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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 "$TRASH_DIRECTORY/full" &&
 142         git commit-graph write 2>err &&
 143         test_must_be_empty err
 144 '
 145
 146 test_expect_success 'commit-graph write force progress on for stderr' '
 147         cd "$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 "$TRASH_DIRECTORY/full" &&
 154         git commit-graph write --no-progress 2>err &&
 155         test_must_be_empty err
 156 '
 157
 158 test_expect_success 'commit-graph write --stdin-commits progress off for redirected stderr' '
 159         cd "$TRASH_DIRECTORY/full" &&
 160         git rev-parse commits/5 >in &&
 161         git commit-graph write --stdin-commits <in 2>err &&
 162         test_must_be_empty err
 163 '
 164
 165 test_expect_success 'commit-graph write --stdin-commits force progress on for stderr' '
 166         cd "$TRASH_DIRECTORY/full" &&
 167         git rev-parse commits/5 >in &&
 168         GIT_PROGRESS_DELAY=0 git commit-graph write --stdin-commits --progress <in 2>err &&
 169         test_i18ngrep "Collecting commits from input" err
 170 '
 171
 172 test_expect_success 'commit-graph write --stdin-commits with the --no-progress option' '
 173         cd "$TRASH_DIRECTORY/full" &&
 174         git rev-parse commits/5 >in &&
 175         git commit-graph write --stdin-commits --no-progress <in 2>err &&
 176         test_must_be_empty err
 177 '
 178
 179 test_expect_success 'commit-graph verify progress off for redirected stderr' '
 180         cd "$TRASH_DIRECTORY/full" &&
 181         git commit-graph verify 2>err &&
 182         test_must_be_empty err
 183 '
 184
 185 test_expect_success 'commit-graph verify force progress on for stderr' '
 186         cd "$TRASH_DIRECTORY/full" &&
 187         GIT_PROGRESS_DELAY=0 git commit-graph verify --progress 2>err &&
 188         test_file_not_empty err
 189 '
 190
 191 test_expect_success 'commit-graph verify with the --no-progress option' '
 192         cd "$TRASH_DIRECTORY/full" &&
 193         git commit-graph verify --no-progress 2>err &&
 194         test_must_be_empty err
 195 '
 196
 197 # Current graph structure:
 198 #
 199 #   __M3___
 200 #  /   |   \
 201 # 3 M1 5 M2 7
 202 # |/  \|/  \|
 203 # 2    4    6
 204 # |___/____/
 205 # 1
 206
 207 test_expect_success 'write graph with merges' '
 208         cd "$TRASH_DIRECTORY/full" &&
 209         git commit-graph write &&
 210         test_path_is_file $objdir/info/commit-graph &&
 211         graph_read_expect "10" "extra_edges"
 212 '
 213
 214 graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
 215 graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
 216 graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
 217
 218 test_expect_success 'Add one more commit' '
 219         cd "$TRASH_DIRECTORY/full" &&
 220         test_commit 8 &&
 221         git branch commits/8 &&
 222         ls $objdir/pack | grep idx >existing-idx &&
 223         git repack &&
 224         ls $objdir/pack| grep idx | grep -v -f existing-idx >new-idx
 225 '
 226
 227 # Current graph structure:
 228 #
 229 #      8
 230 #      |
 231 #   __M3___
 232 #  /   |   \
 233 # 3 M1 5 M2 7
 234 # |/  \|/  \|
 235 # 2    4    6
 236 # |___/____/
 237 # 1
 238
 239 graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
 240 graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
 241
 242 test_expect_success 'write graph with new commit' '
 243         cd "$TRASH_DIRECTORY/full" &&
 244         git commit-graph write &&
 245         test_path_is_file $objdir/info/commit-graph &&
 246         graph_read_expect "11" "extra_edges"
 247 '
 248
 249 graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
 250 graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
 251
 252 test_expect_success 'write graph with nothing new' '
 253         cd "$TRASH_DIRECTORY/full" &&
 254         git commit-graph write &&
 255         test_path_is_file $objdir/info/commit-graph &&
 256         graph_read_expect "11" "extra_edges"
 257 '
 258
 259 graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
 260 graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
 261
 262 test_expect_success 'build graph from latest pack with closure' '
 263         cd "$TRASH_DIRECTORY/full" &&
 264         cat new-idx | git commit-graph write --stdin-packs &&
 265         test_path_is_file $objdir/info/commit-graph &&
 266         graph_read_expect "9" "extra_edges"
 267 '
 268
 269 graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
 270 graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
 271
 272 test_expect_success 'build graph from commits with closure' '
 273         cd "$TRASH_DIRECTORY/full" &&
 274         git tag -a -m "merge" tag/merge merge/2 &&
