content-security-policy/inheritance/frame-src-javascript-url.html

<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<meta http-equiv="Content-Security-Policy" content="frame-src 'none'">

<script>
  const iframe_url = new URL("./support/empty.html", location.href);

  // Regression test for: https://crbug.com/1064676
  promise_test(async (t) => {
    await new Promise(r => window.onload = r);

    let url = `javascript:

      window.addEventListener('securitypolicyviolation', e => {
        parent.postMessage({
          originalPolicy: e.originalPolicy,
          blockedURI: e.blockedURI,
        });
      });

      let iframe = document.createElement('iframe');
      iframe.src = '${iframe_url}';
      document.body.appendChild(iframe);

    `;

    let iframe = document.createElement('iframe');
    iframe.src = encodeURI(url.replace(/\n/g, ""));

    let violation = new Promise(r => window.addEventListener("message", r));
    document.body.appendChild(iframe);
    let {data} = await violation;

    assert_equals(data.originalPolicy, "frame-src 'none'");
    assert_equals(data.blockedURI, iframe_url.toString());

  }, "<iframe src='javascript:...'>'s inherits policy (dynamically inserted <iframe> is blocked)");

</script>