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   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 "$TRASH_DIRECTORY/full" &&
  11         git init &&
  12         git config core.commitGraph true &&
  13         objdir=".git/objects" &&
  14         test_oid_init
  15 '
  16
  17 test_expect_success POSIXPERM 'tweak umask for modebit tests' '
  18         umask 022
  19 '
  20
  21 test_expect_success 'verify graph with no graph file' '
  22         cd "$TRASH_DIRECTORY/full" &&
  23         git commit-graph verify
  24 '
  25
  26 test_expect_success 'write graph with no packs' '
  27         cd "$TRASH_DIRECTORY/full" &&
  28         git commit-graph write --object-dir $objdir &&
  29         test_path_is_missing $objdir/info/commit-graph
  30 '
  31
  32 test_expect_success 'exit with correct error on bad input to --stdin-packs' '
  33         cd "$TRASH_DIRECTORY/full" &&
  34         echo doesnotexist >in &&
  35         test_expect_code 1 git commit-graph write --stdin-packs <in 2>stderr &&
  36         test_i18ngrep "error adding pack" stderr
  37 '
  38
  39 test_expect_success 'create commits and repack' '
  40         cd "$TRASH_DIRECTORY/full" &&
  41         for i in $(test_seq 3)
  42         do
  43                 test_commit $i &&
  44                 git branch commits/$i
  45         done &&
  46         git repack
  47 '
  48
  49 graph_git_two_modes() {
  50         git -c core.commitGraph=true $1 >output
  51         git -c core.commitGraph=false $1 >expect
  52         test_cmp expect output
  53 }
  54
  55 graph_git_behavior() {
  56         MSG=$1
  57         DIR=$2
  58         BRANCH=$3
  59         COMPARE=$4
  60         test_expect_success "check normal git operations: $MSG" '
  61                 cd "$TRASH_DIRECTORY/$DIR" &&
  62                 graph_git_two_modes "log --oneline $BRANCH" &&
  63                 graph_git_two_modes "log --topo-order $BRANCH" &&
  64                 graph_git_two_modes "log --graph $COMPARE..$BRANCH" &&
  65                 graph_git_two_modes "branch -vv" &&
  66                 graph_git_two_modes "merge-base -a $BRANCH $COMPARE"
  67         '
  68 }
  69
  70 graph_git_behavior 'no graph' full commits/3 commits/1
  71
  72 graph_read_expect() {
  73         OPTIONAL=""
  74         NUM_CHUNKS=3
  75         if test ! -z $2
  76         then
  77                 OPTIONAL=" $2"
  78                 NUM_CHUNKS=$((3 + $(echo "$2" | wc -w)))
  79         fi
  80         cat >expect <<- EOF
  81         header: 43475048 1 1 $NUM_CHUNKS 0
  82         num_commits: $1
  83         chunks: oid_fanout oid_lookup commit_metadata$OPTIONAL
  84         EOF
  85         test-tool read-graph >output &&
  86         test_cmp expect output
  87 }
  88
  89 test_expect_success 'exit with correct error on bad input to --stdin-commits' '
  90         cd "$TRASH_DIRECTORY/full" &&
  91         # invalid, non-hex OID
  92         echo HEAD >in &&
  93         test_expect_code 1 git commit-graph write --stdin-commits <in 2>stderr &&
  94         test_i18ngrep "unexpected non-hex object ID: HEAD" stderr &&
  95         # non-existent OID
  96         echo $ZERO_OID >in &&
  97         test_expect_code 1 git commit-graph write --stdin-commits <in 2>stderr &&
  98         test_i18ngrep "invalid object" stderr &&
  99         # valid commit and tree OID
 100         git rev-parse HEAD HEAD^{tree} >in &&
 101         git commit-graph write --stdin-commits <in &&
 102         graph_read_expect 3
 103 '
 104
 105 test_expect_success 'write graph' '
 106         cd "$TRASH_DIRECTORY/full" &&
 107         git commit-graph write &&
 108         test_path_is_file $objdir/info/commit-graph &&
 109         graph_read_expect "3"
 110 '
 111
 112 test_expect_success POSIXPERM 'write graph has correct permissions' '
 113         test_path_is_file $objdir/info/commit-graph &&
 114         echo "-r--r--r--" >expect &&
 115         test_modebits $objdir/info/commit-graph >actual &&
 116         test_cmp expect actual
 117 '
 118
 119 graph_git_behavior 'graph exists' full commits/3 commits/1
 120
 121 test_expect_success 'Add more commits' '
 122         cd "$TRASH_DIRECTORY/full" &&
 123         git reset --hard commits/1 &&
 124         for i in $(test_seq 4 5)
 125         do
 126                 test_commit $i &&
 127                 git branch commits/$i
 128         done &&
 129         git reset --hard commits/2 &&
 130         for i in $(test_seq 6 7)
 131         do
 132                 test_commit $i &&
 133                 git branch commits/$i
 134         done &&
 135         git reset --hard commits/2 &&
