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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         test-tool read-graph >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 test_expect_success 'commit-graph write progress off for redirected stderr' '
 128         cd "$TRASH_DIRECTORY/full" &&
 129         git commit-graph write 2>err &&
 130         test_line_count = 0 err
 131 '
 132
 133 test_expect_success 'commit-graph write force progress on for stderr' '
 134         cd "$TRASH_DIRECTORY/full" &&
 135         GIT_PROGRESS_DELAY=0 git commit-graph write --progress 2>err &&
 136         test_file_not_empty err
 137 '
 138
 139 test_expect_success 'commit-graph write with the --no-progress option' '
 140         cd "$TRASH_DIRECTORY/full" &&
 141         git commit-graph write --no-progress 2>err &&
 142         test_line_count = 0 err
 143 '
 144
 145 test_expect_success 'commit-graph verify progress off for redirected stderr' '
 146         cd "$TRASH_DIRECTORY/full" &&
 147         git commit-graph verify 2>err &&
 148         test_line_count = 0 err
 149 '
 150
 151 test_expect_success 'commit-graph verify force progress on for stderr' '
 152         cd "$TRASH_DIRECTORY/full" &&
 153         GIT_PROGRESS_DELAY=0 git commit-graph verify --progress 2>err &&
 154         test_file_not_empty err
 155 '
 156
 157 test_expect_success 'commit-graph verify with the --no-progress option' '
 158         cd "$TRASH_DIRECTORY/full" &&
 159         git commit-graph verify --no-progress 2>err &&
 160         test_line_count = 0 err
 161 '
 162
 163 # Current graph structure:
 164 #
 165 #   __M3___
 166 #  /   |   \
 167 # 3 M1 5 M2 7
 168 # |/  \|/  \|
 169 # 2    4    6
 170 # |___/____/
 171 # 1
 172
 173 test_expect_success 'write graph with merges' '
 174         cd "$TRASH_DIRECTORY/full" &&
 175         git commit-graph write &&
 176         test_path_is_file $objdir/info/commit-graph &&
 177         graph_read_expect "10" "extra_edges"
 178 '
 179
 180 graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
 181 graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
 182 graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
 183
 184 test_expect_success 'Add one more commit' '
 185         cd "$TRASH_DIRECTORY/full" &&
 186         test_commit 8 &&
 187         git branch commits/8 &&
 188         ls $objdir/pack | grep idx >existing-idx &&
 189         git repack &&
 190         ls $objdir/pack| grep idx | grep -v -f existing-idx >new-idx
 191 '
 192
 193 # Current graph structure:
 194 #
 195 #      8
 196 #      |
 197 #   __M3___
 198 #  /   |   \
 199 # 3 M1 5 M2 7
 200 # |/  \|/  \|
 201 # 2    4    6
 202 # |___/____/
 203 # 1
 204
 205 graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
 206 graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
 207
 208 test_expect_success 'write graph with new commit' '
 209         cd "$TRASH_DIRECTORY/full" &&
 210         git commit-graph write &&
 211         test_path_is_file $objdir/info/commit-graph &&
 212         graph_read_expect "11" "extra_edges"
 213 '
 214
 215 graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
 216 graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
 217
 218 test_expect_success 'write graph with nothing new' '
 219         cd "$TRASH_DIRECTORY/full" &&
 220         git commit-graph write &&
 221         test_path_is_file $objdir/info/commit-graph &&
 222         graph_read_expect "11" "extra_edges"
 223 '
 224
 225 graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
 226 graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
 227
 228 test_expect_success 'build graph from latest pack with closure' '
 229         cd "$TRASH_DIRECTORY/full" &&
 230         cat new-idx | git commit-graph write --stdin-packs &&
 231         test_path_is_file $objdir/info/commit-graph &&
 232         graph_read_expect "9" "extra_edges"
 233 '
 234
 235 graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
 236 graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
 237
 238 test_expect_success 'build graph from commits with closure' '
 239         cd "$TRASH_DIRECTORY/full" &&
 240         git tag -a -m "merge" tag/merge merge/2 &&
 241         git rev-parse tag/merge >commits-in &&
 242         git rev-parse merge/1 >>commits-in &&
 243         cat commits-in | git commit-graph write --stdin-commits &&
 244         test_path_is_file $objdir/info/commit-graph &&
 245         graph_read_expect "6"
 246 '
 247
 248 graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
