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   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 "$TRASH_DIRECTORY/full" &&
   9         git init &&
  10         git config core.commitGraph true &&
  11         objdir=".git/objects" &&
  12         test_oid_init
  13 '
  14
  15 test_expect_success 'verify graph with no graph file' '
  16         cd "$TRASH_DIRECTORY/full" &&
  17         git commit-graph verify
  18 '
  19
  20 test_expect_success 'write graph with no packs' '
  21         cd "$TRASH_DIRECTORY/full" &&
  22         git commit-graph write --object-dir . &&
  23         test_path_is_missing info/commit-graph
  24 '
  25
  26 test_expect_success 'exit with correct error on bad input to --stdin-packs' '
  27         cd "$TRASH_DIRECTORY/full" &&
  28         echo doesnotexist >in &&
  29         test_expect_code 1 git commit-graph write --stdin-packs <in 2>stderr &&
  30         test_i18ngrep "error adding pack" stderr
  31 '
  32
  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
  43 test_expect_success 'exit with correct error on bad input to --stdin-commits' '
  44         cd "$TRASH_DIRECTORY/full" &&
  45         echo HEAD | test_expect_code 1 git commit-graph write --stdin-commits 2>stderr &&
  46         test_i18ngrep "invalid commit object id" stderr &&
  47         # valid tree OID, but not a commit OID
  48         git rev-parse HEAD^{tree} | test_expect_code 1 git commit-graph write --stdin-commits 2>stderr &&
  49         test_i18ngrep "invalid commit object id" stderr
  50 '
  51
  52 graph_git_two_modes() {
  53         git -c core.commitGraph=true $1 >output
  54         git -c core.commitGraph=false $1 >expect
  55         test_cmp expect output
  56 }
  57
  58 graph_git_behavior() {
  59         MSG=$1
  60         DIR=$2
  61         BRANCH=$3
  62         COMPARE=$4
  63         test_expect_success "check normal git operations: $MSG" '
  64                 cd "$TRASH_DIRECTORY/$DIR" &&
  65                 graph_git_two_modes "log --oneline $BRANCH" &&
  66                 graph_git_two_modes "log --topo-order $BRANCH" &&
  67                 graph_git_two_modes "log --graph $COMPARE..$BRANCH" &&
  68                 graph_git_two_modes "branch -vv" &&
  69                 graph_git_two_modes "merge-base -a $BRANCH $COMPARE"
  70         '
  71 }
  72
  73 graph_git_behavior 'no graph' full commits/3 commits/1
  74
  75 graph_read_expect() {
  76         OPTIONAL=""
  77         NUM_CHUNKS=3
  78         if test ! -z $2
  79         then
  80                 OPTIONAL=" $2"
  81                 NUM_CHUNKS=$((3 + $(echo "$2" | wc -w)))
  82         fi
  83         cat >expect <<- EOF
  84         header: 43475048 1 1 $NUM_CHUNKS 0
  85         num_commits: $1
  86         chunks: oid_fanout oid_lookup commit_metadata$OPTIONAL
  87         EOF
  88         git commit-graph read >output &&
  89         test_cmp expect output
  90 }
  91
  92 test_expect_success 'write graph' '
  93         cd "$TRASH_DIRECTORY/full" &&
  94         git commit-graph write &&
  95         test_path_is_file $objdir/info/commit-graph &&
  96         graph_read_expect "3"
  97 '
  98
  99 graph_git_behavior 'graph exists' full commits/3 commits/1
 100
 101 test_expect_success 'Add more commits' '
 102         cd "$TRASH_DIRECTORY/full" &&
 103         git reset --hard commits/1 &&
 104         for i in $(test_seq 4 5)
 105         do
 106                 test_commit $i &&
 107                 git branch commits/$i
 108         done &&
 109         git reset --hard commits/2 &&
 110         for i in $(test_seq 6 7)
 111         do
 112                 test_commit $i &&
 113                 git branch commits/$i
 114         done &&
 115         git reset --hard commits/2 &&
 116         git merge commits/4 &&
 117         git branch merge/1 &&
 118         git reset --hard commits/4 &&
 119         git merge commits/6 &&
 120         git branch merge/2 &&
 121         git reset --hard commits/3 &&
 122         git merge commits/5 commits/7 &&
 123         git branch merge/3 &&
 124         git repack
 125 '
 126
 127 # Current graph structure:
 128 #
 129 #   __M3___
 130 #  /   |   \
 131 # 3 M1 5 M2 7
 132 # |/  \|/  \|
 133 # 2    4    6
 134 # |___/____/
 135 # 1
 136
