-graph write --stdin-packs <in 2>stderr &&
	test_i18ngrep "error adding pack" stderr
'

test_expect_success 'create commits and repack' '
	cd "$TRASH_DIRECTORY/full" &&
	for i in $(test_seq 3)
	do
		test_commit $i &&
		git branch commits/$i
	done &&
	git repack
'

graph_git_two_modes() {
	git -c core.commitGraph=true $1 >output
	git -c core.commitGraph=false $1 >expect
	test_cmp expect output
}

graph_git_behavior() {
	MSG=$1
	DIR=$2
	BRANCH=$3
	COMPARE=$4
	test_expect_success "check normal git operations: $MSG" '
		cd "$TRASH_DIRECTORY/$DIR" &&
		graph_git_two_modes "log --oneline $BRANCH" &&
		graph_git_two_modes "log --topo-order $BRANCH" &&
		graph_git_two_modes "log --graph $COMPARE..$BRANCH" &&
		graph_git_two_modes "branch -vv" &&
		graph_git_two_modes "merge-base -a $BRANCH $COMPARE"
	'
}

graph_git_behavior 'no graph' full commits/3 commits/1

graph_read_expect() {
	OPTIONAL=""
	NUM_CHUNKS=3
	if test ! -z $2
	then
		OPTIONAL=" $2"
		NUM_CHUNKS=$((3 + $(echo "$2" | wc -w)))
	fi
	cat >expect <<- EOF
	header: 43475048 1 1 $NUM_CHUNKS 0
	num_commits: $1
	chunks: oid_fanout oid_lookup commit_metadata$OPTIONAL
	EOF
	git commit-graph read >output &&
	test_cmp expect output
}

test_expect_success 'write graph' '
	cd "$TRASH_DIRECTORY/full" &&
	git commit-graph write &&
	test_path_is_file $objdir/info/commit-graph &&
	graph_read_expect "3"
'

graph_git_behavior 'graph exists' full commits/3 commits/1

test_expect_success 'Add more commits' '
	cd "$TRASH_DIRECTORY/full" &&
	git reset --hard commits/1 &&
	for i in $(test_seq 4 5)
	do
		test_commit $i &&
		git branch commits/$i
	done &&
	git reset --hard commits/2 &&
	for i in $(test_seq 6 7)
	do
		test_commit $i &&
		git branch commits/$i
	done &&
	git reset --hard commits/2 &&
	git merge commits/4 &&
	git branch merge/1 &&
	git reset --hard commits/4 &&
	git merge commits/6 &&
	git branch merge/2 &&
	git reset --hard commits/3 &&
	git merge commits/5 commits/7 &&
	git branch merge/3 &&
	git repack
'

# Current graph structure:
#
#   __M3___
#  /   |   \
# 3 M1 5 M2 7
# |/  \|/  \|
# 2    4    6
# |___/____/
# 1

test_expect_success 'write graph with merges' '
	cd "$TRASH_DIRECTORY/full" &&
	git commit-graph write &&
	test_path_is_file $objdir/info/commit-graph &&
	graph_read_expect "10" "extra_edges"
'

graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3

test_expect_success 'Add one more commit' '
	cd "$TRASH_DIRECTORY/full" &&
	test_commit 8 &&
	git branch commits/8 &&
	ls $objdir/pack | grep idx >existing-idx &&
	git repack &&
	ls $objdir/pack| grep idx | grep -v -f existing-idx >new-idx
'

# Current graph structure:
#
#      8
#      |
#   __M3___
#  /   |   \
# 3 M1 5 M2 7
# |/  \|/  \|
# 2    4    6
# |___/____/
# 1

graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2

test_expect_success 'write graph with new commit' '
	cd "$TRASH_DIRECTORY/full" &&
	git commit-graph write &&
	test_path_is_file $objdir/info/commit-graph &&
	graph_read_expect "11" "extra_edges"
'

graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2

test_expect_success 'write graph with nothing new' '
	cd "$TRASH_DIRECTORY/full" &&
	git commit-graph write &&
	test_path_is_file $objdir/info/commit-graph &&
	graph_read_expect "11" "extra_edges"
'

graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2

test_expect_success 'build graph from latest pack with closure' '
	cd "$TRASH_DIRECTORY/full" &&
	cat new-idx | git commit-graph write --stdin-packs &&
	test_path_is_file $objdir/info/commit-graph &&
	graph_read_expect "9" "extra_edges"
'

graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2

test_expect_success 'build graph from commits with closure' '
	cd "$TRASH_DIRECTORY/full" &&
	git tag -a -m "merge" tag/merge merge/2 &&
	git rev-parse tag/merge >commits-in &&
	git rev-parse merge/1 >>commits-in &&
	cat commits-in | git commit-graph write --stdin-commits &&
	test_path_is_file $objdir/info/commit-graph &&
	graph_read_expect "6"
'

graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2

test_expect_success 'build graph from commits with append' '
	cd "$TRASH_DIRECTORY/full" &&
	git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
	test_path_is_file $objdir/info/commit-graph &&
	graph_read_expect "10" "extra_edges"
'

graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2

test_expect_success 'build graph using --reachable' '
	cd "$TRASH_DIRECTORY/full" &&
	git commit-graph write --reachable &&
	test_path_is_file $objdir/info/commit-graph &&
	graph_read_expect "11" "extra_edges"
'

graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2

test_expect_success 'setup bare repo' '
	cd "$TRASH_DIRECTORY" &&
	git clone --bare --no-local full bare &&
	cd bare &&
	git config core.commitGraph true &&
	baredir="./objects"
'

graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2

test_expect_success 'write graph in bare repo' '
	cd "$TRASH_DIRECTORY/bare" &&
	git commit-graph write &&
	test_path_is_file $baredir/info/commit-graph &&
	graph_read_expect "11" "extra_edges"
'

graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2

test_expect_success 'perform fast-forward merge in full repo' '
	cd "$TRASH_DIRECTORY/full" &&
	git checkout -b merge-5-to-8 commits/5 &&
	git merge commits/8 &&
	git show-ref -s merge-5-to-8 >output &&
	git show-ref -s commits/8 >expect &&
	test_cmp expect output
'

test_expect_success 'check that gc computes commit-graph' '
	cd "$TRASH_DIRECTORY/full" &&
	git commit --allow-empty -m "blank" &&
	git commit-graph write --reachable &&
	cp $objdir/info/commit-graph commit-graph-before-gc &&
	git reset --hard HEAD~1 &&
	git config gc.writeCommitGraph true &&
	git gc &&
	cp $objdir/info/commit-graph commit-graph-after-gc &&
	! test_cmp_bin commit-graph-before-gc commit-graph-after-gc &&
	git commit-graph write --reachable &&
	test_cmp_bin commit-graph-after-gc $objdir/info/commit-graph
'

test_expect_success 'replace-objects invalidates commit-graph' '
	cd "$TRASH_DIRECTORY" &&
	test_when_finished rm -rf replace &&
	git clone full replace &&
	(
		cd replace &&
		git commit-graph write --reachable &&
		test_path_is_file .git/objects/info/commit-graph &&
		git replace HEAD~1 HEAD~2 &&
		git -c core.commitGraph=false log >expect &&
		git -c core.commitGraph=true log >actual &&
		test_cmp expect actual &&
		git commit-graph write --reachable &&
		git -c core.commitGraph=false --no-replace-objects log >expect &&
		git -c core.commitGraph=true --no-replace-objects log >actual &&
		test_cmp expect actual &&
		rm -rf .git/objects/info/commit-graph &&
		git commit-graph write --reachable &&
		test_path_is_file .git/objects/info/commit-graph
	)
'

test_expect_success 'commit grafts invalidate commit-graph' '
	cd "$TRASH_DIRECTORY" &&
	test_when_finished rm -rf graft &&
	git clone full graft &&
	(
		cd graft &&
		git commit-graph write --reachable &&
		test_path_is_file .git/objects/info/commit-graph &&
		H1=$(git rev-parse --verify HEAD~1) &&
		H3=$(git rev-parse --verify HEAD~3) &&
		echo "$H1 $H3" >.git/info/grafts &&
		git -c core.commitGraph=false log >expect &&
		git -c core.commitGraph=true log >actual &&
		test_cmp expect actual &&
		git commit-graph write --reachable &&
		git -c core.commitGraph=false --no-replace-objects log >expect &&
		git -c core.commitGraph=true --no-replace-objects log >actual &&
		test_cmp expect actual &&
		rm -rf .git/objects/info/commit-graph &&
		git commit-graph write --reachable &&
		test_path_is_missing .git/objects/info/commit-graph
	)
'

test_expect_success 'replace-objects invalidates commit-graph' '
	cd "$TRASH_DIRECTORY" &&
	test_when_finished rm -rf shallow &&
	git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
	(
		cd shallow &&
		git commit-graph write --reachable &&
		test_path_is_missing .git/objects/info/commit-graph &&
		git fetch origin --unshallow &&
		git commit-graph write --reachable &&
		test_path_is_file .git/objects/info/commit-graph
	)
'

# the verify tests below expect the commit-graph to contain
# exactly the commits reachable from the commits/8 branch.
# If the file changes the set of commits in the list, then the
# offsets into the binary file will result in different edits
# and the tests will likely break.

test_expect_success 'git commit-graph verify' '
	cd "$TRASH_DIRECTORY/full" &&
	git rev-parse commits/8 | git commit-graph write --stdin-commits &&
	git commit-graph verify >output
'

