mozilla-release/testing/web-platform/tests/content-security-policy/script-src/eval-allowed-in-report-only-mode-and-sends-report.html

<html>
<head>
  <script src="/resources/testharness.js"></script>
  <script src="/resources/testharnessreport.js"></script>
  <!-- Content-Security-Policy-Report-Only: script-src 'unsafe-inline'; report-uri ../support/report.py?op=put&reportID={{$id}} -->
</head>
<body>
  <script>
    var t = async_test("Eval is allowed because the CSP is report-only");
    try {
      eval("t.done()");
    } catch {
      t.step(function() { assert_true(false, "The eval should have execute succesfully"); })
    }
  </script>

  <script async defer src="../support/checkReport.sub.js?reportField=violated-directive&reportValue=script-src%20%27unsafe-inline%27"></script>
</body>
</html>