actions/example-cron: branch creation must not impact the default

actions/example-cron/run.sh

@@ -1,4 +1,20 @@
 forgejo-test-helper.sh push_workflow actions/example-$example $url root example-$example setup-forgejo $token
+
+#
+# Verify that creating a new branch with the same SHA as the default branch
+# does not change the ref associated with the schedule
+#
+# See https://codeberg.org/forgejo/forgejo/pulls/1941 for more information
+#
+function verify_ref() {
+    local ref=$(sqlite3 $DIR/forgejo-work-path/forgejo.db  'select ref from action_schedule')
+    test "${ref##*/}" = "main"
+}
+verify_ref
+api=$url/api/v1
+forgejo-curl.sh api_json --data '{"new_branch_name":"zzzz"}' $api/repos/root/example-cron/branches
+verify_ref
+
 # cron runs once per minute, give it three minutes max before declaring failure
 if ! RETRY_DELAYS="30 30 30 30 30 30" forgejo.sh retry test -f /srv/example-cron-volume/DONE ; then
     cat $FORGEJO_RUNNER_LOGS