NUM_COMMITS=9
NUM_OCTOPUS_EDGES=2
HASH_LEN="$(test_oid rawsz)"
GRAPH_BYTE_VERSION=4
GRAPH_BYTE_HASH=5
GRAPH_BYTE_CHUNK_COUNT=6
GRAPH_CHUNK_LOOKUP_OFFSET=8
GRAPH_CHUNK_LOOKUP_WIDTH=12
GRAPH_CHUNK_LOOKUP_ROWS=5
GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
			    1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
			     2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
		       $GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
			     $GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))

corrupt_graph_setup() {
	cd "$TRASH_DIRECTORY/full" &&
	test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
	cp $objdir/info/commit-graph commit-graph-backup
}

corrupt_graph_verify() {
	grepstr=$1
	test_must_fail git commit-graph verify 2>test_err &&
	grep -v "^+" test_err >err &&
	test_i18ngrep "$grepstr" err &&
	if test "$2" != "no-copy"
	then
		cp $objdir/info/commit-graph commit-graph-pre-write-test
	fi &&
	git status --short &&
	GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD=true git commit-graph write &&
	git commit-graph verify
}

# usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
# Manipulates the commit-graph file at the position
# by inserting the data, optionally zeroing the file
# starting at <zero_pos>, then runs 'git commit-graph verify'
# and places the output in the file 'err'. Test 'err' for
# the given string.
corrupt_graph_and_verify() {
	pos=$1
	data="${2:-\0}"
	grepstr=$3
	corrupt_graph_setup &&
	orig_size=$(wc -c < $objdir/info/commit-graph) &&
	zero_pos=${4:-${orig_size}} &&
	printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
	dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
	generate_zero_bytes $(($orig_size - $zero_pos)) >>"$objdir/info/commit-graph" &&
	corrupt_graph_verify "$grepstr"

}

test_expect_success POSIXPERM,SANITY 'detect permission problem' '
	corrupt_graph_setup &&
	chmod 000 $objdir/info/commit-graph &&
	corrupt_graph_verify "Could not open" "no-copy"
'

test_expect_success 'detect too small' '
	corrupt_graph_setup &&
	echo "a small graph" >$objdir/info/commit-graph &&
	corrupt_graph_verify "too small"
'

test_expect_success 'detect bad signature' '
	corrupt_graph_and_verify 0 "\0" \
		"graph signature"
'

test_expect_success 'detect bad version' '
	corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
		"graph version"
'

test_expect_success 'detect bad hash version' '
	corrupt_graph_and_verify $GRAPH_BYTE_HASH "\02" \
		"hash version"
'

test_expect_success 'detect low chunk count' '
	corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\02" \
		"missing the .* chunk"
'

test_expect_success 'detect missing OID fanout chunk' '
	corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
		"missing the OID Fanout chunk"
'

test_expect_success 'detect missing OID lookup chunk' '
	corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
		"missing the OID Lookup chunk"
'

test_expect_success 'detect missing commit data chunk' '
	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
		"missing the Commit Data chunk"
'

test_expect_success 'detect incorrect fanout' '
	corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
		"fanout value"
'

test_expect_success 'detect incorrect fanout final value' '
	corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
		"fanout value"
'

test_expect_success 'detect incorrect OID order' '
	corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
		"incorrect OID order"
'

test_expect_success 'detect OID not in object database' '
	corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
		"from object database"
'

test_expect_success 'detect incorrect tree OID' '
	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
		"root tree OID for commit"
'

test_expect_success 'detect incorrect parent int-id' '
	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
		"invalid parent"
'

test_expect_success 'detect extra parent int-id' '
	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
		"is too long"
'

test_expect_success 'detect wrong parent' '
	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
		"commit-graph parent for"
'

test_expect_success 'detect incorrect generation number' '
	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
		"generation for commit"
'

test_expect_success 'detect incorrect generation number' '
	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \
		"non-zero generation number"
'

test_expect_success 'detect incorrect commit date' '
	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
		"commit date"
'

test_expect_success 'detect incorrect parent for octopus merge' '
	corrupt_graph_and_verify $GRAPH_BYTE_OCTOPUS "\01" \
		"invalid parent"
'

test_expect_success 'detect invalid checksum hash' '
	corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
		"incorrect checksum"
'

test_expect_success 'detect incorrect chunk count' '
	corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\377" \
		"chunk lookup table entry missing" $GRAPH_CHUNK_LOOKUP_OFFSET
'

test_expect_success 'git fsck (checks commit-graph)' '
	cd "$TRASH_DIRECTORY/full" &&
	git fsck &&
	corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
		"incorrect checksum" &&
	cp commit-graph-pre-write-test $objdir/info/commit-graph &&
	test_must_fail git fsck
'

test_expect_success 'setup non-the_repository tests' '
	rm -rf repo &&
	git init repo &&
	test_commit -C repo one &&
	test_commit -C repo two &&
	git -C repo config core.commitGraph true &&
	git -C repo rev-parse two | \
		git -C repo commit-graph write --stdin-commits
'