 137 test_expect_success 'write graph with merges' '
 138         cd "$TRASH_DIRECTORY/full" &&
 139         git commit-graph write &&
 140         test_path_is_file $objdir/info/commit-graph &&
 141         graph_read_expect "10" "extra_edges"
 142 '
 143
 144 graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
 145 graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
 146 graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
 147
 148 test_expect_success 'Add one more commit' '
 149         cd "$TRASH_DIRECTORY/full" &&
 150         test_commit 8 &&
 151         git branch commits/8 &&
 152         ls $objdir/pack | grep idx >existing-idx &&
 153         git repack &&
 154         ls $objdir/pack| grep idx | grep -v -f existing-idx >new-idx
 155 '
 156
 157 # Current graph structure:
 158 #
 159 #      8
 160 #      |
 161 #   __M3___
 162 #  /   |   \
 163 # 3 M1 5 M2 7
 164 # |/  \|/  \|
 165 # 2    4    6
 166 # |___/____/
 167 # 1
 168
 169 graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
 170 graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
 171
 172 test_expect_success 'write graph with new commit' '
 173         cd "$TRASH_DIRECTORY/full" &&
 174         git commit-graph write &&
 175         test_path_is_file $objdir/info/commit-graph &&
 176         graph_read_expect "11" "extra_edges"
 177 '
 178
 179 graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
 180 graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
 181
 182 test_expect_success 'write graph with nothing new' '
 183         cd "$TRASH_DIRECTORY/full" &&
 184         git commit-graph write &&
 185         test_path_is_file $objdir/info/commit-graph &&
 186         graph_read_expect "11" "extra_edges"
 187 '
 188
 189 graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
 190 graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
 191
 192 test_expect_success 'build graph from latest pack with closure' '
 193         cd "$TRASH_DIRECTORY/full" &&
 194         cat new-idx | git commit-graph write --stdin-packs &&
 195         test_path_is_file $objdir/info/commit-graph &&
 196         graph_read_expect "9" "extra_edges"
 197 '
 198
 199 graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
 200 graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
 201
 202 test_expect_success 'build graph from commits with closure' '
 203         cd "$TRASH_DIRECTORY/full" &&
 204         git tag -a -m "merge" tag/merge merge/2 &&
 205         git rev-parse tag/merge >commits-in &&
 206         git rev-parse merge/1 >>commits-in &&
 207         cat commits-in | git commit-graph write --stdin-commits &&
 208         test_path_is_file $objdir/info/commit-graph &&
 209         graph_read_expect "6"
 210 '
 211
 212 graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
 213 graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
 214
 215 test_expect_success 'build graph from commits with append' '
 216         cd "$TRASH_DIRECTORY/full" &&
 217         git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
 218         test_path_is_file $objdir/info/commit-graph &&
 219         graph_read_expect "10" "extra_edges"
 220 '
 221
 222 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 223 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 224
 225 test_expect_success 'build graph using --reachable' '
 226         cd "$TRASH_DIRECTORY/full" &&
 227         git commit-graph write --reachable &&
 228         test_path_is_file $objdir/info/commit-graph &&
 229         graph_read_expect "11" "extra_edges"
 230 '
 231
 232 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 233 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 234
 235 test_expect_success 'setup bare repo' '
 236         cd "$TRASH_DIRECTORY" &&
 237         git clone --bare --no-local full bare &&
 238         cd bare &&
 239         git config core.commitGraph true &&
 240         baredir="./objects"
 241 '
 242
 243 graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
 244 graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2
 245
 246 test_expect_success 'write graph in bare repo' '
 247         cd "$TRASH_DIRECTORY/bare" &&
 248         git commit-graph write &&
 249         test_path_is_file $baredir/info/commit-graph &&
