t/t5318-commit-graph.sh

   1 #!/bin/sh
   2
   3 test_description='commit graph'
   4 . ./test-lib.sh
   5
   6 GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS=0
   7
   8 test_expect_success 'setup full repo' '
   9         mkdir full &&
  10         cd "$TRASH_DIRECTORY/full" &&
  11         git init &&
  12         git config core.commitGraph true &&
  13         objdir=".git/objects" &&
  14         test_oid_init
  15 '
  16
  17 test_expect_success 'verify graph with no graph file' '
  18         cd "$TRASH_DIRECTORY/full" &&
  19         git commit-graph verify
  20 '
  21
  22 test_expect_success 'write graph with no packs' '
  23         cd "$TRASH_DIRECTORY/full" &&
  24         git commit-graph write --object-dir $objdir &&
  25         test_path_is_missing $objdir/info/commit-graph
  26 '
  27
  28 test_expect_success 'exit with correct error on bad input to --stdin-packs' '
  29         cd "$TRASH_DIRECTORY/full" &&
  30         echo doesnotexist >in &&
  31         test_expect_code 1 git commit-graph write --stdin-packs <in 2>stderr &&
  32         test_i18ngrep "error adding pack" stderr
  33 '
  34
  35 test_expect_success 'create commits and repack' '
  36         cd "$TRASH_DIRECTORY/full" &&
  37         for i in $(test_seq 3)
  38         do
  39                 test_commit $i &&
  40                 git branch commits/$i
  41         done &&
  42         git repack
  43 '
  44
  45 test_expect_success 'exit with correct error on bad input to --stdin-commits' '
  46         cd "$TRASH_DIRECTORY/full" &&
  47         echo HEAD | test_expect_code 1 git commit-graph write --stdin-commits 2>stderr &&
  48         test_i18ngrep "unexpected non-hex object ID: HEAD" stderr &&
  49         # valid tree OID, but not a commit OID
  50         git rev-parse HEAD^{tree} | test_expect_code 1 git commit-graph write --stdin-commits 2>stderr &&
  51         test_i18ngrep "invalid commit object id" stderr
  52 '
  53
  54 graph_git_two_modes() {
  55         git -c core.commitGraph=true $1 >output
  56         git -c core.commitGraph=false $1 >expect
  57         test_cmp expect output
  58 }
  59
  60 graph_git_behavior() {
  61         MSG=$1
  62         DIR=$2
  63         BRANCH=$3
  64         COMPARE=$4
  65         test_expect_success "check normal git operations: $MSG" '
  66                 cd "$TRASH_DIRECTORY/$DIR" &&
  67                 graph_git_two_modes "log --oneline $BRANCH" &&
  68                 graph_git_two_modes "log --topo-order $BRANCH" &&
  69                 graph_git_two_modes "log --graph $COMPARE..$BRANCH" &&
  70                 graph_git_two_modes "branch -vv" &&
  71                 graph_git_two_modes "merge-base -a $BRANCH $COMPARE"
  72         '
  73 }
  74
  75 graph_git_behavior 'no graph' full commits/3 commits/1
  76
  77 graph_read_expect() {
  78         OPTIONAL=""
  79         NUM_CHUNKS=3
  80         if test ! -z $2
  81         then
  82                 OPTIONAL=" $2"
  83                 NUM_CHUNKS=$((3 + $(echo "$2" | wc -w)))
  84         fi
  85         cat >expect <<- EOF
  86         header: 43475048 1 1 $NUM_CHUNKS 0
  87         num_commits: $1
  88         chunks: oid_fanout oid_lookup commit_metadata$OPTIONAL
  89         EOF
  90         test-tool read-graph >output &&
  91         test_cmp expect output
  92 }
  93
  94 test_expect_success 'write graph' '
  95         cd "$TRASH_DIRECTORY/full" &&
  96         git commit-graph write &&
  97         test_path_is_file $objdir/info/commit-graph &&
  98         graph_read_expect "3"
  99 '
 100
 101 graph_git_behavior 'graph exists' full commits/3 commits/1
 102
 103 test_expect_success 'Add more commits' '
 104         cd "$TRASH_DIRECTORY/full" &&
 105         git reset --hard commits/1 &&
 106         for i in $(test_seq 4 5)
 107         do
 108                 test_commit $i &&
 109                 git branch commits/$i
 110         done &&
 111         git reset --hard commits/2 &&
 112         for i in $(test_seq 6 7)
 113         do
 114                 test_commit $i &&
 115                 git branch commits/$i
 116         done &&
 117         git reset --hard commits/2 &&
 118         git merge commits/4 &&
 119         git branch merge/1 &&
 120         git reset --hard commits/4 &&
 121         git merge commits/6 &&
 122         git branch merge/2 &&
 123         git reset --hard commits/3 &&
 124         git merge commits/5 commits/7 &&
 125         git branch merge/3 &&
