t6043: fix copied test description to match its purpose

diff --git a/t/t5318-commit-graph.sh b/t/t5318-commit-graph.sh
index 2799969f3e2a15fc636ed042c96d8a846e01ebe8..561796f2809c38d3b5229abd4359f5b72141839e 100755 (executable)
--- a/t/t5318-commit-graph.sh
+++ b/t/t5318-commit-graph.sh
@@ -8,7 +8,8 @@ test_expect_success 'setup full repo' '
        cd "$TRASH_DIRECTORY/full" &&
        git init &&
        git config core.commitGraph true &&
-       objdir=".git/objects"
+       objdir=".git/objects" &&
+       test_oid_init
 '
 
 test_expect_success 'verify graph with no graph file' '
@@ -35,7 +36,7 @@ test_expect_success 'create commits and repack' '
 graph_git_two_modes() {
        git -c core.commitGraph=true $1 >output
        git -c core.commitGraph=false $1 >expect
-       test_cmp output expect
+       test_cmp expect output
 }
 
 graph_git_behavior() {
@@ -121,7 +122,7 @@ test_expect_success 'write graph with merges' '
        cd "$TRASH_DIRECTORY/full" &&
        git commit-graph write &&
        test_path_is_file $objdir/info/commit-graph &&
-       graph_read_expect "10" "large_edges"
+       graph_read_expect "10" "extra_edges"
 '
 
 graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
@@ -156,7 +157,7 @@ test_expect_success 'write graph with new commit' '
        cd "$TRASH_DIRECTORY/full" &&
        git commit-graph write &&
        test_path_is_file $objdir/info/commit-graph &&
-       graph_read_expect "11" "large_edges"
+       graph_read_expect "11" "extra_edges"
 '
 
 graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
@@ -166,7 +167,7 @@ test_expect_success 'write graph with nothing new' '
        cd "$TRASH_DIRECTORY/full" &&
        git commit-graph write &&
        test_path_is_file $objdir/info/commit-graph &&
-       graph_read_expect "11" "large_edges"
+       graph_read_expect "11" "extra_edges"
 '
 
 graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
@@ -176,7 +177,7 @@ test_expect_success 'build graph from latest pack with closure' '
        cd "$TRASH_DIRECTORY/full" &&
        cat new-idx | git commit-graph write --stdin-packs &&
        test_path_is_file $objdir/info/commit-graph &&
-       graph_read_expect "9" "large_edges"
+       graph_read_expect "9" "extra_edges"
 '
 
 graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
@@ -199,7 +200,7 @@ test_expect_success 'build graph from commits with append' '
        cd "$TRASH_DIRECTORY/full" &&
        git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
        test_path_is_file $objdir/info/commit-graph &&
-       graph_read_expect "10" "large_edges"
+       graph_read_expect "10" "extra_edges"
 '
 
 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
@@ -209,7 +210,7 @@ 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_read_expect "11" "extra_edges"
 '
 
 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
@@ -230,7 +231,7 @@ test_expect_success 'write graph in bare repo' '
        cd "$TRASH_DIRECTORY/bare" &&
        git commit-graph write &&
        test_path_is_file $baredir/info/commit-graph &&
-       graph_read_expect "11" "large_edges"
+       graph_read_expect "11" "extra_edges"
 '
 
 graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
@@ -333,7 +334,7 @@ test_expect_success 'git commit-graph verify' '
 
 NUM_COMMITS=9
 NUM_OCTOPUS_EDGES=2
-HASH_LEN=20
+HASH_LEN="$(test_oid rawsz)"
 GRAPH_BYTE_VERSION=4
 GRAPH_BYTE_HASH=5
 GRAPH_BYTE_CHUNK_COUNT=6
@@ -365,9 +366,10 @@ GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
 GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
 GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
 
-# usage: corrupt_graph_and_verify <position> <data> <string>
+# usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
 # Manipulates the commit-graph file at the position
-# by inserting the data, then runs 'git commit-graph verify'
+# by inserting the data, optionally zeroing the file
+# starting at <zero_pos>, then runs 'git commit-graph verify'
 # and places the output in the file 'err'. Test 'err' for
 # the given string.
 corrupt_graph_and_verify() {
@@ -375,11 +377,15 @@ corrupt_graph_and_verify() {
        data="${2:-\0}"
        grepstr=$3
        cd "$TRASH_DIRECTORY/full" &&
+       orig_size=$(wc -c < $objdir/info/commit-graph) &&
+       zero_pos=${4:-${orig_size}} &&
        test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
        cp $objdir/info/commit-graph commit-graph-backup &&
        printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
+       dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
+       generate_zero_bytes $(($orig_size - $zero_pos)) >>"$objdir/info/commit-graph" &&
        test_must_fail git commit-graph verify 2>test_err &&
-       grep -v "^+" test_err >err
+       grep -v "^+" test_err >err &&
        test_i18ngrep "$grepstr" err
 }
 
@@ -483,6 +489,11 @@ test_expect_success 'detect invalid checksum hash' '
                "incorrect checksum"
 '
 
+test_expect_success 'detect incorrect chunk count' '
+       corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\377" \
+               "chunk lookup table entry missing" $GRAPH_CHUNK_LOOKUP_OFFSET
+'
+
 test_expect_success 'git fsck (checks commit-graph)' '
        cd "$TRASH_DIRECTORY/full" &&
        git fsck &&