feat: restore source parity and harden agent runtime

backend-fastapi/online_dev/report_manager/engine/test_watermark.py

@@ -0,0 +1,36 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+from datetime import datetime
+
+from online_dev.report_manager.engine.watermark import (
+    build_watermark_payload,
+    resolve_watermark_config,
+)
+
+
+def test_resolve_show_time():
+    fixed = datetime(2026, 5, 22, 15, 30, 0)
+    cfg = resolve_watermark_config(
+        {"content": "机密", "showTime": True, "timeFormat": "yyyy-MM-dd"},
+        now=fixed,
+    )
+    assert cfg["content"] == "机密 2026-05-22"
+
+
+def test_build_payload_disabled():
+    payload = build_watermark_payload(False, {"content": "x"})
+    assert payload["show"] is False
+    assert payload["config"] == {}
+
+
+def test_build_payload_enabled():
+    payload = build_watermark_payload(True, {"content": "ZQ"}, template_name="报表A")
+    assert payload["show"] is True
+    assert payload["config"]["content"] == "ZQ"
+
+
+if __name__ == "__main__":
+    test_resolve_show_time()
+    test_build_payload_disabled()
+    test_build_payload_enabled()
+    print("ok")