 275         git rev-parse tag/merge >commits-in &&
 276         git rev-parse merge/1 >>commits-in &&
 277         cat commits-in | git commit-graph write --stdin-commits &&
 278         test_path_is_file $objdir/info/commit-graph &&
 279         graph_read_expect "6"
 280 '
 281
 282 graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
 283 graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
 284
 285 test_expect_success 'build graph from commits with append' '
 286         cd "$TRASH_DIRECTORY/full" &&
 287         git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
 288         test_path_is_file $objdir/info/commit-graph &&
 289         graph_read_expect "10" "extra_edges"
 290 '
 291
 292 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 293 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 294
 295 test_expect_success 'build graph using --reachable' '
 296         cd "$TRASH_DIRECTORY/full" &&
 297         git commit-graph write --reachable &&
 298         test_path_is_file $objdir/info/commit-graph &&
 299         graph_read_expect "11" "extra_edges"
 300 '
 301
 302 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 303 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 304
 305 test_expect_success 'setup bare repo' '
 306         cd "$TRASH_DIRECTORY" &&
 307         git clone --bare --no-local full bare &&
 308         cd bare &&
 309         git config core.commitGraph true &&
 310         baredir="./objects"
 311 '
 312
 313 graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
 314 graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2
 315
 316 test_expect_success 'write graph in bare repo' '
 317         cd "$TRASH_DIRECTORY/bare" &&
 318         git commit-graph write &&
 319         test_path_is_file $baredir/info/commit-graph &&
 320         graph_read_expect "11" "extra_edges"
 321 '
 322
 323 graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
 324 graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
 325
 326 test_expect_success 'perform fast-forward merge in full repo' '
 327         cd "$TRASH_DIRECTORY/full" &&
 328         git checkout -b merge-5-to-8 commits/5 &&
 329         git merge commits/8 &&
 330         git show-ref -s merge-5-to-8 >output &&
 331         git show-ref -s commits/8 >expect &&
 332         test_cmp expect output
 333 '
 334
 335 test_expect_success 'check that gc computes commit-graph' '
 336         cd "$TRASH_DIRECTORY/full" &&
 337         git commit --allow-empty -m "blank" &&
 338         git commit-graph write --reachable &&
 339         cp $objdir/info/commit-graph commit-graph-before-gc &&
 340         git reset --hard HEAD~1 &&
 341         git config gc.writeCommitGraph true &&
 342         git gc &&
 343         cp $objdir/info/commit-graph commit-graph-after-gc &&
 344         ! test_cmp_bin commit-graph-before-gc commit-graph-after-gc &&
 345         git commit-graph write --reachable &&
 346         test_cmp_bin commit-graph-after-gc $objdir/info/commit-graph
 347 '
 348
 349 test_expect_success 'replace-objects invalidates commit-graph' '
 350         cd "$TRASH_DIRECTORY" &&
 351         test_when_finished rm -rf replace &&
 352         git clone full replace &&
 353         (
 354                 cd replace &&
 355                 git commit-graph write --reachable &&
 356                 test_path_is_file .git/objects/info/commit-graph &&
 357                 git replace HEAD~1 HEAD~2 &&
 358                 git -c core.commitGraph=false log >expect &&
 359                 git -c core.commitGraph=true log >actual &&
 360                 test_cmp expect actual &&
 361                 git commit-graph write --reachable &&
 362                 git -c core.commitGraph=false --no-replace-objects log >expect &&
 363                 git -c core.commitGraph=true --no-replace-objects log >actual &&
 364                 test_cmp expect actual &&
 365                 rm -rf .git/objects/info/commit-graph &&
 366                 git commit-graph write --reachable &&
 367                 test_path_is_file .git/objects/info/commit-graph
 368         )
 369 '
 370
 371 test_expect_success 'commit grafts invalidate commit-graph' '
 372         cd "$TRASH_DIRECTORY" &&
 373         test_when_finished rm -rf graft &&
 374         git clone full graft &&
 375         (
 376                 cd graft &&
 377                 git commit-graph write --reachable &&
 378                 test_path_is_file .git/objects/info/commit-graph &&
 379                 H1=$(git rev-parse --verify HEAD~1) &&
 380                 H3=$(git rev-parse --verify HEAD~3) &&
 381                 echo "$H1 $H3" >.git/info/grafts &&
 382                 git -c core.commitGraph=false log >expect &&