 126         git repack
 127 '
 128
 129 test_expect_success 'commit-graph write progress off for redirected stderr' '
 130         cd "$TRASH_DIRECTORY/full" &&
 131         git commit-graph write 2>err &&
 132         test_line_count = 0 err
 133 '
 134
 135 test_expect_success 'commit-graph write force progress on for stderr' '
 136         cd "$TRASH_DIRECTORY/full" &&
 137         GIT_PROGRESS_DELAY=0 git commit-graph write --progress 2>err &&
 138         test_file_not_empty err
 139 '
 140
 141 test_expect_success 'commit-graph write with the --no-progress option' '
 142         cd "$TRASH_DIRECTORY/full" &&
 143         git commit-graph write --no-progress 2>err &&
 144         test_line_count = 0 err
 145 '
 146
 147 test_expect_success 'commit-graph verify progress off for redirected stderr' '
 148         cd "$TRASH_DIRECTORY/full" &&
 149         git commit-graph verify 2>err &&
 150         test_line_count = 0 err
 151 '
 152
 153 test_expect_success 'commit-graph verify force progress on for stderr' '
 154         cd "$TRASH_DIRECTORY/full" &&
 155         GIT_PROGRESS_DELAY=0 git commit-graph verify --progress 2>err &&
 156         test_file_not_empty err
 157 '
 158
 159 test_expect_success 'commit-graph verify with the --no-progress option' '
 160         cd "$TRASH_DIRECTORY/full" &&
 161         git commit-graph verify --no-progress 2>err &&
 162         test_line_count = 0 err
 163 '
 164
 165 # Current graph structure:
 166 #
 167 #   __M3___
 168 #  /   |   \
 169 # 3 M1 5 M2 7
 170 # |/  \|/  \|
 171 # 2    4    6
 172 # |___/____/
 173 # 1
 174
 175 test_expect_success 'write graph with merges' '
 176         cd "$TRASH_DIRECTORY/full" &&
 177         git commit-graph write &&
 178         test_path_is_file $objdir/info/commit-graph &&
 179         graph_read_expect "10" "extra_edges"
 180 '
 181
 182 graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
 183 graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
 184 graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
 185
 186 test_expect_success 'Add one more commit' '
 187         cd "$TRASH_DIRECTORY/full" &&
 188         test_commit 8 &&
 189         git branch commits/8 &&
 190         ls $objdir/pack | grep idx >existing-idx &&
 191         git repack &&
 192         ls $objdir/pack| grep idx | grep -v -f existing-idx >new-idx
 193 '
 194
 195 # Current graph structure:
 196 #
 197 #      8
 198 #      |
 199 #   __M3___
 200 #  /   |   \
 201 # 3 M1 5 M2 7
 202 # |/  \|/  \|
 203 # 2    4    6
 204 # |___/____/
 205 # 1
 206
 207 graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
 208 graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
 209
 210 test_expect_success 'write graph with new commit' '
 211         cd "$TRASH_DIRECTORY/full" &&
 212         git commit-graph write &&
 213         test_path_is_file $objdir/info/commit-graph &&
 214         graph_read_expect "11" "extra_edges"
 215 '
 216
 217 graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
 218 graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
 219
 220 test_expect_success 'write graph with nothing new' '
 221         cd "$TRASH_DIRECTORY/full" &&
 222         git commit-graph write &&
 223         test_path_is_file $objdir/info/commit-graph &&
 224         graph_read_expect "11" "extra_edges"
 225 '
 226
 227 graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
 228 graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
 229
 230 test_expect_success 'build graph from latest pack with closure' '
 231         cd "$TRASH_DIRECTORY/full" &&
 232         cat new-idx | git commit-graph write --stdin-packs &&
 233         test_path_is_file $objdir/info/commit-graph &&
 234         graph_read_expect "9" "extra_edges"
 235 '
 236
 237 graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
 238 graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
 239
 240 test_expect_success 'build graph from commits with closure' '
 241         cd "$TRASH_DIRECTORY/full" &&
 242         git tag -a -m "merge" tag/merge merge/2 &&
 243         git rev-parse tag/merge >commits-in &&
 244         git rev-parse merge/1 >>commits-in &&
 245         cat commits-in | git commit-graph write --stdin-commits &&
 246         test_path_is_file $objdir/info/commit-graph &&
 247         graph_read_expect "6"
 248 '
 249
 250 graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
 251 graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
 252
