graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
+test_expect_success 'build graph using --reachable' '
+ cd "$TRASH_DIRECTORY/full" &&
+ git commit-graph write --reachable &&
+ test_path_is_file $objdir/info/commit-graph &&
+ graph_read_expect "11" "large_edges"
+'
+
+graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
+graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
+
test_expect_success 'setup bare repo' '
cd "$TRASH_DIRECTORY" &&
git clone --bare --no-local full bare &&
test_cmp expect output
'
+test_expect_success 'check that gc computes commit-graph' '
+ cd "$TRASH_DIRECTORY/full" &&
+ git commit --allow-empty -m "blank" &&
+ git commit-graph write --reachable &&
+ cp $objdir/info/commit-graph commit-graph-before-gc &&
+ git reset --hard HEAD~1 &&
+ git config gc.writeCommitGraph true &&
+ git gc &&
+ cp $objdir/info/commit-graph commit-graph-after-gc &&
+ ! test_cmp commit-graph-before-gc commit-graph-after-gc &&
+ git commit-graph write --reachable &&
+ test_cmp commit-graph-after-gc $objdir/info/commit-graph
+'
+
# the verify tests below expect the commit-graph to contain
# exactly the commits reachable from the commits/8 branch.
# If the file changes the set of commits in the list, then the
git commit-graph verify >output
'
+NUM_COMMITS=9
+NUM_OCTOPUS_EDGES=2
HASH_LEN=20
GRAPH_BYTE_VERSION=4
GRAPH_BYTE_HASH=5
GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
+GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
+GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
+GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
+GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
+GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
+GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
+GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
+GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
+GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
+GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
+ $GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
+GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
+GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
# usage: corrupt_graph_and_verify <position> <data> <string>
# Manipulates the commit-graph file at the position
"incorrect OID order"
'
+test_expect_success 'detect OID not in object database' '
+ corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
+ "from object database"
+'
+
+test_expect_success 'detect incorrect tree OID' '
+ corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
+ "root tree OID for commit"
+'
+
+test_expect_success 'detect incorrect parent int-id' '
+ corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
+ "invalid parent"
+'
+
+test_expect_success 'detect extra parent int-id' '
+ corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
+ "is too long"
+'
+
+test_expect_success 'detect wrong parent' '
+ corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
+ "commit-graph parent for"
+'
+
+test_expect_success 'detect incorrect generation number' '
+ corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
+ "generation for commit"
+'
+
+test_expect_success 'detect incorrect generation number' '
+ corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \
+ "non-zero generation number"
+'
+
+test_expect_success 'detect incorrect commit date' '
+ corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
+ "commit date"
+'
+
+test_expect_success 'detect incorrect parent for octopus merge' '
+ corrupt_graph_and_verify $GRAPH_BYTE_OCTOPUS "\01" \
+ "invalid parent"
+'
+
+test_expect_success 'detect invalid checksum hash' '
+ corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
+ "incorrect checksum"
+'
+
+test_expect_success 'git fsck (checks commit-graph)' '
+ cd "$TRASH_DIRECTORY/full" &&
+ git fsck &&
+ corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
+ "incorrect checksum" &&
+ test_must_fail git fsck
+'
+
+test_expect_success 'setup non-the_repository tests' '
+ rm -rf repo &&
+ git init repo &&
+ test_commit -C repo one &&
+ test_commit -C repo two &&
+ git -C repo config core.commitGraph true &&
+ git -C repo rev-parse two | \
+ git -C repo commit-graph write --stdin-commits
+'
+
+test_expect_success 'parse_commit_in_graph works for non-the_repository' '
+ test-tool repository parse_commit_in_graph \
+ repo/.git repo "$(git -C repo rev-parse two)" >actual &&
+ echo $(git -C repo log --pretty="%ct" -1) \
+ $(git -C repo rev-parse one) >expect &&
+ test_cmp expect actual &&
+
+ test-tool repository parse_commit_in_graph \
+ repo/.git repo "$(git -C repo rev-parse one)" >actual &&
+ echo $(git -C repo log --pretty="%ct" -1 one) >expect &&
+ test_cmp expect actual
+'
+
+test_expect_success 'get_commit_tree_in_graph works for non-the_repository' '
+ test-tool repository get_commit_tree_in_graph \
+ repo/.git repo "$(git -C repo rev-parse two)" >actual &&
+ echo $(git -C repo rev-parse two^{tree}) >expect &&
+ test_cmp expect actual &&
+
+ test-tool repository get_commit_tree_in_graph \
+ repo/.git repo "$(git -C repo rev-parse one)" >actual &&
+ echo $(git -C repo rev-parse one^{tree}) >expect &&
+ test_cmp expect actual
+'
+
test_done