 383                 git -c core.commitGraph=true log >actual &&
 384                 test_cmp expect actual &&
 385                 git commit-graph write --reachable &&
 386                 git -c core.commitGraph=false --no-replace-objects log >expect &&
 387                 git -c core.commitGraph=true --no-replace-objects log >actual &&
 388                 test_cmp expect actual &&
 389                 rm -rf .git/objects/info/commit-graph &&
 390                 git commit-graph write --reachable &&
 391                 test_path_is_missing .git/objects/info/commit-graph
 392         )
 393 '
 394
 395 test_expect_success 'replace-objects invalidates commit-graph' '
 396         cd "$TRASH_DIRECTORY" &&
 397         test_when_finished rm -rf shallow &&
 398         git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
 399         (
 400                 cd shallow &&
 401                 git commit-graph write --reachable &&
 402                 test_path_is_missing .git/objects/info/commit-graph &&
 403                 git fetch origin --unshallow &&
 404                 git commit-graph write --reachable &&
 405                 test_path_is_file .git/objects/info/commit-graph
 406         )
 407 '
 408
 409 # the verify tests below expect the commit-graph to contain
 410 # exactly the commits reachable from the commits/8 branch.
 411 # If the file changes the set of commits in the list, then the
 412 # offsets into the binary file will result in different edits
 413 # and the tests will likely break.
 414
 415 test_expect_success 'git commit-graph verify' '
 416         cd "$TRASH_DIRECTORY/full" &&
 417         git rev-parse commits/8 | git commit-graph write --stdin-commits &&
 418         git commit-graph verify >output
 419 '
 420
 421 NUM_COMMITS=9
 422 NUM_OCTOPUS_EDGES=2
 423 HASH_LEN="$(test_oid rawsz)"
 424 GRAPH_BYTE_VERSION=4
 425 GRAPH_BYTE_HASH=5
 426 GRAPH_BYTE_CHUNK_COUNT=6
 427 GRAPH_CHUNK_LOOKUP_OFFSET=8
 428 GRAPH_CHUNK_LOOKUP_WIDTH=12
 429 GRAPH_CHUNK_LOOKUP_ROWS=5
 430 GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
 431 GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 432                             1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 433 GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 434                              2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 435 GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 436                        $GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
 437 GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
 438 GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
 439 GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
 440 GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
 441 GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
 442 GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
 443 GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
 444 GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
 445 GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
 446 GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
 447 GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
 448 GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
 449 GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
 450 GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
 451                              $GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
 452 GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
 453 GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
 454
 455 corrupt_graph_setup() {
 456         cd "$TRASH_DIRECTORY/full" &&
 457         test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
 458         cp $objdir/info/commit-graph commit-graph-backup &&
 459         chmod u+w $objdir/info/commit-graph
 460 }
 461
 462 corrupt_graph_verify() {
 463         grepstr=$1
 464         test_must_fail git commit-graph verify 2>test_err &&
 465         grep -v "^+" test_err >err &&
 466         test_i18ngrep "$grepstr" err &&
 467         if test "$2" != "no-copy"
 468         then
 469                 cp $objdir/info/commit-graph commit-graph-pre-write-test
 470         fi &&
 471         git status --short &&
 472         GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD=true git commit-graph write &&
 473         chmod u+w $objdir/info/commit-graph &&
 474         git commit-graph verify
 475 }
 476
 477 # usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
 478 # Manipulates the commit-graph file at the position
 479 # by inserting the data, optionally zeroing the file
 480 # starting at <zero_pos>, then runs 'git commit-graph verify'
 481 # and places the output in the file 'err'. Test 'err' for
 482 # the given string.