 250         graph_read_expect "11" "extra_edges"
 251 '
 252
 253 graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
 254 graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
 255
 256 test_expect_success 'perform fast-forward merge in full repo' '
 257         cd "$TRASH_DIRECTORY/full" &&
 258         git checkout -b merge-5-to-8 commits/5 &&
 259         git merge commits/8 &&
 260         git show-ref -s merge-5-to-8 >output &&
 261         git show-ref -s commits/8 >expect &&
 262         test_cmp expect output
 263 '
 264
 265 test_expect_success 'check that gc computes commit-graph' '
 266         cd "$TRASH_DIRECTORY/full" &&
 267         git commit --allow-empty -m "blank" &&
 268         git commit-graph write --reachable &&
 269         cp $objdir/info/commit-graph commit-graph-before-gc &&
 270         git reset --hard HEAD~1 &&
 271         git config gc.writeCommitGraph true &&
 272         git gc &&
 273         cp $objdir/info/commit-graph commit-graph-after-gc &&
 274         ! test_cmp_bin commit-graph-before-gc commit-graph-after-gc &&
 275         git commit-graph write --reachable &&
 276         test_cmp_bin commit-graph-after-gc $objdir/info/commit-graph
 277 '
 278
 279 test_expect_success 'replace-objects invalidates commit-graph' '
 280         cd "$TRASH_DIRECTORY" &&
 281         test_when_finished rm -rf replace &&
 282         git clone full replace &&
 283         (
 284                 cd replace &&
 285                 git commit-graph write --reachable &&
 286                 test_path_is_file .git/objects/info/commit-graph &&
 287                 git replace HEAD~1 HEAD~2 &&
 288                 git -c core.commitGraph=false log >expect &&
 289                 git -c core.commitGraph=true log >actual &&
 290                 test_cmp expect actual &&
 291                 git commit-graph write --reachable &&
 292                 git -c core.commitGraph=false --no-replace-objects log >expect &&
 293                 git -c core.commitGraph=true --no-replace-objects log >actual &&
 294                 test_cmp expect actual &&
 295                 rm -rf .git/objects/info/commit-graph &&
 296                 git commit-graph write --reachable &&
 297                 test_path_is_file .git/objects/info/commit-graph
 298         )
 299 '
 300
 301 test_expect_success 'commit grafts invalidate commit-graph' '
 302         cd "$TRASH_DIRECTORY" &&
 303         test_when_finished rm -rf graft &&
 304         git clone full graft &&
 305         (
 306                 cd graft &&
 307                 git commit-graph write --reachable &&
 308                 test_path_is_file .git/objects/info/commit-graph &&
 309                 H1=$(git rev-parse --verify HEAD~1) &&
 310                 H3=$(git rev-parse --verify HEAD~3) &&
 311                 echo "$H1 $H3" >.git/info/grafts &&
 312                 git -c core.commitGraph=false log >expect &&
 313                 git -c core.commitGraph=true log >actual &&
 314                 test_cmp expect actual &&
 315                 git commit-graph write --reachable &&
 316                 git -c core.commitGraph=false --no-replace-objects log >expect &&
 317                 git -c core.commitGraph=true --no-replace-objects log >actual &&
 318                 test_cmp expect actual &&
 319                 rm -rf .git/objects/info/commit-graph &&
 320                 git commit-graph write --reachable &&
 321                 test_path_is_missing .git/objects/info/commit-graph
 322         )
 323 '
 324
 325 test_expect_success 'replace-objects invalidates commit-graph' '
 326         cd "$TRASH_DIRECTORY" &&
 327         test_when_finished rm -rf shallow &&
 328         git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
 329         (
 330                 cd shallow &&
 331                 git commit-graph write --reachable &&
 332                 test_path_is_missing .git/objects/info/commit-graph &&
 333                 git fetch origin --unshallow &&
 334                 git commit-graph write --reachable &&
 335                 test_path_is_file .git/objects/info/commit-graph
 336         )
 337 '
 338
 339 # the verify tests below expect the commit-graph to contain
 340 # exactly the commits reachable from the commits/8 branch.
