[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 "$TRASH_DIRECTORY/full" &&
	echo doesnotexist >in &&
	{ git commit-graph write --stdin-packs <in 2>stderr; ret=$?; } &&
	test "$ret" = 1 &&
	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 &&
	29	{ git commit-graph write --stdin-packs <in 2>stderr; ret=$?; } &&
	30	test "$ret" = 1 &&
	31	test_i18ngrep "error adding pack" stderr
	32	'
	33
f237c8b6 DS	34	test_expect_success 'create commits and repack' '
	35	cd "$TRASH_DIRECTORY/full" &&
	36	for i in $(test_seq 3)
	37	do
	38	test_commit $i &&
	39	git branch commits/$i
	40	done &&
	41	git repack
	42	'
	43
177722b3	44	graph_git_two_modes() {
55abcb41 DS	45	git -c core.commitGraph=true $1 >output
55abcb41 DS	46	git -c core.commitGraph=false $1 >expect
dcbaa0b3	47	test_cmp expect output
177722b3 DS	48	}
	49
	50	graph_git_behavior() {
	51	MSG=$1
	52	DIR=$2
	53	BRANCH=$3
	54	COMPARE=$4
	55	test_expect_success "check normal git operations: $MSG" '
	56	cd "$TRASH_DIRECTORY/$DIR" &&
	57	graph_git_two_modes "log --oneline $BRANCH" &&
	58	graph_git_two_modes "log --topo-order $BRANCH" &&
	59	graph_git_two_modes "log --graph $COMPARE..$BRANCH" &&
	60	graph_git_two_modes "branch -vv" &&
	61	graph_git_two_modes "merge-base -a $BRANCH $COMPARE"
	62	'
	63	}
	64
	65	graph_git_behavior 'no graph' full commits/3 commits/1
	66
2a2e32bd DS	67	graph_read_expect() {
	68	OPTIONAL=""
	69	NUM_CHUNKS=3
	70	if test ! -z $2
	71	then
	72	OPTIONAL=" $2"
	73	NUM_CHUNKS=$((3 + $(echo "$2" \| wc -w)))
	74	fi
	75	cat >expect <<- EOF
	76	header: 43475048 1 1 $NUM_CHUNKS 0
	77	num_commits: $1
	78	chunks: oid_fanout oid_lookup commit_metadata$OPTIONAL
	79	EOF
	80	git commit-graph read >output &&
	81	test_cmp expect output
	82	}
	83
f237c8b6 DS	84	test_expect_success 'write graph' '
f237c8b6 DS	85	cd "$TRASH_DIRECTORY/full" &&
0b918b75	86	git commit-graph write &&
2a2e32bd DS	87	test_path_is_file $objdir/info/commit-graph &&
2a2e32bd DS	88	graph_read_expect "3"
f237c8b6 DS	89	'
f237c8b6 DS	90
177722b3 DS	91	graph_git_behavior 'graph exists' full commits/3 commits/1
177722b3 DS	92
f237c8b6 DS	93	test_expect_success 'Add more commits' '
	94	cd "$TRASH_DIRECTORY/full" &&
	95	git reset --hard commits/1 &&
	96	for i in $(test_seq 4 5)
	97	do
	98	test_commit $i &&
	99	git branch commits/$i
	100	done &&
	101	git reset --hard commits/2 &&
	102	for i in $(test_seq 6 7)
	103	do
	104	test_commit $i &&
	105	git branch commits/$i
	106	done &&
	107	git reset --hard commits/2 &&
	108	git merge commits/4 &&
	109	git branch merge/1 &&
	110	git reset --hard commits/4 &&
	111	git merge commits/6 &&
	112	git branch merge/2 &&
	113	git reset --hard commits/3 &&
	114	git merge commits/5 commits/7 &&
	115	git branch merge/3 &&
	116	git repack
	117	'
	118
	119	# Current graph structure:
	120	#
	121	# __M3___
	122	# / \| \
	123	# 3 M1 5 M2 7
	124	# \|/ \\|/ \\|
	125	# 2 4 6
	126	# \|___/____/
	127	# 1
	128
f237c8b6 DS	129	test_expect_success 'write graph with merges' '
	130	cd "$TRASH_DIRECTORY/full" &&
	131	git commit-graph write &&
2a2e32bd	132	test_path_is_file $objdir/info/commit-graph &&
5af7417b	133	graph_read_expect "10" "extra_edges"
f237c8b6 DS	134	'
f237c8b6 DS	135
177722b3 DS	136	graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
	137	graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
	138	graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
	139
f237c8b6 DS	140	test_expect_success 'Add one more commit' '
	141	cd "$TRASH_DIRECTORY/full" &&
	142	test_commit 8 &&
	143	git branch commits/8 &&
	144	ls $objdir/pack \| grep idx >existing-idx &&
	145	git repack &&
4a3ed638	146	ls $objdir/pack\| grep idx \| grep -v -f existing-idx >new-idx