 249 graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
 250
 251 test_expect_success 'build graph from commits with append' '
 252         cd "$TRASH_DIRECTORY/full" &&
 253         git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
 254         test_path_is_file $objdir/info/commit-graph &&
 255         graph_read_expect "10" "extra_edges"
 256 '
 257
 258 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 259 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 260
 261 test_expect_success 'build graph using --reachable' '
 262         cd "$TRASH_DIRECTORY/full" &&
 263         git commit-graph write --reachable &&
 264         test_path_is_file $objdir/info/commit-graph &&
 265         graph_read_expect "11" "extra_edges"
 266 '
 267
 268 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 269 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 270
 271 test_expect_success 'setup bare repo' '
 272         cd "$TRASH_DIRECTORY" &&
 273         git clone --bare --no-local full bare &&
 274         cd bare &&
 275         git config core.commitGraph true &&
 276         baredir="./objects"
 277 '
 278
 279 graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
 280 graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2
 281
 282 test_expect_success 'write graph in bare repo' '
 283         cd "$TRASH_DIRECTORY/bare" &&
 284         git commit-graph write &&
 285         test_path_is_file $baredir/info/commit-graph &&
 286         graph_read_expect "11" "extra_edges"
 287 '
 288
 289 graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
 290 graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
 291
 292 test_expect_success 'perform fast-forward merge in full repo' '
 293         cd "$TRASH_DIRECTORY/full" &&
 294         git checkout -b merge-5-to-8 commits/5 &&
 295         git merge commits/8 &&
 296         git show-ref -s merge-5-to-8 >output &&
 297         git show-ref -s commits/8 >expect &&
 298         test_cmp expect output
 299 '
 300
 301 test_expect_success 'check that gc computes commit-graph' '
 302         cd "$TRASH_DIRECTORY/full" &&
 303         git commit --allow-empty -m "blank" &&
 304         git commit-graph write --reachable &&
 305         cp $objdir/info/commit-graph commit-graph-before-gc &&
 306         git reset --hard HEAD~1 &&
 307         git config gc.writeCommitGraph true &&
 308         git gc &&
 309         cp $objdir/info/commit-graph commit-graph-after-gc &&
 310         ! test_cmp_bin commit-graph-before-gc commit-graph-after-gc &&
 311         git commit-graph write --reachable &&
 312         test_cmp_bin commit-graph-after-gc $objdir/info/commit-graph
 313 '
 314
 315 test_expect_success 'replace-objects invalidates commit-graph' '
 316         cd "$TRASH_DIRECTORY" &&
 317         test_when_finished rm -rf replace &&
 318         git clone full replace &&
 319         (
 320                 cd replace &&
 321                 git commit-graph write --reachable &&
 322                 test_path_is_file .git/objects/info/commit-graph &&
 323                 git replace HEAD~1 HEAD~2 &&
 324                 git -c core.commitGraph=false log >expect &&
 325                 git -c core.commitGraph=true log >actual &&
 326                 test_cmp expect actual &&
 327                 git commit-graph write --reachable &&
 328                 git -c core.commitGraph=false --no-replace-objects log >expect &&
 329                 git -c core.commitGraph=true --no-replace-objects log >actual &&
 330                 test_cmp expect actual &&
 331                 rm -rf .git/objects/info/commit-graph &&
 332                 git commit-graph write --reachable &&
 333                 test_path_is_file .git/objects/info/commit-graph
 334         )
 335 '
 336
 337 test_expect_success 'commit grafts invalidate commit-graph' '
 338         cd "$TRASH_DIRECTORY" &&
 339         test_when_finished rm -rf graft &&
 340         git clone full graft &&
 341         (
 342                 cd graft &&
 343                 git commit-graph write --reachable &&
 344                 test_path_is_file .git/objects/info/commit-graph &&
 345                 H1=$(git rev-parse --verify HEAD~1) &&
 346                 H3=$(git rev-parse --verify HEAD~3) &&
 347                 echo "$H1 $H3" >.git/info/grafts &&
 348                 git -c core.commitGraph=false log >expect &&
 349                 git -c core.commitGraph=true log >actual &&
 350                 test_cmp expect actual &&