test_expect_success 'parse_commit_in_graph works for non-the_repository' '
	test-tool repository parse_commit_in_graph \
		repo/.git repo "$(git -C repo rev-parse two)" >actual &&
	{
		git -C repo log --pretty=format:"%ct " -1 &&
		git -C repo rev-parse one
	} >expect &&
	test_cmp expect actual &&

	test-tool repository parse_commit_in_graph \
		repo/.git repo "$(git -C repo rev-parse one)" >actual &&
	git -C repo log --pretty="%ct" -1 one >expect &&
	test_cmp expect actual
'

test_expect_success 'get_commit_tree_in_graph works for non-the_repository' '
	test-tool repository get_commit_tree_in_graph \
		repo/.git repo "$(git -C repo rev-parse two)" >actual &&
	git -C repo rev-parse two^{tree} >expect &&
	test_cmp expect actual &&

	test-tool repository get_commit_tree_in_graph \
		repo/.git repo "$(git -C repo rev-parse one)" >actual &&
	git -C repo rev-parse one^{tree} >expect &&
	test_cmp expect actual
'

test_done
Commit	Line	Data
f237c8b6 DS	1	#!/bin/sh
	2
	3	test_description='commit graph'
	4	. ./test-lib.sh
	5
	6	test_expect_success 'setup full repo' '
	7	mkdir full &&
	8	cd "$TRASH_DIRECTORY/full" &&
	9	git init &&
177722b3	10	git config core.commitGraph true &&
ae0c89d4 DS	11	objdir=".git/objects" &&
ae0c89d4 DS	12	test_oid_init
f237c8b6 DS	13	'
f237c8b6 DS	14
283e68c7 DS	15	test_expect_success 'verify graph with no graph file' '
	16	cd "$TRASH_DIRECTORY/full" &&
	17	git commit-graph verify
	18	'
	19
f237c8b6 DS	20	test_expect_success 'write graph with no packs' '
	21	cd "$TRASH_DIRECTORY/full" &&
	22	git commit-graph write --object-dir . &&
6c622f9f	23	test_path_is_missing info/commit-graph
f237c8b6 DS	24	'
f237c8b6 DS	25
e103f727 DS	26	test_expect_success 'close with correct error on bad input' '
	27	cd "$TRASH_DIRECTORY/full" &&
	28	echo doesnotexist >in &&
9916073b	29	test_expect_code 1 git commit-graph write --stdin-packs <in 2>stderr &&
e103f727 DS	30	test_i18ngrep "error adding pack" stderr
	31	'
	32
f237c8b6 DS	33	test_expect_success 'create commits and repack' '
	34	cd "$TRASH_DIRECTORY/full" &&
	35	for i in $(test_seq 3)
	36	do
	37	test_commit $i &&
	38	git branch commits/$i
	39	done &&
	40	git repack
	41	'
	42
177722b3	43	graph_git_two_modes() {
55abcb41 DS	44	git -c core.commitGraph=true $1 >output
55abcb41 DS	45	git -c core.commitGraph=false $1 >expect
dcbaa0b3	46	test_cmp expect output
177722b3 DS	47	}
	48
	49	graph_git_behavior() {
	50	MSG=$1
	51	DIR=$2
	52	BRANCH=$3
	53	COMPARE=$4
	54	test_expect_success "check normal git operations: $MSG" '
	55	cd "$TRASH_DIRECTORY/$DIR" &&
	56	graph_git_two_modes "log --oneline $BRANCH" &&
	57	graph_git_two_modes "log --topo-order $BRANCH" &&
	58	graph_git_two_modes "log --graph $COMPARE..$BRANCH" &&
	59	graph_git_two_modes "branch -vv" &&
	60	graph_git_two_modes "merge-base -a $BRANCH $COMPARE"
	61	'
	62	}
	63
	64	graph_git_behavior 'no graph' full commits/3 commits/1
	65
2a2e32bd DS	66	graph_read_expect() {
	67	OPTIONAL=""
	68	NUM_CHUNKS=3
	69	if test ! -z $2
	70	then
	71	OPTIONAL=" $2"
	72	NUM_CHUNKS=$((3 + $(echo "$2" \| wc -w)))
	73	fi
	74	cat >expect <<- EOF
	75	header: 43475048 1 1 $NUM_CHUNKS 0
	76	num_commits: $1
	77	chunks: oid_fanout oid_lookup commit_metadata$OPTIONAL
	78	EOF
	79	git commit-graph read >output &&
	80	test_cmp expect output
	81	}
	82
f237c8b6 DS	83	test_expect_success 'write graph' '
f237c8b6 DS	84	cd "$TRASH_DIRECTORY/full" &&
0b918b75	85	git commit-graph write &&
2a2e32bd DS	86	test_path_is_file $objdir/info/commit-graph &&
2a2e32bd DS	87	graph_read_expect "3"
f237c8b6 DS	88	'
f237c8b6 DS	89
177722b3 DS	90	graph_git_behavior 'graph exists' full commits/3 commits/1
177722b3 DS	91
f237c8b6 DS	92	test_expect_success 'Add more commits' '
	93	cd "$TRASH_DIRECTORY/full" &&
	94	git reset --hard commits/1 &&
	95	for i in $(test_seq 4 5)
	96	do
	97	test_commit $i &&
	98	git branch commits/$i
	99	done &&
	100	git reset --hard commits/2 &&
	101	for i in $(test_seq 6 7)
	102	do
	103	test_commit $i &&
	104	git branch commits/$i
	105	done &&
	106	git reset --hard commits/2 &&
	107	git merge commits/4 &&
	108	git branch merge/1 &&
	109	git reset --hard commits/4 &&
	110	git merge commits/6 &&
	111	git branch merge/2 &&
	112	git reset --hard commits/3 &&
	113	git merge commits/5 commits/7 &&
	114	git branch merge/3 &&
	115	git repack
	116	'
	117
	118	# Current graph structure:
	119	#
	120	# __M3___
	121	# / \| \
	122	# 3 M1 5 M2 7
	123	# \|/ \\|/ \\|