f237c8b6 DS	147	'
	148
	149	# Current graph structure:
	150	#
	151	# 8
	152	# \|
	153	# __M3___
	154	# / \| \
	155	# 3 M1 5 M2 7
	156	# \|/ \\|/ \\|
	157	# 2 4 6
	158	# \|___/____/
	159	# 1
	160
177722b3 DS	161	graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
	162	graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
	163
f237c8b6 DS	164	test_expect_success 'write graph with new commit' '
	165	cd "$TRASH_DIRECTORY/full" &&
	166	git commit-graph write &&
2a2e32bd	167	test_path_is_file $objdir/info/commit-graph &&
5af7417b	168	graph_read_expect "11" "extra_edges"
f237c8b6 DS	169	'
f237c8b6 DS	170
177722b3 DS	171	graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
	172	graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
	173
f237c8b6 DS	174	test_expect_success 'write graph with nothing new' '
	175	cd "$TRASH_DIRECTORY/full" &&
	176	git commit-graph write &&
2a2e32bd	177	test_path_is_file $objdir/info/commit-graph &&
5af7417b	178	graph_read_expect "11" "extra_edges"
f237c8b6 DS	179	'
f237c8b6 DS	180
177722b3 DS	181	graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
	182	graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
	183
049d51a2 DS	184	test_expect_success 'build graph from latest pack with closure' '
	185	cd "$TRASH_DIRECTORY/full" &&
	186	cat new-idx \| git commit-graph write --stdin-packs &&
	187	test_path_is_file $objdir/info/commit-graph &&
5af7417b	188	graph_read_expect "9" "extra_edges"
049d51a2 DS	189	'
	190
	191	graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
	192	graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
	193
3d5df01b DS	194	test_expect_success 'build graph from commits with closure' '
	195	cd "$TRASH_DIRECTORY/full" &&
	196	git tag -a -m "merge" tag/merge merge/2 &&
	197	git rev-parse tag/merge >commits-in &&
	198	git rev-parse merge/1 >>commits-in &&
	199	cat commits-in \| git commit-graph write --stdin-commits &&
	200	test_path_is_file $objdir/info/commit-graph &&
	201	graph_read_expect "6"
	202	'
	203
	204	graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
	205	graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
	206
7547b95b DS	207	test_expect_success 'build graph from commits with append' '
	208	cd "$TRASH_DIRECTORY/full" &&
	209	git rev-parse merge/3 \| git commit-graph write --stdin-commits --append &&
	210	test_path_is_file $objdir/info/commit-graph &&
5af7417b	211	graph_read_expect "10" "extra_edges"
7547b95b DS	212	'
	213
	214	graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
	215	graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
	216
59fb8770 DS	217	test_expect_success 'build graph using --reachable' '
	218	cd "$TRASH_DIRECTORY/full" &&
	219	git commit-graph write --reachable &&
	220	test_path_is_file $objdir/info/commit-graph &&
5af7417b	221	graph_read_expect "11" "extra_edges"
59fb8770 DS	222	'
	223
	224	graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
	225	graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
	226
f237c8b6 DS	227	test_expect_success 'setup bare repo' '
	228	cd "$TRASH_DIRECTORY" &&
	229	git clone --bare --no-local full bare &&
	230	cd bare &&
177722b3	231	git config core.commitGraph true &&
f237c8b6 DS	232	baredir="./objects"
	233	'
	234
177722b3 DS	235	graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
	236	graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2
	237
f237c8b6 DS	238	test_expect_success 'write graph in bare repo' '
	239	cd "$TRASH_DIRECTORY/bare" &&
	240	git commit-graph write &&
2a2e32bd	241	test_path_is_file $baredir/info/commit-graph &&
5af7417b	242	graph_read_expect "11" "extra_edges"
f237c8b6 DS	243	'
f237c8b6 DS	244