 136         git merge commits/4 &&
 137         git branch merge/1 &&
 138         git reset --hard commits/4 &&
 139         git merge commits/6 &&
 140         git branch merge/2 &&
 141         git reset --hard commits/3 &&
 142         git merge commits/5 commits/7 &&
 143         git branch merge/3 &&
 144         git repack
 145 '
 146
 147 test_expect_success 'commit-graph write progress off for redirected stderr' '
 148         cd "$TRASH_DIRECTORY/full" &&
 149         git commit-graph write 2>err &&
 150         test_line_count = 0 err
 151 '
 152
 153 test_expect_success 'commit-graph write force progress on for stderr' '
 154         cd "$TRASH_DIRECTORY/full" &&
 155         GIT_PROGRESS_DELAY=0 git commit-graph write --progress 2>err &&
 156         test_file_not_empty err
 157 '
 158
 159 test_expect_success 'commit-graph write with the --no-progress option' '
 160         cd "$TRASH_DIRECTORY/full" &&
 161         git commit-graph write --no-progress 2>err &&
 162         test_line_count = 0 err
 163 '
 164
 165 test_expect_success 'commit-graph verify progress off for redirected stderr' '
 166         cd "$TRASH_DIRECTORY/full" &&
 167         git commit-graph verify 2>err &&
 168         test_line_count = 0 err
 169 '
 170
 171 test_expect_success 'commit-graph verify force progress on for stderr' '
 172         cd "$TRASH_DIRECTORY/full" &&
 173         GIT_PROGRESS_DELAY=0 git commit-graph verify --progress 2>err &&
 174         test_file_not_empty err
 175 '
 176
 177 test_expect_success 'commit-graph verify with the --no-progress option' '
 178         cd "$TRASH_DIRECTORY/full" &&
 179         git commit-graph verify --no-progress 2>err &&
 180         test_line_count = 0 err
 181 '
 182
 183 # Current graph structure:
 184 #
 185 #   __M3___
 186 #  /   |   \
 187 # 3 M1 5 M2 7
 188 # |/  \|/  \|
 189 # 2    4    6
 190 # |___/____/
 191 # 1
 192
 193 test_expect_success 'write graph with merges' '
 194         cd "$TRASH_DIRECTORY/full" &&
 195         git commit-graph write &&
 196         test_path_is_file $objdir/info/commit-graph &&
 197         graph_read_expect "10" "extra_edges"
 198 '
 199
 200 graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
 201 graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
 202 graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
 203
 204 test_expect_success 'Add one more commit' '
 205         cd "$TRASH_DIRECTORY/full" &&
 206         test_commit 8 &&
 207         git branch commits/8 &&
 208         ls $objdir/pack | grep idx >existing-idx &&
 209         git repack &&
 210         ls $objdir/pack| grep idx | grep -v -f existing-idx >new-idx
 211 '
 212
 213 # Current graph structure:
 214 #
 215 #      8
 216 #      |
 217 #   __M3___
 218 #  /   |   \
 219 # 3 M1 5 M2 7
 220 # |/  \|/  \|
 221 # 2    4    6
 222 # |___/____/
 223 # 1
 224
 225 graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
 226 graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
 227
 228 test_expect_success 'write graph with new commit' '
 229         cd "$TRASH_DIRECTORY/full" &&
 230         git commit-graph write &&
 231         test_path_is_file $objdir/info/commit-graph &&
 232         graph_read_expect "11" "extra_edges"
 233 '
 234
 235 graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
 236 graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
 237
 238 test_expect_success 'write graph with nothing new' '
 239         cd "$TRASH_DIRECTORY/full" &&
 240         git commit-graph write &&
 241         test_path_is_file $objdir/info/commit-graph &&
 242         graph_read_expect "11" "extra_edges"
 243 '
 244
 245 graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
 246 graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
 247
 248 test_expect_success 'build graph from latest pack with closure' '
 249         cd "$TRASH_DIRECTORY/full" &&
 250         cat new-idx | git commit-graph write --stdin-packs &&
 251         test_path_is_file $objdir/info/commit-graph &&
 252         graph_read_expect "9" "extra_edges"
 253 '
 254
 255 graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
 256 graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
 257
 258 test_expect_success 'build graph from commits with closure' '
 259         cd "$TRASH_DIRECTORY/full" &&
 260         git tag -a -m "merge" tag/merge merge/2 &&
 261         git rev-parse tag/merge >commits-in &&
 262         git rev-parse merge/1 >>commits-in &&
 263         cat commits-in | git commit-graph write --stdin-commits &&
 264         test_path_is_file $objdir/info/commit-graph &&
 265         graph_read_expect "6"
