test_cmp expect_non-note3 actual
'
+
+# Change the notes for the three top commits
+test_tick
+cat >input <<INPUT_END
+commit refs/notes/many_notes
+committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+data <<COMMIT
+changing notes for the top three commits
+COMMIT
+from refs/notes/many_notes^0
+INPUT_END
+
+rm expect
+i=$num_commits
+j=0
+while test $j -lt 3
+do
+ cat >>input <<INPUT_END
+N inline refs/heads/many_commits~$j
+data <<EOF
+changed note for commit #$i
+EOF
+INPUT_END
+ cat >>expect <<EXPECT_END
+ commit #$i
+ changed note for commit #$i
+EXPECT_END
+ i=$(($i - 1))
+ j=$(($j + 1))
+done
+
+test_expect_success 'change a few existing notes' '
+
+ git fast-import <input &&
+ GIT_NOTES_REF=refs/notes/many_notes git log -n3 refs/heads/many_commits |
+ grep "^ " > actual &&
+ test_cmp expect actual
+
+'
+
+test_expect_success 'verify that changing notes respect existing fanout' '
+
+ # None of the entries in the top-level notes tree should be a full SHA1
+ git ls-tree --name-only refs/notes/many_notes |
+ while read path
+ do
+ if test $(expr length "$path") -ge 40
+ then
+ return 1
+ fi
+ done
+
+'
+
remaining_notes=10
test_tick
-cat >>input <<INPUT_END
+cat >input <<INPUT_END
commit refs/notes/many_notes
committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
data <<COMMIT
from refs/notes/many_notes^0
INPUT_END
-i=$remaining_notes
-while test $i -lt $num_commits
+i=$(($num_commits - $remaining_notes))
+for sha1 in $(git rev-list -n $i refs/heads/many_commits)
do
- i=$(($i + 1))
cat >>input <<INPUT_END
-N 0000000000000000000000000000000000000000 :$i
+N 0000000000000000000000000000000000000000 $sha1
INPUT_END
done