 351                 git commit-graph write --reachable &&
 352                 git -c core.commitGraph=false --no-replace-objects log >expect &&
 353                 git -c core.commitGraph=true --no-replace-objects log >actual &&
 354                 test_cmp expect actual &&
 355                 rm -rf .git/objects/info/commit-graph &&
 356                 git commit-graph write --reachable &&
 357                 test_path_is_missing .git/objects/info/commit-graph
 358         )
 359 '
 360
 361 test_expect_success 'replace-objects invalidates commit-graph' '
 362         cd "$TRASH_DIRECTORY" &&
 363         test_when_finished rm -rf shallow &&
 364         git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
 365         (
 366                 cd shallow &&
 367                 git commit-graph write --reachable &&
 368                 test_path_is_missing .git/objects/info/commit-graph &&
 369                 git fetch origin --unshallow &&
 370                 git commit-graph write --reachable &&
 371                 test_path_is_file .git/objects/info/commit-graph
 372         )
 373 '
 374
 375 # the verify tests below expect the commit-graph to contain
 376 # exactly the commits reachable from the commits/8 branch.
 377 # If the file changes the set of commits in the list, then the
 378 # offsets into the binary file will result in different edits
 379 # and the tests will likely break.
 380
 381 test_expect_success 'git commit-graph verify' '
 382         cd "$TRASH_DIRECTORY/full" &&
 383         git rev-parse commits/8 | git commit-graph write --stdin-commits &&
 384         git commit-graph verify >output
 385 '
 386
 387 NUM_COMMITS=9
 388 NUM_OCTOPUS_EDGES=2
 389 HASH_LEN="$(test_oid rawsz)"
 390 GRAPH_BYTE_VERSION=4
 391 GRAPH_BYTE_HASH=5
 392 GRAPH_BYTE_CHUNK_COUNT=6
 393 GRAPH_CHUNK_LOOKUP_OFFSET=8
 394 GRAPH_CHUNK_LOOKUP_WIDTH=12
 395 GRAPH_CHUNK_LOOKUP_ROWS=5
 396 GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
 397 GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 398                             1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 399 GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 400                              2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 401 GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 402                        $GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
 403 GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
 404 GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
 405 GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
 406 GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
 407 GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
 408 GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
 409 GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
 410 GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
 411 GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
 412 GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
 413 GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
 414 GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
 415 GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
 416 GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
 417                              $GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
 418 GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
 419 GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
 420
 421 corrupt_graph_setup() {
 422         cd "$TRASH_DIRECTORY/full" &&
 423         test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
 424         cp $objdir/info/commit-graph commit-graph-backup
 425 }
 426
 427 corrupt_graph_verify() {
 428         grepstr=$1
 429         test_must_fail git commit-graph verify 2>test_err &&
 430         grep -v "^+" test_err >err &&
 431         test_i18ngrep "$grepstr" err &&
 432         if test "$2" != "no-copy"
 433         then
 434                 cp $objdir/info/commit-graph commit-graph-pre-write-test
 435         fi &&
 436         git status --short &&
 437         GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD=true git commit-graph write &&
 438         git commit-graph verify
 439 }
 440
 441 # usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
 442 # Manipulates the commit-graph file at the position
 443 # by inserting the data, optionally zeroing the file
 444 # starting at <zero_pos>, then runs 'git commit-graph verify'
 445 # and places the output in the file 'err'. Test 'err' for
 446 # the given string.
