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