 253 test_expect_success 'build graph from commits with append' '
 254         cd "$TRASH_DIRECTORY/full" &&
 255         git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
 256         test_path_is_file $objdir/info/commit-graph &&
 257         graph_read_expect "10" "extra_edges"
 258 '
 259
 260 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 261 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 262
 263 test_expect_success 'build graph using --reachable' '
 264         cd "$TRASH_DIRECTORY/full" &&
 265         git commit-graph write --reachable &&
 266         test_path_is_file $objdir/info/commit-graph &&
 267         graph_read_expect "11" "extra_edges"
 268 '
 269
 270 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 271 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 272
 273 test_expect_success 'setup bare repo' '
 274         cd "$TRASH_DIRECTORY" &&
 275         git clone --bare --no-local full bare &&
 276         cd bare &&
 277         git config core.commitGraph true &&
 278         baredir="./objects"
 279 '
 280
 281 graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
 282 graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2
 283
 284 test_expect_success 'write graph in bare repo' '
 285         cd "$TRASH_DIRECTORY/bare" &&
 286         git commit-graph write &&
 287         test_path_is_file $baredir/info/commit-graph &&
 288         graph_read_expect "11" "extra_edges"
 289 '
 290
 291 graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
 292 graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
 293
 294 test_expect_success 'perform fast-forward merge in full repo' '
 295         cd "$TRASH_DIRECTORY/full" &&
 296         git checkout -b merge-5-to-8 commits/5 &&
 297         git merge commits/8 &&
 298         git show-ref -s merge-5-to-8 >output &&
 299         git show-ref -s commits/8 >expect &&
 300         test_cmp expect output
 301 '
 302
 303 test_expect_success 'check that gc computes commit-graph' '
 304         cd "$TRASH_DIRECTORY/full" &&
 305         git commit --allow-empty -m "blank" &&
 306         git commit-graph write --reachable &&
 307         cp $objdir/info/commit-graph commit-graph-before-gc &&
 308         git reset --hard HEAD~1 &&
 309         git config gc.writeCommitGraph true &&
 310         git gc &&
 311         cp $objdir/info/commit-graph commit-graph-after-gc &&
 312         ! test_cmp_bin commit-graph-before-gc commit-graph-after-gc &&
 313         git commit-graph write --reachable &&
 314         test_cmp_bin commit-graph-after-gc $objdir/info/commit-graph
 315 '
 316
 317 test_expect_success 'replace-objects invalidates commit-graph' '
 318         cd "$TRASH_DIRECTORY" &&
 319         test_when_finished rm -rf replace &&
 320         git clone full replace &&
 321         (
 322                 cd replace &&
 323                 git commit-graph write --reachable &&
 324                 test_path_is_file .git/objects/info/commit-graph &&
 325                 git replace HEAD~1 HEAD~2 &&
 326                 git -c core.commitGraph=false log >expect &&
 327                 git -c core.commitGraph=true log >actual &&
 328                 test_cmp expect actual &&
 329                 git commit-graph write --reachable &&
 330                 git -c core.commitGraph=false --no-replace-objects log >expect &&
 331                 git -c core.commitGraph=true --no-replace-objects log >actual &&
 332                 test_cmp expect actual &&
 333                 rm -rf .git/objects/info/commit-graph &&
 334                 git commit-graph write --reachable &&
 335                 test_path_is_file .git/objects/info/commit-graph
 336         )
 337 '
 338
 339 test_expect_success 'commit grafts invalidate commit-graph' '
 340         cd "$TRASH_DIRECTORY" &&
 341         test_when_finished rm -rf graft &&
 342         git clone full graft &&
 343         (
 344                 cd graft &&
 345                 git commit-graph write --reachable &&
 346                 test_path_is_file .git/objects/info/commit-graph &&
 347                 H1=$(git rev-parse --verify HEAD~1) &&
 348                 H3=$(git rev-parse --verify HEAD~3) &&
 349                 echo "$H1 $H3" >.git/info/grafts &&
 350                 git -c core.commitGraph=false log >expect &&
 351                 git -c core.commitGraph=true log >actual &&
 352                 test_cmp expect actual &&
 353                 git commit-graph write --reachable &&