 341 # If the file changes the set of commits in the list, then the
 342 # offsets into the binary file will result in different edits
 343 # and the tests will likely break.
 344
 345 test_expect_success 'git commit-graph verify' '
 346         cd "$TRASH_DIRECTORY/full" &&
 347         git rev-parse commits/8 | git commit-graph write --stdin-commits &&
 348         git commit-graph verify >output
 349 '
 350
 351 NUM_COMMITS=9
 352 NUM_OCTOPUS_EDGES=2
 353 HASH_LEN="$(test_oid rawsz)"
 354 GRAPH_BYTE_VERSION=4
 355 GRAPH_BYTE_HASH=5
 356 GRAPH_BYTE_CHUNK_COUNT=6
 357 GRAPH_CHUNK_LOOKUP_OFFSET=8
 358 GRAPH_CHUNK_LOOKUP_WIDTH=12
 359 GRAPH_CHUNK_LOOKUP_ROWS=5
 360 GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
 361 GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 362                             1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 363 GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 364                              2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 365 GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 366                        $GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
 367 GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
 368 GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
 369 GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
 370 GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
 371 GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
 372 GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
 373 GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
 374 GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
 375 GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
 376 GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
 377 GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
 378 GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
 379 GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
 380 GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
 381                              $GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
 382 GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
 383 GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
 384
 385 corrupt_graph_setup() {
 386         cd "$TRASH_DIRECTORY/full" &&
 387         test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
 388         cp $objdir/info/commit-graph commit-graph-backup
 389 }
 390
 391 corrupt_graph_verify() {
 392         grepstr=$1
 393         test_must_fail git commit-graph verify 2>test_err &&
 394         grep -v "^+" test_err >err &&
 395         test_i18ngrep "$grepstr" err &&
 396         if test "$2" != "no-copy"
 397         then
 398                 cp $objdir/info/commit-graph commit-graph-pre-write-test
 399         fi &&
 400         git status --short &&
 401         GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD=true git commit-graph write &&
 402         git commit-graph verify
 403 }
 404
 405 # usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
 406 # Manipulates the commit-graph file at the position
 407 # by inserting the data, optionally zeroing the file
 408 # starting at <zero_pos>, then runs 'git commit-graph verify'
 409 # and places the output in the file 'err'. Test 'err' for
 410 # the given string.
 411 corrupt_graph_and_verify() {
 412         pos=$1
 413         data="${2:-\0}"
 414         grepstr=$3
 415         corrupt_graph_setup &&
 416         orig_size=$(wc -c < $objdir/info/commit-graph) &&
 417         zero_pos=${4:-${orig_size}} &&
 418         printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
 419         dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
 420         generate_zero_bytes $(($orig_size - $zero_pos)) >>"$objdir/info/commit-graph" &&
 421         corrupt_graph_verify "$grepstr"
 422
 423 }
 424
 425 test_expect_success POSIXPERM,SANITY 'detect permission problem' '
 426         corrupt_graph_setup &&
 427         chmod 000 $objdir/info/commit-graph &&
 428         corrupt_graph_verify "Could not open" "no-copy"
 429 '
 430
 431 test_expect_success 'detect too small' '
 432         corrupt_graph_setup &&
 433         echo "a small graph" >$objdir/info/commit-graph &&
 434         corrupt_graph_verify "too small"
 435 '
 436
 437 test_expect_success 'detect bad signature' '
 438         corrupt_graph_and_verify 0 "\0" \
 439                 "graph signature"
 440 '
 441
 442 test_expect_success 'detect bad version' '
 443         corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
 444                 "graph version"
 445 '
 446
 447 test_expect_success 'detect bad hash version' '
 448         corrupt_graph_and_verify $GRAPH_BYTE_HASH "\02" \
 449                 "hash version"
 450 '
 451
 452 test_expect_success 'detect low chunk count' '
 453         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\02" \
 454                 "missing the .* chunk"
 455 '
 456
 457 test_expect_success 'detect missing OID fanout chunk' '