	124	# 2 4 6
	125	# \|___/____/
	126	# 1
	127
f237c8b6 DS	128	test_expect_success 'write graph with merges' '
	129	cd "$TRASH_DIRECTORY/full" &&
	130	git commit-graph write &&
2a2e32bd	131	test_path_is_file $objdir/info/commit-graph &&
5af7417b	132	graph_read_expect "10" "extra_edges"
f237c8b6 DS	133	'
f237c8b6 DS	134
177722b3 DS	135	graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
	136	graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
	137	graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
	138
f237c8b6 DS	139	test_expect_success 'Add one more commit' '
	140	cd "$TRASH_DIRECTORY/full" &&
	141	test_commit 8 &&
	142	git branch commits/8 &&
	143	ls $objdir/pack \| grep idx >existing-idx &&
	144	git repack &&
4a3ed638	145	ls $objdir/pack\| grep idx \| grep -v -f existing-idx >new-idx
f237c8b6 DS	146	'
	147
	148	# Current graph structure:
	149	#
	150	# 8
	151	# \|
	152	# __M3___
	153	# / \| \
	154	# 3 M1 5 M2 7
	155	# \|/ \\|/ \\|
	156	# 2 4 6
	157	# \|___/____/
	158	# 1
	159
177722b3 DS	160	graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
	161	graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
	162
f237c8b6 DS	163	test_expect_success 'write graph with new commit' '
	164	cd "$TRASH_DIRECTORY/full" &&
	165	git commit-graph write &&
2a2e32bd	166	test_path_is_file $objdir/info/commit-graph &&
5af7417b	167	graph_read_expect "11" "extra_edges"
f237c8b6 DS	168	'
f237c8b6 DS	169
177722b3 DS	170	graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
	171	graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
	172
f237c8b6 DS	173	test_expect_success 'write graph with nothing new' '
	174	cd "$TRASH_DIRECTORY/full" &&
	175	git commit-graph write &&
2a2e32bd	176	test_path_is_file $objdir/info/commit-graph &&
5af7417b	177	graph_read_expect "11" "extra_edges"
f237c8b6 DS	178	'
f237c8b6 DS	179
177722b3 DS	180	graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
	181	graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
	182
049d51a2 DS	183	test_expect_success 'build graph from latest pack with closure' '
	184	cd "$TRASH_DIRECTORY/full" &&
	185	cat new-idx \| git commit-graph write --stdin-packs &&
	186	test_path_is_file $objdir/info/commit-graph &&
5af7417b	187	graph_read_expect "9" "extra_edges"
049d51a2 DS	188	'
	189
	190	graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
	191	graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
	192
3d5df01b DS	193	test_expect_success 'build graph from commits with closure' '
	194	cd "$TRASH_DIRECTORY/full" &&
	195	git tag -a -m "merge" tag/merge merge/2 &&
	196	git rev-parse tag/merge >commits-in &&
	197	git rev-parse merge/1 >>commits-in &&
	198	cat commits-in \| git commit-graph write --stdin-commits &&
	199	test_path_is_file $objdir/info/commit-graph &&
	200	graph_read_expect "6"
	201	'
	202
	203	graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
	204	graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
	205
7547b95b DS	206	test_expect_success 'build graph from commits with append' '
	207	cd "$TRASH_DIRECTORY/full" &&
	208	git rev-parse merge/3 \| git commit-graph write --stdin-commits --append &&
	209	test_path_is_file $objdir/info/commit-graph &&
5af7417b	210	graph_read_expect "10" "extra_edges"
7547b95b DS	211	'
	212
	213	graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
	214	graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
	215
59fb8770 DS	216	test_expect_success 'build graph using --reachable' '
	217	cd "$TRASH_DIRECTORY/full" &&
	218	git commit-graph write --reachable &&
	219	test_path_is_file $objdir/info/commit-graph &&
5af7417b	220	graph_read_expect "11" "extra_edges"
59fb8770 DS	221	'
	222
	223	graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
	224	graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
	225
f237c8b6 DS	226	test_expect_success 'setup bare repo' '
	227	cd "$TRASH_DIRECTORY" &&
	228	git clone --bare --no-local full bare &&
	229	cd bare &&
177722b3	230	git config core.commitGraph true &&
f237c8b6 DS	231	baredir="./objects"
	232	'
	233
177722b3 DS	234	graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
	235	graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2
	236
f237c8b6 DS	237	test_expect_success 'write graph in bare repo' '
	238	cd "$TRASH_DIRECTORY/bare" &&
	239	git commit-graph write &&
2a2e32bd	240	test_path_is_file $baredir/info/commit-graph &&
