cobalt/black_box_tests/testdata/service_worker_csp_test.html

<!DOCTYPE html>
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<head>
  <title>Verify that service worker registration correctly follow CSP</title>
  <script src='black_box_js_test_utils.js'></script>
</head>

<body>
  <script>
  h5vcc.storage.clearServiceWorkerCache();

  var window_onerror_count = 0;
  window.onerror = (message, filename, lineno, colno, error) => {
    ++window_onerror_count;
    // Note: Worker execution errors currently don't pass line or column
    // number in the error message.
    assertIncludes('SecurityError', message);
    assertIncludes('worker_csp_test.js', filename);
  }

  // This worker attempts to do an XHR request that is blocked by CSP.
  navigator.serviceWorker.register(
    'worker_csp_test.js', { scope: './' })
    .then(registration => {
      notReached();
    })
    .catch(error => {
      console.log(`Registration failed: ${error}`);
      assertIncludes('TypeError', error);
    });

  window.setTimeout(
    () => {
      assertEqual(0, window_onerror_count);
      onEndTest();
    }, 250);
  </script>
</body>