<!DOCTYPE html>
<html>
  <head>
    <title>Referrer Policy: iframes srdoc correctly inherit the ancestor's referrer policy</title>
    <link rel="help" href="https://www.w3.org/TR/referrer-policy/#referrer-policy-delivery-nested">
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
    <script src="/common/get-host-info.sub.js"></script>
    <script src="resources/make-html-script.js"></script>
    <meta name="referrer" content="origin">
  </head>
  <body>
    <h1>Referrer Policy: iframes srcdoc correctly inherit the ancestor's referrer policy</h1>
    <script>
      let reportedReferrer = () => {
        return new Promise(resolve => {
          window.addEventListener("message", msg => resolve(msg.data.referrer));
        });
      };

      const iframe = document.createElement("iframe");

      promise_test(async t => {
        let referrer = reportedReferrer();
        iframe.srcdoc = createScriptString(get_host_info().REMOTE_ORIGIN,
                                           location.origin + "/custom");
        document.body.appendChild(iframe);
        assert_equals(await referrer, self.origin + "/",
                      "Referrer policy should be inherited from parent.");

        let meta = document.createElement('meta');
        meta.name = "referrer";
        meta.content = "unsafe-url";
        document.head.appendChild(meta);
        iframe.contentWindow.postMessage('checkReferrer');
        assert_equals(
          await reportedReferrer(), self.origin + "/",
          "Changing parent's referrer policy has no effect on the child.");

      }, "Srcdoc iframe inherits referrer policy from parent on creation.");

    </script>
    <div id="log"></div>
  </body>
</html>