5af7417b	241	graph_read_expect "11" "extra_edges"
f237c8b6 DS	242	'
f237c8b6 DS	243
177722b3 DS	244	graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
	245	graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
	246
7adf5266 DS	247	test_expect_success 'perform fast-forward merge in full repo' '
	248	cd "$TRASH_DIRECTORY/full" &&
	249	git checkout -b merge-5-to-8 commits/5 &&
	250	git merge commits/8 &&
	251	git show-ref -s merge-5-to-8 >output &&
	252	git show-ref -s commits/8 >expect &&
	253	test_cmp expect output
	254	'
	255
d5d5d7b6 DS	256	test_expect_success 'check that gc computes commit-graph' '
	257	cd "$TRASH_DIRECTORY/full" &&
	258	git commit --allow-empty -m "blank" &&
	259	git commit-graph write --reachable &&
	260	cp $objdir/info/commit-graph commit-graph-before-gc &&
	261	git reset --hard HEAD~1 &&
	262	git config gc.writeCommitGraph true &&
	263	git gc &&
	264	cp $objdir/info/commit-graph commit-graph-after-gc &&
eb7cc5bc	265	! test_cmp_bin commit-graph-before-gc commit-graph-after-gc &&
d5d5d7b6	266	git commit-graph write --reachable &&
eb7cc5bc	267	test_cmp_bin commit-graph-after-gc $objdir/info/commit-graph
d5d5d7b6 DS	268	'
d5d5d7b6 DS	269
d6538246 DS	270	test_expect_success 'replace-objects invalidates commit-graph' '
	271	cd "$TRASH_DIRECTORY" &&
	272	test_when_finished rm -rf replace &&
	273	git clone full replace &&
	274	(
	275	cd replace &&
	276	git commit-graph write --reachable &&
	277	test_path_is_file .git/objects/info/commit-graph &&
	278	git replace HEAD~1 HEAD~2 &&
	279	git -c core.commitGraph=false log >expect &&
	280	git -c core.commitGraph=true log >actual &&
	281	test_cmp expect actual &&
	282	git commit-graph write --reachable &&
	283	git -c core.commitGraph=false --no-replace-objects log >expect &&
	284	git -c core.commitGraph=true --no-replace-objects log >actual &&
	285	test_cmp expect actual &&
	286	rm -rf .git/objects/info/commit-graph &&
	287	git commit-graph write --reachable &&
	288	test_path_is_file .git/objects/info/commit-graph
	289	)
	290	'
	291
20fd6d57 DS	292	test_expect_success 'commit grafts invalidate commit-graph' '
	293	cd "$TRASH_DIRECTORY" &&
	294	test_when_finished rm -rf graft &&
	295	git clone full graft &&
	296	(
	297	cd graft &&
	298	git commit-graph write --reachable &&
	299	test_path_is_file .git/objects/info/commit-graph &&
	300	H1=$(git rev-parse --verify HEAD~1) &&
	301	H3=$(git rev-parse --verify HEAD~3) &&
	302	echo "$H1 $H3" >.git/info/grafts &&
	303	git -c core.commitGraph=false log >expect &&
	304	git -c core.commitGraph=true log >actual &&
	305	test_cmp expect actual &&
	306	git commit-graph write --reachable &&
	307	git -c core.commitGraph=false --no-replace-objects log >expect &&
	308	git -c core.commitGraph=true --no-replace-objects log >actual &&
	309	test_cmp expect actual &&
	310	rm -rf .git/objects/info/commit-graph &&
	311	git commit-graph write --reachable &&
	312	test_path_is_missing .git/objects/info/commit-graph
	313	)
	314	'
	315
	316	test_expect_success 'replace-objects invalidates commit-graph' '
	317	cd "$TRASH_DIRECTORY" &&
	318	test_when_finished rm -rf shallow &&
	319	git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
	320	(
	321	cd shallow &&
	322	git commit-graph write --reachable &&
	323	test_path_is_missing .git/objects/info/commit-graph &&
	324	git fetch origin --unshallow &&
	325	git commit-graph write --reachable &&
	326	test_path_is_file .git/objects/info/commit-graph
	327	)
	328	'
	329
d9b9f8a6 DS	330	# the verify tests below expect the commit-graph to contain
	331	# exactly the commits reachable from the commits/8 branch.
	332	# If the file changes the set of commits in the list, then the
	333	# offsets into the binary file will result in different edits
	334	# and the tests will likely break.
	335
283e68c7 DS	336	test_expect_success 'git commit-graph verify' '
283e68c7 DS	337	cd "$TRASH_DIRECTORY/full" &&
d9b9f8a6	338	git rev-parse commits/8 \| git commit-graph write --stdin-commits &&
283e68c7 DS	339	git commit-graph verify >output
	340	'
	341
96af91d4	342	NUM_COMMITS=9
437787ae	343	NUM_OCTOPUS_EDGES=2
ae0c89d4	344	HASH_LEN="$(test_oid rawsz)"
d9b9f8a6 DS	345	GRAPH_BYTE_VERSION=4
d9b9f8a6 DS	346	GRAPH_BYTE_HASH=5
2bd0365f DS	347	GRAPH_BYTE_CHUNK_COUNT=6
	348	GRAPH_CHUNK_LOOKUP_OFFSET=8
	349	GRAPH_CHUNK_LOOKUP_WIDTH=12
	350	GRAPH_CHUNK_LOOKUP_ROWS=5
	351	GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
