1 files changed, 27 insertions, 0 deletions
diff --git a/dom/serviceworkers/test/page_post_controlled.html b/dom/serviceworkers/test/page_post_controlled.html
new file mode 100644
index 0000000000..27694c0027
--- /dev/null
+++ b/dom/serviceworkers/test/page_post_controlled.html
@@ -0,0 +1,27 @@
+<!--
+  Any copyright is dedicated to the Public Domain.
+  http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+</head>
+<body>
+<script type="text/javascript">
+  window.parent.postMessage({
+    controlled: !!navigator.serviceWorker.controller
+  }, "*");
+
+  addEventListener("message", e => {
+    if (e.data == "create nested iframe") {
+      const iframe = document.createElement('iframe');
+      document.body.appendChild(iframe);
+      iframe.src = location.href;
+    } else {
+      window.parent.postMessage(e.data, "*");
+    }
+  });
+</script>
+</body>
+</html>