 266 '
 267
 268 graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
 269 graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
 270
 271 test_expect_success 'build graph from commits with append' '
 272         cd "$TRASH_DIRECTORY/full" &&
 273         git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
 274         test_path_is_file $objdir/info/commit-graph &&
 275         graph_read_expect "10" "extra_edges"
 276 '
 277
 278 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 279 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 280
 281 test_expect_success 'build graph using --reachable' '
 282         cd "$TRASH_DIRECTORY/full" &&
 283         git commit-graph write --reachable &&
 284         test_path_is_file $objdir/info/commit-graph &&
 285         graph_read_expect "11" "extra_edges"
 286 '
 287
 288 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 289 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 290
 291 test_expect_success 'setup bare repo' '
 292         cd "$TRASH_DIRECTORY" &&
 293         git clone --bare --no-local full bare &&
 294         cd bare &&
 295         git config core.commitGraph true &&
 296         baredir="./objects"
 297 '
 298
 299 graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
 300 graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2
 301
 302 test_expect_success 'write graph in bare repo' '
 303         cd "$TRASH_DIRECTORY/bare" &&
 304         git commit-graph write &&
 305         test_path_is_file $baredir/info/commit-graph &&
 306         graph_read_expect "11" "extra_edges"
 307 '
 308
 309 graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
 310 graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
 311
 312 test_expect_success 'perform fast-forward merge in full repo' '
 313         cd "$TRASH_DIRECTORY/full" &&
 314         git checkout -b merge-5-to-8 commits/5 &&
 315         git merge commits/8 &&
 316         git show-ref -s merge-5-to-8 >output &&
 317         git show-ref -s commits/8 >expect &&
 318         test_cmp expect output
 319 '
 320
 321 test_expect_success 'check that gc computes commit-graph' '
 322         cd "$TRASH_DIRECTORY/full" &&
 323         git commit --allow-empty -m "blank" &&
 324         git commit-graph write --reachable &&
 325         cp $objdir/info/commit-graph commit-graph-before-gc &&
 326         git reset --hard HEAD~1 &&
 327         git config gc.writeCommitGraph true &&
 328         git gc &&
 329         cp $objdir/info/commit-graph commit-graph-after-gc &&
 330         ! test_cmp_bin commit-graph-before-gc commit-graph-after-gc &&
 331         git commit-graph write --reachable &&
 332         test_cmp_bin commit-graph-after-gc $objdir/info/commit-graph
 333 '
 334
 335 test_expect_success 'replace-objects invalidates commit-graph' '
 336         cd "$TRASH_DIRECTORY" &&
 337         test_when_finished rm -rf replace &&
 338         git clone full replace &&
 339         (
 340                 cd replace &&
 341                 git commit-graph write --reachable &&
 342                 test_path_is_file .git/objects/info/commit-graph &&
 343                 git replace HEAD~1 HEAD~2 &&
 344                 git -c core.commitGraph=false log >expect &&
 345                 git -c core.commitGraph=true log >actual &&
 346                 test_cmp expect actual &&
 347                 git commit-graph write --reachable &&
 348                 git -c core.commitGraph=false --no-replace-objects log >expect &&
 349                 git -c core.commitGraph=true --no-replace-objects log >actual &&
 350                 test_cmp expect actual &&
 351                 rm -rf .git/objects/info/commit-graph &&
 352                 git commit-graph write --reachable &&
 353                 test_path_is_file .git/objects/info/commit-graph
 354         )
 355 '
 356
 357 test_expect_success 'commit grafts invalidate commit-graph' '
 358         cd "$TRASH_DIRECTORY" &&
 359         test_when_finished rm -rf graft &&
 360         git clone full graft &&
 361         (
 362                 cd graft &&
 363                 git commit-graph write --reachable &&
 364                 test_path_is_file .git/objects/info/commit-graph &&
 365                 H1=$(git rev-parse --verify HEAD~1) &&
 366                 H3=$(git rev-parse --verify HEAD~3) &&
 367                 echo "$H1 $H3" >.git/info/grafts &&
 368                 git -c core.commitGraph=false log >expect &&
 369                 git -c core.commitGraph=true log >actual &&
 370                 test_cmp expect actual &&
 371                 git commit-graph write --reachable &&