 354                 git -c core.commitGraph=false --no-replace-objects log >expect &&
 355                 git -c core.commitGraph=true --no-replace-objects log >actual &&
 356                 test_cmp expect actual &&
 357                 rm -rf .git/objects/info/commit-graph &&
 358                 git commit-graph write --reachable &&
 359                 test_path_is_missing .git/objects/info/commit-graph
 360         )
 361 '
 362
 363 test_expect_success 'replace-objects invalidates commit-graph' '
 364         cd "$TRASH_DIRECTORY" &&
 365         test_when_finished rm -rf shallow &&
 366         git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
 367         (
 368                 cd shallow &&
 369                 git commit-graph write --reachable &&
 370                 test_path_is_missing .git/objects/info/commit-graph &&
 371                 git fetch origin --unshallow &&
 372                 git commit-graph write --reachable &&
 373                 test_path_is_file .git/objects/info/commit-graph
 374         )
 375 '
 376
 377 # the verify tests below expect the commit-graph to contain
 378 # exactly the commits reachable from the commits/8 branch.
 379 # If the file changes the set of commits in the list, then the
 380 # offsets into the binary file will result in different edits
 381 # and the tests will likely break.
 382
 383 test_expect_success 'git commit-graph verify' '
 384         cd "$TRASH_DIRECTORY/full" &&
 385         git rev-parse commits/8 | git commit-graph write --stdin-commits &&
 386         git commit-graph verify >output
 387 '
 388
 389 NUM_COMMITS=9
 390 NUM_OCTOPUS_EDGES=2
 391 HASH_LEN="$(test_oid rawsz)"
 392 GRAPH_BYTE_VERSION=4
 393 GRAPH_BYTE_HASH=5
 394 GRAPH_BYTE_CHUNK_COUNT=6
 395 GRAPH_CHUNK_LOOKUP_OFFSET=8
 396 GRAPH_CHUNK_LOOKUP_WIDTH=12
 397 GRAPH_CHUNK_LOOKUP_ROWS=5
 398 GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
 399 GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 400                             1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 401 GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 402                              2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 403 GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 404                        $GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
 405 GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
 406 GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
 407 GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
 408 GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
 409 GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
 410 GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
 411 GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
 412 GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
 413 GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
 414 GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
 415 GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
 416 GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
 417 GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
 418 GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
 419                              $GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
 420 GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
 421 GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
 422
 423 corrupt_graph_setup() {
 424         cd "$TRASH_DIRECTORY/full" &&
 425         test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
 426         cp $objdir/info/commit-graph commit-graph-backup
 427 }
 428
 429 corrupt_graph_verify() {
 430         grepstr=$1
 431         test_must_fail git commit-graph verify 2>test_err &&
 432         grep -v "^+" test_err >err &&
 433         test_i18ngrep "$grepstr" err &&
 434         if test "$2" != "no-copy"
 435         then
 436                 cp $objdir/info/commit-graph commit-graph-pre-write-test
 437         fi &&
 438         git status --short &&
 439         GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD=true git commit-graph write &&
 440         git commit-graph verify
 441 }
 442
 443 # usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
 444 # Manipulates the commit-graph file at the position
 445 # by inserting the data, optionally zeroing the file
 446 # starting at <zero_pos>, then runs 'git commit-graph verify'
 447 # and places the output in the file 'err'. Test 'err' for
 448 # the given string.