177722b3 DS	245	graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
	246	graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
	247
7adf5266 DS	248	test_expect_success 'perform fast-forward merge in full repo' '
	249	cd "$TRASH_DIRECTORY/full" &&
	250	git checkout -b merge-5-to-8 commits/5 &&
	251	git merge commits/8 &&
	252	git show-ref -s merge-5-to-8 >output &&
	253	git show-ref -s commits/8 >expect &&
	254	test_cmp expect output
	255	'
	256
d5d5d7b6 DS	257	test_expect_success 'check that gc computes commit-graph' '
	258	cd "$TRASH_DIRECTORY/full" &&
	259	git commit --allow-empty -m "blank" &&
	260	git commit-graph write --reachable &&
	261	cp $objdir/info/commit-graph commit-graph-before-gc &&
	262	git reset --hard HEAD~1 &&
	263	git config gc.writeCommitGraph true &&
	264	git gc &&
	265	cp $objdir/info/commit-graph commit-graph-after-gc &&
eb7cc5bc	266	! test_cmp_bin commit-graph-before-gc commit-graph-after-gc &&
d5d5d7b6	267	git commit-graph write --reachable &&
eb7cc5bc	268	test_cmp_bin commit-graph-after-gc $objdir/info/commit-graph
d5d5d7b6 DS	269	'
d5d5d7b6 DS	270
d6538246 DS	271	test_expect_success 'replace-objects invalidates commit-graph' '
	272	cd "$TRASH_DIRECTORY" &&
	273	test_when_finished rm -rf replace &&
	274	git clone full replace &&
	275	(
	276	cd replace &&
	277	git commit-graph write --reachable &&
	278	test_path_is_file .git/objects/info/commit-graph &&
	279	git replace HEAD~1 HEAD~2 &&
	280	git -c core.commitGraph=false log >expect &&
	281	git -c core.commitGraph=true log >actual &&
	282	test_cmp expect actual &&
	283	git commit-graph write --reachable &&
	284	git -c core.commitGraph=false --no-replace-objects log >expect &&
	285	git -c core.commitGraph=true --no-replace-objects log >actual &&
	286	test_cmp expect actual &&
	287	rm -rf .git/objects/info/commit-graph &&
	288	git commit-graph write --reachable &&
	289	test_path_is_file .git/objects/info/commit-graph
	290	)
	291	'
	292
20fd6d57 DS	293	test_expect_success 'commit grafts invalidate commit-graph' '
	294	cd "$TRASH_DIRECTORY" &&
	295	test_when_finished rm -rf graft &&
	296	git clone full graft &&
	297	(
	298	cd graft &&
	299	git commit-graph write --reachable &&
	300	test_path_is_file .git/objects/info/commit-graph &&
	301	H1=$(git rev-parse --verify HEAD~1) &&
	302	H3=$(git rev-parse --verify HEAD~3) &&
	303	echo "$H1 $H3" >.git/info/grafts &&
	304	git -c core.commitGraph=false log >expect &&
	305	git -c core.commitGraph=true log >actual &&
	306	test_cmp expect actual &&
	307	git commit-graph write --reachable &&
	308	git -c core.commitGraph=false --no-replace-objects log >expect &&
	309	git -c core.commitGraph=true --no-replace-objects log >actual &&
	310	test_cmp expect actual &&
	311	rm -rf .git/objects/info/commit-graph &&
	312	git commit-graph write --reachable &&
	313	test_path_is_missing .git/objects/info/commit-graph
	314	)
	315	'
	316
	317	test_expect_success 'replace-objects invalidates commit-graph' '
	318	cd "$TRASH_DIRECTORY" &&
	319	test_when_finished rm -rf shallow &&
	320	git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
	321	(
	322	cd shallow &&
	323	git commit-graph write --reachable &&
	324	test_path_is_missing .git/objects/info/commit-graph &&
	325	git fetch origin --unshallow &&
	326	git commit-graph write --reachable &&
	327	test_path_is_file .git/objects/info/commit-graph
	328	)
	329	'
	330
d9b9f8a6 DS	331	# the verify tests below expect the commit-graph to contain
	332	# exactly the commits reachable from the commits/8 branch.
	333	# If the file changes the set of commits in the list, then the
	334	# offsets into the binary file will result in different edits
	335	# and the tests will likely break.