 372                 git -c core.commitGraph=false --no-replace-objects log >expect &&
 373                 git -c core.commitGraph=true --no-replace-objects log >actual &&
 374                 test_cmp expect actual &&
 375                 rm -rf .git/objects/info/commit-graph &&
 376                 git commit-graph write --reachable &&
 377                 test_path_is_missing .git/objects/info/commit-graph
 378         )
 379 '
 380
 381 test_expect_success 'replace-objects invalidates commit-graph' '
 382         cd "$TRASH_DIRECTORY" &&
 383         test_when_finished rm -rf shallow &&
 384         git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
 385         (
 386                 cd shallow &&
 387                 git commit-graph write --reachable &&
 388                 test_path_is_missing .git/objects/info/commit-graph &&
 389                 git fetch origin --unshallow &&
 390                 git commit-graph write --reachable &&
 391                 test_path_is_file .git/objects/info/commit-graph
 392         )
 393 '
 394
 395 # the verify tests below expect the commit-graph to contain
 396 # exactly the commits reachable from the commits/8 branch.
 397 # If the file changes the set of commits in the list, then the
 398 # offsets into the binary file will result in different edits
 399 # and the tests will likely break.
 400
 401 test_expect_success 'git commit-graph verify' '
 402         cd "$TRASH_DIRECTORY/full" &&
 403         git rev-parse commits/8 | git commit-graph write --stdin-commits &&
 404         git commit-graph verify >output
 405 '
 406
 407 NUM_COMMITS=9
 408 NUM_OCTOPUS_EDGES=2
 409 HASH_LEN="$(test_oid rawsz)"
 410 GRAPH_BYTE_VERSION=4
 411 GRAPH_BYTE_HASH=5
 412 GRAPH_BYTE_CHUNK_COUNT=6
 413 GRAPH_CHUNK_LOOKUP_OFFSET=8
 414 GRAPH_CHUNK_LOOKUP_WIDTH=12
 415 GRAPH_CHUNK_LOOKUP_ROWS=5
 416 GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
 417 GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 418                             1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 419 GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 420                              2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 421 GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 422                        $GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
 423 GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
 424 GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
 425 GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
 426 GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
 427 GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
 428 GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
 429 GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
 430 GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
 431 GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
 432 GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
 433 GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
 434 GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
 435 GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
 436 GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
 437                              $GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
 438 GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
 439 GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
 440
 441 corrupt_graph_setup() {
 442         cd "$TRASH_DIRECTORY/full" &&
 443         test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
 444         cp $objdir/info/commit-graph commit-graph-backup &&
 445         chmod u+w $objdir/info/commit-graph
 446 }
 447
 448 corrupt_graph_verify() {
 449         grepstr=$1
 450         test_must_fail git commit-graph verify 2>test_err &&
 451         grep -v "^+" test_err >err &&
 452         test_i18ngrep "$grepstr" err &&
 453         if test "$2" != "no-copy"
 454         then
 455                 cp $objdir/info/commit-graph commit-graph-pre-write-test
 456         fi &&
 457         git status --short &&
 458         GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD=true git commit-graph write &&
 459         chmod u+w $objdir/info/commit-graph &&
 460         git commit-graph verify
 461 }
 462
 463 # usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
 464 # Manipulates the commit-graph file at the position
 465 # by inserting the data, optionally zeroing the file
 466 # starting at <zero_pos>, then runs 'git commit-graph verify'
 467 # and places the output in the file 'err'. Test 'err' for
 468 # the given string.