 447 corrupt_graph_and_verify() {
 448         pos=$1
 449         data="${2:-\0}"
 450         grepstr=$3
 451         corrupt_graph_setup &&
 452         orig_size=$(wc -c < $objdir/info/commit-graph) &&
 453         zero_pos=${4:-${orig_size}} &&
 454         printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
 455         dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
 456         generate_zero_bytes $(($orig_size - $zero_pos)) >>"$objdir/info/commit-graph" &&
 457         corrupt_graph_verify "$grepstr"
 458
 459 }
 460
 461 test_expect_success POSIXPERM,SANITY 'detect permission problem' '
 462         corrupt_graph_setup &&
 463         chmod 000 $objdir/info/commit-graph &&
 464         corrupt_graph_verify "Could not open" "no-copy"
 465 '
 466
 467 test_expect_success 'detect too small' '
 468         corrupt_graph_setup &&
 469         echo "a small graph" >$objdir/info/commit-graph &&
 470         corrupt_graph_verify "too small"
 471 '
 472
 473 test_expect_success 'detect bad signature' '
 474         corrupt_graph_and_verify 0 "\0" \
 475                 "graph signature"
 476 '
 477
 478 test_expect_success 'detect bad version' '
 479         corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
 480                 "graph version"
 481 '
 482
 483 test_expect_success 'detect bad hash version' '
 484         corrupt_graph_and_verify $GRAPH_BYTE_HASH "\02" \
 485                 "hash version"
 486 '
 487
 488 test_expect_success 'detect low chunk count' '
 489         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\02" \
 490                 "missing the .* chunk"
 491 '
 492
 493 test_expect_success 'detect missing OID fanout chunk' '
 494         corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
 495                 "missing the OID Fanout chunk"
 496 '
 497
 498 test_expect_success 'detect missing OID lookup chunk' '
 499         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
 500                 "missing the OID Lookup chunk"
 501 '
 502
 503 test_expect_success 'detect missing commit data chunk' '
 504         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
 505                 "missing the Commit Data chunk"
 506 '
 507
 508 test_expect_success 'detect incorrect fanout' '
 509         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
 510                 "fanout value"
 511 '
 512
 513 test_expect_success 'detect incorrect fanout final value' '
 514         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
 515                 "fanout value"
 516 '
 517
 518 test_expect_success 'detect incorrect OID order' '
 519         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
 520                 "incorrect OID order"
 521 '
 522
 523 test_expect_success 'detect OID not in object database' '
 524         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
 525                 "from object database"
 526 '
 527
 528 test_expect_success 'detect incorrect tree OID' '
 529         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
 530                 "root tree OID for commit"
 531 '
 532
 533 test_expect_success 'detect incorrect parent int-id' '
 534         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
 535                 "invalid parent"
 536 '
 537
 538 test_expect_success 'detect extra parent int-id' '
 539         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
 540                 "is too long"
 541 '
 542
 543 test_expect_success 'detect wrong parent' '
 544         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
 545                 "commit-graph parent for"
 546 '
 547
 548 test_expect_success 'detect incorrect generation number' '
 549         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
 550                 "generation for commit"
 551 '
 552
 553 test_expect_success 'detect incorrect generation number' '
 554         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \
 555                 "non-zero generation number"
 556 '
 557
 558 test_expect_success 'detect incorrect commit date' '
 559         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
 560                 "commit date"
 561 '
 562
 563 test_expect_success 'detect incorrect parent for octopus merge' '
 564         corrupt_graph_and_verify $GRAPH_BYTE_OCTOPUS "\01" \