	352	GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
	353	1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
	354	GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
	355	2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
9bda8467 DS	356	GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
	357	$GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
	358	GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
	359	GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
	360	GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
	361	GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
96af91d4	362	GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
2e3c0737 DS	363	GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
2e3c0737 DS	364	GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
53614b13 DS	365	GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
	366	GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
	367	GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
1373e547	368	GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
88968ebf	369	GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
437787ae DS	370	GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
	371	GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
	372	$GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
	373	GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
41df0e30	374	GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
d9b9f8a6	375
f6761faa ÆAB	376	corrupt_graph_setup() {
	377	cd "$TRASH_DIRECTORY/full" &&
	378	test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
	379	cp $objdir/info/commit-graph commit-graph-backup
	380	}
	381
	382	corrupt_graph_verify() {
	383	grepstr=$1
	384	test_must_fail git commit-graph verify 2>test_err &&
	385	grep -v "^+" test_err >err &&
2ac138d5	386	test_i18ngrep "$grepstr" err &&
43d35618 ÆAB	387	if test "$2" != "no-copy"
	388	then
	389	cp $objdir/info/commit-graph commit-graph-pre-write-test
	390	fi &&
	391	git status --short &&
	392	GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD=true git commit-graph write &&
	393	git commit-graph verify
f6761faa ÆAB	394	}
f6761faa ÆAB	395
d2b86fba	396	# usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
d9b9f8a6	397	# Manipulates the commit-graph file at the position
d2b86fba JS	398	# by inserting the data, optionally zeroing the file
d2b86fba JS	399	# starting at <zero_pos>, then runs 'git commit-graph verify'
d9b9f8a6 DS	400	# and places the output in the file 'err'. Test 'err' for
	401	# the given string.
	402	corrupt_graph_and_verify() {
	403	pos=$1
	404	data="${2:-\0}"
	405	grepstr=$3
f6761faa	406	corrupt_graph_setup &&
d2b86fba JS	407	orig_size=$(wc -c < $objdir/info/commit-graph) &&
d2b86fba JS	408	zero_pos=${4:-${orig_size}} &&
d9b9f8a6	409	printf "$data" \| dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
b9cc4056	410	dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
24b451e7	411	generate_zero_bytes $(($orig_size - $zero_pos)) >>"$objdir/info/commit-graph" &&
f6761faa ÆAB	412	corrupt_graph_verify "$grepstr"
f6761faa ÆAB	413
d9b9f8a6 DS	414	}
d9b9f8a6 DS	415
7b8ce9c6 ÆAB	416	test_expect_success POSIXPERM,SANITY 'detect permission problem' '
	417	corrupt_graph_setup &&
	418	chmod 000 $objdir/info/commit-graph &&
43d35618	419	corrupt_graph_verify "Could not open" "no-copy"
7b8ce9c6 ÆAB	420	'
7b8ce9c6 ÆAB	421
945944ca ÆAB	422	test_expect_success 'detect too small' '
	423	corrupt_graph_setup &&
	424	echo "a small graph" >$objdir/info/commit-graph &&
	425	corrupt_graph_verify "too small"
	426	'
	427
d9b9f8a6 DS	428	test_expect_success 'detect bad signature' '
	429	corrupt_graph_and_verify 0 "\0" \
	430	"graph signature"
	431	'
	432
	433	test_expect_success 'detect bad version' '
	434	corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
	435	"graph version"
	436	'
	437
	438	test_expect_success 'detect bad hash version' '
	439	corrupt_graph_and_verify $GRAPH_BYTE_HASH "\02" \
	440	"hash version"
	441	'
	442
2bd0365f DS	443	test_expect_success 'detect low chunk count' '
	444	corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\02" \
	445	"missing the .* chunk"
	446	'
	447
	448	test_expect_success 'detect missing OID fanout chunk' '
	449	corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
	450	"missing the OID Fanout chunk"
	451	'
	452
	453	test_expect_success 'detect missing OID lookup chunk' '