	336
283e68c7 DS	337	test_expect_success 'git commit-graph verify' '
283e68c7 DS	338	cd "$TRASH_DIRECTORY/full" &&
d9b9f8a6	339	git rev-parse commits/8 \| git commit-graph write --stdin-commits &&
283e68c7 DS	340	git commit-graph verify >output
	341	'
	342
96af91d4	343	NUM_COMMITS=9
437787ae	344	NUM_OCTOPUS_EDGES=2
ae0c89d4	345	HASH_LEN="$(test_oid rawsz)"
d9b9f8a6 DS	346	GRAPH_BYTE_VERSION=4
d9b9f8a6 DS	347	GRAPH_BYTE_HASH=5
2bd0365f DS	348	GRAPH_BYTE_CHUNK_COUNT=6
	349	GRAPH_CHUNK_LOOKUP_OFFSET=8
	350	GRAPH_CHUNK_LOOKUP_WIDTH=12
	351	GRAPH_CHUNK_LOOKUP_ROWS=5
	352	GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
	353	GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
	354	1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
	355	GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
	356	2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
9bda8467 DS	357	GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
	358	$GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
	359	GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
	360	GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
	361	GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
	362	GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
96af91d4	363	GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
2e3c0737 DS	364	GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
2e3c0737 DS	365	GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
53614b13 DS	366	GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
	367	GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
	368	GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
1373e547	369	GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
88968ebf	370	GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
437787ae DS	371	GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
	372	GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
	373	$GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
	374	GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
41df0e30	375	GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
d9b9f8a6	376
f6761faa ÆAB	377	corrupt_graph_setup() {
	378	cd "$TRASH_DIRECTORY/full" &&
	379	test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
	380	cp $objdir/info/commit-graph commit-graph-backup
	381	}
	382
	383	corrupt_graph_verify() {
	384	grepstr=$1
	385	test_must_fail git commit-graph verify 2>test_err &&
	386	grep -v "^+" test_err >err &&
2ac138d5	387	test_i18ngrep "$grepstr" err &&
43d35618 ÆAB	388	if test "$2" != "no-copy"
	389	then
	390	cp $objdir/info/commit-graph commit-graph-pre-write-test
	391	fi &&
	392	git status --short &&
	393	GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD=true git commit-graph write &&
	394	git commit-graph verify
f6761faa ÆAB	395	}
f6761faa ÆAB	396
d2b86fba	397	# usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
d9b9f8a6	398	# Manipulates the commit-graph file at the position
d2b86fba JS	399	# by inserting the data, optionally zeroing the file
d2b86fba JS	400	# starting at <zero_pos>, then runs 'git commit-graph verify'
d9b9f8a6 DS	401	# and places the output in the file 'err'. Test 'err' for
	402	# the given string.
	403	corrupt_graph_and_verify() {
	404	pos=$1
	405	data="${2:-\0}"
	406	grepstr=$3
f6761faa	407	corrupt_graph_setup &&
d2b86fba JS	408	orig_size=$(wc -c < $objdir/info/commit-graph) &&
d2b86fba JS	409	zero_pos=${4:-${orig_size}} &&
d9b9f8a6	410	printf "$data" \| dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
b9cc4056	411	dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
24b451e7	412	generate_zero_bytes $(($orig_size - $zero_pos)) >>"$objdir/info/commit-graph" &&
f6761faa ÆAB	413	corrupt_graph_verify "$grepstr"
f6761faa ÆAB	414
d9b9f8a6 DS	415	}
d9b9f8a6 DS	416
7b8ce9c6 ÆAB	417	test_expect_success POSIXPERM,SANITY 'detect permission problem' '
	418	corrupt_graph_setup &&
	419	chmod 000 $objdir/info/commit-graph &&
43d35618	420	corrupt_graph_verify "Could not open" "no-copy"
7b8ce9c6 ÆAB	421	'
7b8ce9c6 ÆAB	422
945944ca ÆAB	423	test_expect_success 'detect too small' '
	424	corrupt_graph_setup &&
	425	echo "a small graph" >$objdir/info/commit-graph &&
	426	corrupt_graph_verify "too small"
	427	'
	428
d9b9f8a6 DS	429	test_expect_success 'detect bad signature' '
	430	corrupt_graph_and_verify 0 "\0" \
	431	"graph signature"
	432	'
	433
	434	test_expect_success 'detect bad version' '
	435	corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
	436	"graph version"
	437	'
	438
	439	test_expect_success 'detect bad hash version' '
	440	corrupt_graph_and_verify $GRAPH_BYTE_HASH "\02" \
	441	"hash version"
	442	'
	443
2bd0365f DS	444	test_expect_success 'detect low chunk count' '