 565                 "invalid parent"
 566 '
 567
 568 test_expect_success 'detect invalid checksum hash' '
 569         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 570                 "incorrect checksum"
 571 '
 572
 573 test_expect_success 'detect incorrect chunk count' '
 574         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\377" \
 575                 "chunk lookup table entry missing" $GRAPH_CHUNK_LOOKUP_OFFSET
 576 '
 577
 578 test_expect_success 'git fsck (checks commit-graph)' '
 579         cd "$TRASH_DIRECTORY/full" &&
 580         git fsck &&
 581         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 582                 "incorrect checksum" &&
 583         cp commit-graph-pre-write-test $objdir/info/commit-graph &&
 584         test_must_fail git fsck
 585 '
 586
 587 test_expect_success 'setup non-the_repository tests' '
 588         rm -rf repo &&
 589         git init repo &&
 590         test_commit -C repo one &&
 591         test_commit -C repo two &&
 592         git -C repo config core.commitGraph true &&
 593         git -C repo rev-parse two | \
 594                 git -C repo commit-graph write --stdin-commits
 595 '
 596
 597 test_expect_success 'parse_commit_in_graph works for non-the_repository' '
 598         test-tool repository parse_commit_in_graph \
 599                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
 600         {
 601                 git -C repo log --pretty=format:"%ct " -1 &&
 602                 git -C repo rev-parse one
 603         } >expect &&
 604         test_cmp expect actual &&
 605
 606         test-tool repository parse_commit_in_graph \
 607                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
 608         git -C repo log --pretty="%ct" -1 one >expect &&
 609         test_cmp expect actual
 610 '
 611
 612 test_expect_success 'get_commit_tree_in_graph works for non-the_repository' '
 613         test-tool repository get_commit_tree_in_graph \
 614                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
 615         git -C repo rev-parse two^{tree} >expect &&
 616         test_cmp expect actual &&
 617
 618         test-tool repository get_commit_tree_in_graph \
 619                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
 620         git -C repo rev-parse one^{tree} >expect &&
 621         test_cmp expect actual
 622 '
 623
 624 test_expect_success 'corrupt commit-graph write (broken parent)' '
 625         rm -rf repo &&
 626         git init repo &&
 627         (
 628                 cd repo &&
 629                 empty="$(git mktree </dev/null)" &&
 630                 cat >broken <<-EOF &&
 631                 tree $empty
 632                 parent 0000000000000000000000000000000000000000
 633                 author whatever <whatever@example.com> 1234 -0000
 634                 committer whatever <whatever@example.com> 1234 -0000
 635
 636                 broken commit
 637                 EOF
 638                 broken="$(git hash-object -w -t commit --literally broken)" &&
 639                 git commit-tree -p "$broken" -m "good commit" "$empty" >good &&
 640                 test_must_fail git commit-graph write --stdin-commits \
 641                         <good 2>test_err &&
 642                 test_i18ngrep "unable to parse commit" test_err
 643         )
 644 '
 645
 646 test_expect_success 'corrupt commit-graph write (missing tree)' '
 647         rm -rf repo &&
 648         git init repo &&
 649         (
 650                 cd repo &&
 651                 tree="$(git mktree </dev/null)" &&
 652                 cat >broken <<-EOF &&
 653                 parent 0000000000000000000000000000000000000000
 654                 author whatever <whatever@example.com> 1234 -0000
 655                 committer whatever <whatever@example.com> 1234 -0000
 656
 657                 broken commit
 658                 EOF
 659                 broken="$(git hash-object -w -t commit --literally broken)" &&
 660                 git commit-tree -p "$broken" -m "good" "$tree" >good &&
 661                 test_must_fail git commit-graph write --stdin-commits \
 662                         <good 2>test_err &&
 663                 test_i18ngrep "unable to parse commit" test_err
 664         )
 665 '
 666
 667 test_done