verify_notes z
'
+cp expect_notes_y expect_notes_m
+cp expect_log_y expect_log_m
+
+test_expect_success 'redo merge of z into m (== y) with default ("manual") resolver => Conflicting 3-way merge' '
+ git update-ref refs/notes/m refs/notes/y &&
+ test_must_fail git notes merge z >output &&
+ # Output should point to where to resolve conflicts
+ grep -q "\\.git/NOTES_MERGE_WORKTREE" output &&
+ # Inspect merge conflicts
+ ls .git/NOTES_MERGE_WORKTREE >output_conflicts &&
+ test_cmp expect_conflicts output_conflicts &&
+ ( for f in $(cat expect_conflicts); do
+ test_cmp "expect_conflict_$f" ".git/NOTES_MERGE_WORKTREE/$f" ||
+ exit 1
+ done ) &&
+ # Verify that current notes tree (pre-merge) has not changed (m == y)
+ verify_notes y &&
+ verify_notes m &&
+ test "$(git rev-parse refs/notes/m)" = "$(cat pre_merge_y)"
+'
+
+cp expect_notes_w expect_notes_m
+cp expect_log_w expect_log_m
+
+test_expect_success 'reset notes ref m to somewhere else (w)' '
+ git update-ref refs/notes/m refs/notes/w &&
+ verify_notes m &&
+ test "$(git rev-parse refs/notes/m)" = "$(git rev-parse refs/notes/w)"
+'
+
+test_expect_success 'fail to finalize conflicting merge if underlying ref has moved in the meantime (m != NOTES_MERGE_PARTIAL^1)' '
+ # Resolve conflicts
+ cat >.git/NOTES_MERGE_WORKTREE/$commit_sha1 <<EOF &&
+y and z notes on 1st commit
+EOF
+ cat >.git/NOTES_MERGE_WORKTREE/$commit_sha4 <<EOF &&
+y and z notes on 4th commit
+EOF
+ # Fail to finalize merge
+ test_must_fail git notes merge --commit >output 2>&1 &&
+ # .git/NOTES_MERGE_* must remain
+ test -f .git/NOTES_MERGE_PARTIAL &&
+ test -f .git/NOTES_MERGE_REF &&
+ test -f .git/NOTES_MERGE_WORKTREE/$commit_sha1 &&
+ test -f .git/NOTES_MERGE_WORKTREE/$commit_sha2 &&
+ test -f .git/NOTES_MERGE_WORKTREE/$commit_sha3 &&
+ test -f .git/NOTES_MERGE_WORKTREE/$commit_sha4 &&
+ # Refs are unchanged
+ test "$(git rev-parse refs/notes/m)" = "$(git rev-parse refs/notes/w)"
+ test "$(git rev-parse refs/notes/y)" = "$(git rev-parse NOTES_MERGE_PARTIAL^1)"
+ test "$(git rev-parse refs/notes/m)" != "$(git rev-parse NOTES_MERGE_PARTIAL^1)"
+ # Mention refs/notes/m, and its current and expected value in output
+ grep -q "refs/notes/m" output &&
+ grep -q "$(git rev-parse refs/notes/m)" output &&
+ grep -q "$(git rev-parse NOTES_MERGE_PARTIAL^1)" output &&
+ # Verify that other notes refs has not changed (w, x, y and z)
+ verify_notes w &&
+ verify_notes x &&
+ verify_notes y &&
+ verify_notes z
+'
+
+test_expect_success 'resolve situation by aborting the notes merge' '
+ git notes merge --abort &&
+ # No .git/NOTES_MERGE_* files left
+ test_must_fail ls .git/NOTES_MERGE_* >output 2>/dev/null &&
+ test_cmp /dev/null output &&
+ # m has not moved (still == w)
+ test "$(git rev-parse refs/notes/m)" = "$(git rev-parse refs/notes/w)"
+ # Verify that other notes refs has not changed (w, x, y and z)
+ verify_notes w &&
+ verify_notes x &&
+ verify_notes y &&
+ verify_notes z
+'
+
test_done