 483 corrupt_graph_and_verify() {
 484         pos=$1
 485         data="${2:-\0}"
 486         grepstr=$3
 487         corrupt_graph_setup &&
 488         orig_size=$(wc -c < $objdir/info/commit-graph) &&
 489         zero_pos=${4:-${orig_size}} &&
 490         printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
 491         dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
 492         generate_zero_bytes $(($orig_size - $zero_pos)) >>"$objdir/info/commit-graph" &&
 493         corrupt_graph_verify "$grepstr"
 494
 495 }
 496
 497 test_expect_success POSIXPERM,SANITY 'detect permission problem' '
 498         corrupt_graph_setup &&
 499         chmod 000 $objdir/info/commit-graph &&
 500         corrupt_graph_verify "Could not open" "no-copy"
 501 '
 502
 503 test_expect_success 'detect too small' '
 504         corrupt_graph_setup &&
 505         echo "a small graph" >$objdir/info/commit-graph &&
 506         corrupt_graph_verify "too small"
 507 '
 508
 509 test_expect_success 'detect bad signature' '
 510         corrupt_graph_and_verify 0 "\0" \
 511                 "graph signature"
 512 '
 513
 514 test_expect_success 'detect bad version' '
 515         corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
 516                 "graph version"
 517 '
 518
 519 test_expect_success 'detect bad hash version' '
 520         corrupt_graph_and_verify $GRAPH_BYTE_HASH "\03" \
 521                 "hash version"
 522 '
 523
 524 test_expect_success 'detect low chunk count' '
 525         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\02" \
 526                 "missing the .* chunk"
 527 '
 528
 529 test_expect_success 'detect missing OID fanout chunk' '
 530         corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
 531                 "missing the OID Fanout chunk"
 532 '
 533
 534 test_expect_success 'detect missing OID lookup chunk' '
 535         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
 536                 "missing the OID Lookup chunk"
 537 '
 538
 539 test_expect_success 'detect missing commit data chunk' '
 540         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
 541                 "missing the Commit Data chunk"
 542 '
 543
 544 test_expect_success 'detect incorrect fanout' '
 545         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
 546                 "fanout value"
 547 '
 548
 549 test_expect_success 'detect incorrect fanout final value' '
 550         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
 551                 "fanout value"
 552 '
 553
 554 test_expect_success 'detect incorrect OID order' '
 555         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
 556                 "incorrect OID order"
 557 '
 558
 559 test_expect_success 'detect OID not in object database' '
 560         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
 561                 "from object database"
 562 '
 563
 564 test_expect_success 'detect incorrect tree OID' '
 565         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
 566                 "root tree OID for commit"
 567 '
 568
 569 test_expect_success 'detect incorrect parent int-id' '
 570         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
 571                 "invalid parent"
 572 '
 573
 574 test_expect_success 'detect extra parent int-id' '
 575         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
 576                 "is too long"
 577 '
 578
 579 test_expect_success 'detect wrong parent' '
 580         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
 581                 "commit-graph parent for"
 582 '
 583
 584 test_expect_success 'detect incorrect generation number' '
 585         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
 586                 "generation for commit"
 587 '
 588
 589 test_expect_success 'detect incorrect generation number' '
 590         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \
 591                 "non-zero generation number"
 592 '
 593