 469 corrupt_graph_and_verify() {
 470         pos=$1
 471         data="${2:-\0}"
 472         grepstr=$3
 473         corrupt_graph_setup &&
 474         orig_size=$(wc -c < $objdir/info/commit-graph) &&
 475         zero_pos=${4:-${orig_size}} &&
 476         printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
 477         dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
 478         generate_zero_bytes $(($orig_size - $zero_pos)) >>"$objdir/info/commit-graph" &&
 479         corrupt_graph_verify "$grepstr"
 480
 481 }
 482
 483 test_expect_success POSIXPERM,SANITY 'detect permission problem' '
 484         corrupt_graph_setup &&
 485         chmod 000 $objdir/info/commit-graph &&
 486         corrupt_graph_verify "Could not open" "no-copy"
 487 '
 488
 489 test_expect_success 'detect too small' '
 490         corrupt_graph_setup &&
 491         echo "a small graph" >$objdir/info/commit-graph &&
 492         corrupt_graph_verify "too small"
 493 '
 494
 495 test_expect_success 'detect bad signature' '
 496         corrupt_graph_and_verify 0 "\0" \
 497                 "graph signature"
 498 '
 499
 500 test_expect_success 'detect bad version' '
 501         corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
 502                 "graph version"
 503 '
 504
 505 test_expect_success 'detect bad hash version' '
 506         corrupt_graph_and_verify $GRAPH_BYTE_HASH "\03" \
 507                 "hash version"
 508 '
 509
 510 test_expect_success 'detect low chunk count' '
 511         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\02" \
 512                 "missing the .* chunk"
 513 '
 514
 515 test_expect_success 'detect missing OID fanout chunk' '
 516         corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
 517                 "missing the OID Fanout chunk"
 518 '
 519
 520 test_expect_success 'detect missing OID lookup chunk' '
 521         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
 522                 "missing the OID Lookup chunk"
 523 '
 524
 525 test_expect_success 'detect missing commit data chunk' '
 526         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
 527                 "missing the Commit Data chunk"
 528 '
 529
 530 test_expect_success 'detect incorrect fanout' '
 531         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
 532                 "fanout value"
 533 '
 534
 535 test_expect_success 'detect incorrect fanout final value' '
 536         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
 537                 "fanout value"
 538 '
 539
 540 test_expect_success 'detect incorrect OID order' '
 541         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
 542                 "incorrect OID order"
 543 '
 544
 545 test_expect_success 'detect OID not in object database' '
 546         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
 547                 "from object database"
 548 '
 549
 550 test_expect_success 'detect incorrect tree OID' '
 551         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
 552                 "root tree OID for commit"
 553 '
 554
 555 test_expect_success 'detect incorrect parent int-id' '
 556         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
 557                 "invalid parent"
 558 '
 559
 560 test_expect_success 'detect extra parent int-id' '
 561         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
 562                 "is too long"
 563 '
 564
 565 test_expect_success 'detect wrong parent' '
 566         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
 567                 "commit-graph parent for"
 568 '
 569
 570 test_expect_success 'detect incorrect generation number' '
 571         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
 572                 "generation for commit"
 573 '
 574
 575 test_expect_success 'detect incorrect generation number' '
 576         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \
 577                 "non-zero generation number"
 578 '
 579
 580 test_expect_success 'detect incorrect commit date' '
 581         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
 582                 "commit date"
 583 '
 584
 585 test_expect_success 'detect incorrect parent for octopus merge' '
 586         corrupt_graph_and_verify $GRAPH_BYTE_OCTOPUS "\01" \
