iframe-inheritance-document-write.html

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This WPT test may be referenced by the following Test IDs:
- /referrer-policy/generic/inheritance/iframe-inheritance-document-write.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>Referrer Policy: iframes with document.write()</title>

<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">

<div id="log"></div>

<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_of_srcdoc_iframe = reportedReferrer();

    const script_to_fetch_cross_origin_resource =

          createScriptString(get_host_info().REMOTE_ORIGIN, location.origin + "/custom");

    iframe.srcdoc = `<head><meta name="referrer" content="unsafe-url"></head>`

      + script_to_fetch_cross_origin_resource;

    document.body.appendChild(iframe);

    assert_equals(await referrer_of_srcdoc_iframe, self.origin + "/custom",

                  "Srcdoc iframe setting referrer policy via meta header should use that referrer policy.");

    let referrer_after_document_open = reportedReferrer();

    iframe.contentDocument.open();

    iframe.contentDocument.write(script_to_fetch_cross_origin_resource);

    iframe.contentDocument.close();

    assert_equals(await referrer_after_document_open, self.origin + "/custom",

                  "Referrer policy should not change after document.open().");

  }, "document.open() should not change the referrer policy of the opened document.");

</script>