 449 corrupt_graph_and_verify() {
 450         pos=$1
 451         data="${2:-\0}"
 452         grepstr=$3
 453         corrupt_graph_setup &&
 454         orig_size=$(wc -c < $objdir/info/commit-graph) &&
 455         zero_pos=${4:-${orig_size}} &&
 456         printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
 457         dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
 458         generate_zero_bytes $(($orig_size - $zero_pos)) >>"$objdir/info/commit-graph" &&
 459         corrupt_graph_verify "$grepstr"
 460
 461 }
 462
 463 test_expect_success POSIXPERM,SANITY 'detect permission problem' '
 464         corrupt_graph_setup &&
 465         chmod 000 $objdir/info/commit-graph &&
 466         corrupt_graph_verify "Could not open" "no-copy"
 467 '
 468
 469 test_expect_success 'detect too small' '
 470         corrupt_graph_setup &&
 471         echo "a small graph" >$objdir/info/commit-graph &&
 472         corrupt_graph_verify "too small"
 473 '
 474
 475 test_expect_success 'detect bad signature' '
 476         corrupt_graph_and_verify 0 "\0" \
 477                 "graph signature"
 478 '
 479
 480 test_expect_success 'detect bad version' '
 481         corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
 482                 "graph version"
 483 '
 484
 485 test_expect_success 'detect bad hash version' '
 486         corrupt_graph_and_verify $GRAPH_BYTE_HASH "\03" \
 487                 "hash version"
 488 '
 489
 490 test_expect_success 'detect low chunk count' '
 491         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\02" \
 492                 "missing the .* chunk"
 493 '
 494
 495 test_expect_success 'detect missing OID fanout chunk' '
 496         corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
 497                 "missing the OID Fanout chunk"
 498 '
 499
 500 test_expect_success 'detect missing OID lookup chunk' '
 501         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
 502                 "missing the OID Lookup chunk"
 503 '
 504
 505 test_expect_success 'detect missing commit data chunk' '
 506         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
 507                 "missing the Commit Data chunk"
 508 '
 509
 510 test_expect_success 'detect incorrect fanout' '
 511         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
 512                 "fanout value"
 513 '
 514
 515 test_expect_success 'detect incorrect fanout final value' '
 516         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
 517                 "fanout value"
 518 '
 519
 520 test_expect_success 'detect incorrect OID order' '
 521         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
 522                 "incorrect OID order"
 523 '
 524
 525 test_expect_success 'detect OID not in object database' '
 526         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
 527                 "from object database"
 528 '
 529
 530 test_expect_success 'detect incorrect tree OID' '
 531         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
 532                 "root tree OID for commit"
 533 '
 534
 535 test_expect_success 'detect incorrect parent int-id' '
 536         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
 537                 "invalid parent"
 538 '
 539
 540 test_expect_success 'detect extra parent int-id' '
 541         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
 542                 "is too long"
 543 '
 544
 545 test_expect_success 'detect wrong parent' '
 546         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
 547                 "commit-graph parent for"
 548 '
 549
 550 test_expect_success 'detect incorrect generation number' '
 551         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
 552                 "generation for commit"
 553 '
 554
 555 test_expect_success 'detect incorrect generation number' '
 556         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \
 557                 "non-zero generation number"
 558 '
 559
 560 test_expect_success 'detect incorrect commit date' '
 561         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
 562                 "commit date"
 563 '
 564
 565 test_expect_success 'detect incorrect parent for octopus merge' '
 566         corrupt_graph_and_verify $GRAPH_BYTE_OCTOPUS "\01" \