 458         corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
 459                 "missing the OID Fanout chunk"
 460 '
 461
 462 test_expect_success 'detect missing OID lookup chunk' '
 463         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
 464                 "missing the OID Lookup chunk"
 465 '
 466
 467 test_expect_success 'detect missing commit data chunk' '
 468         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
 469                 "missing the Commit Data chunk"
 470 '
 471
 472 test_expect_success 'detect incorrect fanout' '
 473         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
 474                 "fanout value"
 475 '
 476
 477 test_expect_success 'detect incorrect fanout final value' '
 478         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
 479                 "fanout value"
 480 '
 481
 482 test_expect_success 'detect incorrect OID order' '
 483         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
 484                 "incorrect OID order"
 485 '
 486
 487 test_expect_success 'detect OID not in object database' '
 488         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
 489                 "from object database"
 490 '
 491
 492 test_expect_success 'detect incorrect tree OID' '
 493         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
 494                 "root tree OID for commit"
 495 '
 496
 497 test_expect_success 'detect incorrect parent int-id' '
 498         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
 499                 "invalid parent"
 500 '
 501
 502 test_expect_success 'detect extra parent int-id' '
 503         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
 504                 "is too long"
 505 '
 506
 507 test_expect_success 'detect wrong parent' '
 508         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
 509                 "commit-graph parent for"
 510 '
 511
 512 test_expect_success 'detect incorrect generation number' '
 513         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
 514                 "generation for commit"
 515 '
 516
 517 test_expect_success 'detect incorrect generation number' '
 518         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \
 519                 "non-zero generation number"
 520 '
 521
 522 test_expect_success 'detect incorrect commit date' '
 523         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
 524                 "commit date"
 525 '
 526
 527 test_expect_success 'detect incorrect parent for octopus merge' '
 528         corrupt_graph_and_verify $GRAPH_BYTE_OCTOPUS "\01" \
 529                 "invalid parent"
 530 '
 531
 532 test_expect_success 'detect invalid checksum hash' '
 533         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 534                 "incorrect checksum"
 535 '
 536
 537 test_expect_success 'detect incorrect chunk count' '
 538         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\377" \
 539                 "chunk lookup table entry missing" $GRAPH_CHUNK_LOOKUP_OFFSET
 540 '
 541
 542 test_expect_success 'git fsck (checks commit-graph)' '
 543         cd "$TRASH_DIRECTORY/full" &&
 544         git fsck &&
 545         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 546                 "incorrect checksum" &&
 547         cp commit-graph-pre-write-test $objdir/info/commit-graph &&
 548         test_must_fail git fsck
 549 '
 550
 551 test_expect_success 'setup non-the_repository tests' '
 552         rm -rf repo &&
 553         git init repo &&
 554         test_commit -C repo one &&
 555         test_commit -C repo two &&
 556         git -C repo config core.commitGraph true &&
 557         git -C repo rev-parse two | \
 558                 git -C repo commit-graph write --stdin-commits
 559 '
 560
 561 test_expect_success 'parse_commit_in_graph works for non-the_repository' '
 562         test-tool repository parse_commit_in_graph \
 563                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
 564         {
 565                 git -C repo log --pretty=format:"%ct " -1 &&
 566                 git -C repo rev-parse one
 567         } >expect &&
 568         test_cmp expect actual &&
 569
 570         test-tool repository parse_commit_in_graph \
 571                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
 572         git -C repo log --pretty="%ct" -1 one >expect &&
 573         test_cmp expect actual
 574 '
 575
 576 test_expect_success 'get_commit_tree_in_graph works for non-the_repository' '
 577         test-tool repository get_commit_tree_in_graph \
 578                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
 579         git -C repo rev-parse two^{tree} >expect &&
 580         test_cmp expect actual &&
 581
 582         test-tool repository get_commit_tree_in_graph \
 583                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
 584         git -C repo rev-parse one^{tree} >expect &&
 585         test_cmp expect actual
 586 '
 587
 588 test_done