test stream hot reload

t/cli/test_prometheus_reload.sh

@@ -91,3 +91,31 @@ if curl -i http://127.0.0.1:9091/apisix/prometheus/metrics | grep "{}" > /dev/nu
     echo "failed: metrics should not contain '{}' when prometheus is enabled"
     exit 1
 fi
+
+echo "disable http prometheus and enable stream prometheus and call reload"
+
+exit_if_not_customed_nginx
+
+echo "
+apisix:
+    proxy_mode: http&stream
+    enable_admin: true
+    stream_proxy:
+        tcp:
+            - addr: 9100
+plugins:
+    - example-plugin
+stream_plugins:
+    - prometheus
+" > conf/config.yaml
+
+curl -i http://127.0.0.1:9090/v1/plugins/reload -XPUT
+
+sleep 2
+
+echo "fetching metrics should actually work demonstrating hot reload"
+
+if ! curl -i http://127.0.0.1:9091/apisix/prometheus/metrics | grep "{}" > /dev/null; then
+    echo "failed: metrics should not contain '{}' when prometheus is enabled"
+    exit 1
+fi