<!DOCTYPE html>
<body>
  <script src=/resources/testharness.js></script>
  <script src=/resources/testharnessreport.js></script>
  <script>
    async_test(t => {
      // opaque-origin1.html navigates itself to opaque-origin2.html onload.
      // The 'src' shorthand in allow="fullscreen 'src'" should only match
      // the initial src of opaque-origin1.html. opaque-origin2.html
      // should not get access to fullscreen.
      const iframe = document.createElement('iframe');
      iframe.sandbox = 'allow-scripts';
      iframe.src = 'resources/opaque-origin1.sub.https.html';
      iframe.allow = "fullscreen 'src'";

      window.addEventListener('message', t.step_func_done(e => {
        assert_equals(e.data, "fullscreen disabled in opaque-origin2.html");
      }));

      document.body.appendChild(iframe);
    });
  </script>
</body>