 594 test_expect_success 'detect incorrect commit date' '
 595         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
 596                 "commit date"
 597 '
 598
 599 test_expect_success 'detect incorrect parent for octopus merge' '
 600         corrupt_graph_and_verify $GRAPH_BYTE_OCTOPUS "\01" \
 601                 "invalid parent"
 602 '
 603
 604 test_expect_success 'detect invalid checksum hash' '
 605         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 606                 "incorrect checksum"
 607 '
 608
 609 test_expect_success 'detect incorrect chunk count' '
 610         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\377" \
 611                 "chunk lookup table entry missing" $GRAPH_CHUNK_LOOKUP_OFFSET
 612 '
 613
 614 test_expect_success 'git fsck (checks commit-graph)' '
 615         cd "$TRASH_DIRECTORY/full" &&
 616         git fsck &&
 617         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 618                 "incorrect checksum" &&
 619         cp commit-graph-pre-write-test $objdir/info/commit-graph &&
 620         test_must_fail git fsck
 621 '
 622
 623 test_expect_success 'setup non-the_repository tests' '
 624         rm -rf repo &&
 625         git init repo &&
 626         test_commit -C repo one &&
 627         test_commit -C repo two &&
 628         git -C repo config core.commitGraph true &&
 629         git -C repo rev-parse two | \
 630                 git -C repo commit-graph write --stdin-commits
 631 '
 632
 633 test_expect_success 'parse_commit_in_graph works for non-the_repository' '
 634         test-tool repository parse_commit_in_graph \
 635                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
 636         {
 637                 git -C repo log --pretty=format:"%ct " -1 &&
 638                 git -C repo rev-parse one
 639         } >expect &&
 640         test_cmp expect actual &&
 641
 642         test-tool repository parse_commit_in_graph \
 643                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
 644         git -C repo log --pretty="%ct" -1 one >expect &&
 645         test_cmp expect actual
 646 '
 647
 648 test_expect_success 'get_commit_tree_in_graph works for non-the_repository' '
 649         test-tool repository get_commit_tree_in_graph \
 650                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
 651         git -C repo rev-parse two^{tree} >expect &&
 652         test_cmp expect actual &&
 653
 654         test-tool repository get_commit_tree_in_graph \
 655                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
 656         git -C repo rev-parse one^{tree} >expect &&
 657         test_cmp expect actual
 658 '
 659
 660 test_expect_success 'corrupt commit-graph write (broken parent)' '
 661         rm -rf repo &&
 662         git init repo &&
 663         (
 664                 cd repo &&
 665                 empty="$(git mktree </dev/null)" &&
 666                 cat >broken <<-EOF &&
 667                 tree $empty
 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 "$broken" -m "good commit" "$empty" >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_expect_success 'corrupt commit-graph write (missing tree)' '
 683         rm -rf repo &&
 684         git init repo &&
 685         (
 686                 cd repo &&
 687                 tree="$(git mktree </dev/null)" &&
 688                 cat >broken <<-EOF &&
 689                 parent $ZERO_OID
 690                 author whatever <whatever@example.com> 1234 -0000
 691                 committer whatever <whatever@example.com> 1234 -0000
 692
 693                 broken commit
 694                 EOF
 695                 broken="$(git hash-object -w -t commit --literally broken)" &&
 696                 git commit-tree -p "$broken" -m "good" "$tree" >good &&
 697                 test_must_fail git commit-graph write --stdin-commits \
 698                         <good 2>test_err &&
 699                 test_i18ngrep "unable to parse commit" test_err
 700         )
 701 '
 702
 703 test_done