	454	corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
	455	"missing the OID Lookup chunk"
	456	'
	457
	458	test_expect_success 'detect missing commit data chunk' '
	459	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
	460	"missing the Commit Data chunk"
	461	'
	462
9bda8467 DS	463	test_expect_success 'detect incorrect fanout' '
	464	corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
	465	"fanout value"
	466	'
	467
	468	test_expect_success 'detect incorrect fanout final value' '
	469	corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
	470	"fanout value"
	471	'
	472
	473	test_expect_success 'detect incorrect OID order' '
	474	corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
	475	"incorrect OID order"
	476	'
	477
96af91d4 DS	478	test_expect_success 'detect OID not in object database' '
	479	corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
	480	"from object database"
	481	'
	482
2e3c0737 DS	483	test_expect_success 'detect incorrect tree OID' '
	484	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
	485	"root tree OID for commit"
	486	'
	487
53614b13 DS	488	test_expect_success 'detect incorrect parent int-id' '
	489	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
	490	"invalid parent"
	491	'
	492
	493	test_expect_success 'detect extra parent int-id' '
	494	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
	495	"is too long"
	496	'
	497
	498	test_expect_success 'detect wrong parent' '
	499	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
	500	"commit-graph parent for"
	501	'
	502
1373e547 DS	503	test_expect_success 'detect incorrect generation number' '
	504	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
	505	"generation for commit"
	506	'
	507
	508	test_expect_success 'detect incorrect generation number' '
	509	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \
	510	"non-zero generation number"
	511	'
	512
88968ebf DS	513	test_expect_success 'detect incorrect commit date' '
	514	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
	515	"commit date"
	516	'
	517
437787ae DS	518	test_expect_success 'detect incorrect parent for octopus merge' '
	519	corrupt_graph_and_verify $GRAPH_BYTE_OCTOPUS "\01" \
	520	"invalid parent"
	521	'
	522
41df0e30 DS	523	test_expect_success 'detect invalid checksum hash' '
	524	corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
	525	"incorrect checksum"
	526	'
	527
d2b86fba JS	528	test_expect_success 'detect incorrect chunk count' '
	529	corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\377" \
	530	"chunk lookup table entry missing" $GRAPH_CHUNK_LOOKUP_OFFSET
	531	'
	532
e0fd51e1 DS	533	test_expect_success 'git fsck (checks commit-graph)' '
	534	cd "$TRASH_DIRECTORY/full" &&
	535	git fsck &&
	536	corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
	537	"incorrect checksum" &&
43d35618	538	cp commit-graph-pre-write-test $objdir/info/commit-graph &&
e0fd51e1 DS	539	test_must_fail git fsck
	540	'
	541
dade47c0 JT	542	test_expect_success 'setup non-the_repository tests' '
	543	rm -rf repo &&
	544	git init repo &&
	545	test_commit -C repo one &&
	546	test_commit -C repo two &&
	547	git -C repo config core.commitGraph true &&
	548	git -C repo rev-parse two \| \
	549	git -C repo commit-graph write --stdin-commits
	550	'
	551
	552	test_expect_success 'parse_commit_in_graph works for non-the_repository' '
	553	test-tool repository parse_commit_in_graph \
	554	repo/.git repo "$(git -C repo rev-parse two)" >actual &&
3c458630 SG	555	{
	556	git -C repo log --pretty=format:"%ct " -1 &&
	557	git -C repo rev-parse one
	558	} >expect &&
dade47c0 JT	559	test_cmp expect actual &&
	560
	561	test-tool repository parse_commit_in_graph \
	562	repo/.git repo "$(git -C repo rev-parse one)" >actual &&
3c458630	563	git -C repo log --pretty="%ct" -1 one >expect &&
dade47c0 JT	564	test_cmp expect actual
	565	'
	566
	567	test_expect_success 'get_commit_tree_in_graph works for non-the_repository' '
	568	test-tool repository get_commit_tree_in_graph \
	569	repo/.git repo "$(git -C repo rev-parse two)" >actual &&
3c458630	570	git -C repo rev-parse two^{tree} >expect &&
dade47c0 JT	571	test_cmp expect actual &&
	572
	573	test-tool repository get_commit_tree_in_graph \
	574	repo/.git repo "$(git -C repo rev-parse one)" >actual &&
3c458630	575	git -C repo rev-parse one^{tree} >expect &&
dade47c0 JT	576	test_cmp expect actual
	577	'
	578
f237c8b6	579	test_done