 587                 "invalid parent"
 588 '
 589
 590 test_expect_success 'detect invalid checksum hash' '
 591         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 592                 "incorrect checksum"
 593 '
 594
 595 test_expect_success 'detect incorrect chunk count' '
 596         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\377" \
 597                 "chunk lookup table entry missing" $GRAPH_CHUNK_LOOKUP_OFFSET
 598 '
 599
 600 test_expect_success 'git fsck (checks commit-graph)' '
 601         cd "$TRASH_DIRECTORY/full" &&
 602         git fsck &&
 603         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 604                 "incorrect checksum" &&
 605         cp commit-graph-pre-write-test $objdir/info/commit-graph &&
 606         test_must_fail git fsck
 607 '
 608
 609 test_expect_success 'setup non-the_repository tests' '
 610         rm -rf repo &&
 611         git init repo &&
 612         test_commit -C repo one &&
 613         test_commit -C repo two &&
 614         git -C repo config core.commitGraph true &&
 615         git -C repo rev-parse two | \
 616                 git -C repo commit-graph write --stdin-commits
 617 '
 618
 619 test_expect_success 'parse_commit_in_graph works for non-the_repository' '
 620         test-tool repository parse_commit_in_graph \
 621                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
 622         {
 623                 git -C repo log --pretty=format:"%ct " -1 &&
 624                 git -C repo rev-parse one
 625         } >expect &&
 626         test_cmp expect actual &&
 627
 628         test-tool repository parse_commit_in_graph \
 629                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
 630         git -C repo log --pretty="%ct" -1 one >expect &&
 631         test_cmp expect actual
 632 '
 633
 634 test_expect_success 'get_commit_tree_in_graph works for non-the_repository' '
 635         test-tool repository get_commit_tree_in_graph \
 636                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
 637         git -C repo rev-parse two^{tree} >expect &&
 638         test_cmp expect actual &&
 639
 640         test-tool repository get_commit_tree_in_graph \
 641                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
 642         git -C repo rev-parse one^{tree} >expect &&
 643         test_cmp expect actual
 644 '
 645
 646 test_expect_success 'corrupt commit-graph write (broken parent)' '
 647         rm -rf repo &&
 648         git init repo &&
 649         (
 650                 cd repo &&
 651                 empty="$(git mktree </dev/null)" &&
 652                 cat >broken <<-EOF &&
 653                 tree $empty
 654                 parent $ZERO_OID
 655                 author whatever <whatever@example.com> 1234 -0000
 656                 committer whatever <whatever@example.com> 1234 -0000
 657
 658                 broken commit
 659                 EOF
 660                 broken="$(git hash-object -w -t commit --literally broken)" &&
 661                 git commit-tree -p "$broken" -m "good commit" "$empty" >good &&
 662                 test_must_fail git commit-graph write --stdin-commits \
 663                         <good 2>test_err &&
 664                 test_i18ngrep "unable to parse commit" test_err
 665         )
 666 '
 667
 668 test_expect_success 'corrupt commit-graph write (missing tree)' '
 669         rm -rf repo &&
 670         git init repo &&
 671         (
 672                 cd repo &&
 673                 tree="$(git mktree </dev/null)" &&
 674                 cat >broken <<-EOF &&
 675                 parent $ZERO_OID
 676                 author whatever <whatever@example.com> 1234 -0000
 677                 committer whatever <whatever@example.com> 1234 -0000
 678
 679                 broken commit
 680                 EOF
 681                 broken="$(git hash-object -w -t commit --literally broken)" &&
 682                 git commit-tree -p "$broken" -m "good" "$tree" >good &&
 683                 test_must_fail git commit-graph write --stdin-commits \
 684                         <good 2>test_err &&
 685                 test_i18ngrep "unable to parse commit" test_err
 686         )
 687 '
 688
 689 test_done