mozilla-release/testing/web-platform/tests/content-security-policy/navigate-to/meta-refresh-cross-origin-blocked.sub.html

<!DOCTYPE html>

<head>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>

<body>
<script>
  var t = async_test("Test that the child iframe navigation is not allowed");
  window.onmessage = t.step_func_done(function(e) {
    assert_equals(e.data.result, 'fail');
    assert_equals(e.data.violatedDirective, 'navigate-to');
  });
</script>

<iframe src="support/meta_refresh_navigation.sub.html?csp=navigate-to%20%27self%27&report_id={{$id:uuid()}}&target=http%3A%2F%2F{{domains[www1]}}:{{ports[http][0]}}%2Fcontent-security-policy%2Fnavigate-to%2Fsupport%2Fpost_message_to_frame_owner.html"></iframe>

<script async defer src='../support/checkReport.sub.js?reportField=violated-directive&reportValue=navigate-to%20%27self%27&reportID={{$id}}'></script>
</body>