	445	corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\02" \
	446	"missing the .* chunk"
	447	'
	448
	449	test_expect_success 'detect missing OID fanout chunk' '
	450	corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
	451	"missing the OID Fanout chunk"
	452	'
	453
	454	test_expect_success 'detect missing OID lookup chunk' '
	455	corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
	456	"missing the OID Lookup chunk"
	457	'
	458
	459	test_expect_success 'detect missing commit data chunk' '
	460	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
	461	"missing the Commit Data chunk"
	462	'
	463
9bda8467 DS	464	test_expect_success 'detect incorrect fanout' '
	465	corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
	466	"fanout value"
	467	'
	468
	469	test_expect_success 'detect incorrect fanout final value' '
	470	corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
	471	"fanout value"
	472	'
	473
	474	test_expect_success 'detect incorrect OID order' '
	475	corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
	476	"incorrect OID order"
	477	'
	478
96af91d4 DS	479	test_expect_success 'detect OID not in object database' '
	480	corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
	481	"from object database"
	482	'
	483
2e3c0737 DS	484	test_expect_success 'detect incorrect tree OID' '
	485	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
	486	"root tree OID for commit"
	487	'
	488
53614b13 DS	489	test_expect_success 'detect incorrect parent int-id' '
	490	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
	491	"invalid parent"
	492	'
	493
	494	test_expect_success 'detect extra parent int-id' '
	495	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
	496	"is too long"
	497	'
	498
	499	test_expect_success 'detect wrong parent' '
	500	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
	501	"commit-graph parent for"
	502	'
	503
1373e547 DS	504	test_expect_success 'detect incorrect generation number' '
	505	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
	506	"generation for commit"
	507	'
	508
	509	test_expect_success 'detect incorrect generation number' '
	510	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \
	511	"non-zero generation number"
	512	'
	513
88968ebf DS	514	test_expect_success 'detect incorrect commit date' '
	515	corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
	516	"commit date"
	517	'
	518
437787ae DS	519	test_expect_success 'detect incorrect parent for octopus merge' '
	520	corrupt_graph_and_verify $GRAPH_BYTE_OCTOPUS "\01" \
	521	"invalid parent"
	522	'
	523
41df0e30 DS	524	test_expect_success 'detect invalid checksum hash' '
	525	corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
	526	"incorrect checksum"
	527	'
	528
d2b86fba JS	529	test_expect_success 'detect incorrect chunk count' '
	530	corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\377" \
	531	"chunk lookup table entry missing" $GRAPH_CHUNK_LOOKUP_OFFSET
	532	'
	533
e0fd51e1 DS	534	test_expect_success 'git fsck (checks commit-graph)' '
	535	cd "$TRASH_DIRECTORY/full" &&
	536	git fsck &&
	537	corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
	538	"incorrect checksum" &&
43d35618	539	cp commit-graph-pre-write-test $objdir/info/commit-graph &&
e0fd51e1 DS	540	test_must_fail git fsck
	541	'
	542
dade47c0 JT	543	test_expect_success 'setup non-the_repository tests' '
	544	rm -rf repo &&
	545	git init repo &&
	546	test_commit -C repo one &&
	547	test_commit -C repo two &&
	548	git -C repo config core.commitGraph true &&
	549	git -C repo rev-parse two \| \
	550	git -C repo commit-graph write --stdin-commits
	551	'
	552
	553	test_expect_success 'parse_commit_in_graph works for non-the_repository' '
	554	test-tool repository parse_commit_in_graph \
	555	repo/.git repo "$(git -C repo rev-parse two)" >actual &&
3c458630 SG	556	{
	557	git -C repo log --pretty=format:"%ct " -1 &&
	558	git -C repo rev-parse one
	559	} >expect &&
dade47c0 JT	560	test_cmp expect actual &&
	561
	562	test-tool repository parse_commit_in_graph \
	563	repo/.git repo "$(git -C repo rev-parse one)" >actual &&
3c458630	564	git -C repo log --pretty="%ct" -1 one >expect &&
dade47c0 JT	565	test_cmp expect actual
	566	'
	567
	568	test_expect_success 'get_commit_tree_in_graph works for non-the_repository' '
	569	test-tool repository get_commit_tree_in_graph \
	570	repo/.git repo "$(git -C repo rev-parse two)" >actual &&
3c458630	571	git -C repo rev-parse two^{tree} >expect &&
dade47c0 JT	572	test_cmp expect actual &&
	573
	574	test-tool repository get_commit_tree_in_graph \
	575	repo/.git repo "$(git -C repo rev-parse one)" >actual &&
3c458630	576	git -C repo rev-parse one^{tree} >expect &&
dade47c0 JT	577	test_cmp expect actual
	578	'
	579
f237c8b6	580	test_done