 567                 "invalid parent"
 568 '
 569
 570 test_expect_success 'detect invalid checksum hash' '
 571         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 572                 "incorrect checksum"
 573 '
 574
 575 test_expect_success 'detect incorrect chunk count' '
 576         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\377" \
 577                 "chunk lookup table entry missing" $GRAPH_CHUNK_LOOKUP_OFFSET
 578 '
 579
 580 test_expect_success 'git fsck (checks commit-graph)' '
 581         cd "$TRASH_DIRECTORY/full" &&
 582         git fsck &&
 583         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 584                 "incorrect checksum" &&
 585         cp commit-graph-pre-write-test $objdir/info/commit-graph &&
 586         test_must_fail git fsck
 587 '
 588
 589 test_expect_success 'setup non-the_repository tests' '
 590         rm -rf repo &&
 591         git init repo &&
 592         test_commit -C repo one &&
 593         test_commit -C repo two &&
 594         git -C repo config core.commitGraph true &&
 595         git -C repo rev-parse two | \
 596                 git -C repo commit-graph write --stdin-commits
 597 '
 598
 599 test_expect_success 'parse_commit_in_graph works for non-the_repository' '
 600         test-tool repository parse_commit_in_graph \
 601                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
 602         {
 603                 git -C repo log --pretty=format:"%ct " -1 &&
 604                 git -C repo rev-parse one
 605         } >expect &&
 606         test_cmp expect actual &&
 607
 608         test-tool repository parse_commit_in_graph \
 609                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
 610         git -C repo log --pretty="%ct" -1 one >expect &&
 611         test_cmp expect actual
 612 '
 613
 614 test_expect_success 'get_commit_tree_in_graph works for non-the_repository' '
 615         test-tool repository get_commit_tree_in_graph \
 616                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
 617         git -C repo rev-parse two^{tree} >expect &&
 618         test_cmp expect actual &&
 619
 620         test-tool repository get_commit_tree_in_graph \
 621                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
 622         git -C repo rev-parse one^{tree} >expect &&
 623         test_cmp expect actual
 624 '
 625
 626 test_expect_success 'corrupt commit-graph write (broken parent)' '
 627         rm -rf repo &&
 628         git init repo &&
 629         (
 630                 cd repo &&
 631                 empty="$(git mktree </dev/null)" &&
 632                 cat >broken <<-EOF &&
 633                 tree $empty
 634                 parent $ZERO_OID
 635                 author whatever <whatever@example.com> 1234 -0000
 636                 committer whatever <whatever@example.com> 1234 -0000
 637
 638                 broken commit
 639                 EOF
 640                 broken="$(git hash-object -w -t commit --literally broken)" &&
 641                 git commit-tree -p "$broken" -m "good commit" "$empty" >good &&
 642                 test_must_fail git commit-graph write --stdin-commits \
 643                         <good 2>test_err &&
 644                 test_i18ngrep "unable to parse commit" test_err
 645         )
 646 '
 647
 648 test_expect_success 'corrupt commit-graph write (missing tree)' '
 649         rm -rf repo &&
 650         git init repo &&
 651         (
 652                 cd repo &&
 653                 tree="$(git mktree </dev/null)" &&
 654                 cat >broken <<-EOF &&
 655                 parent $ZERO_OID
 656                 author whatever <whatever@example.com> 1234 -0000
 657                 committer whatever <whatever@example.com> 1234 -0000
 658
 659                 broken commit
 660                 EOF
 661                 broken="$(git hash-object -w -t commit --literally broken)" &&
 662                 git commit-tree -p "$broken" -m "good" "$tree" >good &&
 663                 test_must_fail git commit-graph write --stdin-commits \
 664                         <good 2>test_err &&
 665                 test_i18ngrep "unable to parse commit" test_err
 666         )
 667 '
 668
 669 test_done