cobalt/black_box_tests/testdata/worker_csp_test.html

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<head>
  <title>Verify that XHR on workers correctly follows CSP</title>
  <script src='black_box_js_test_utils.js'></script>
</head>

<body>
  <script>
    var worker;
    var window_onerror_count = 0;
    var worker_onerror_count = 0;
    window.onerror = (message, filename, lineno, colno, error) => {
      ++window_onerror_count;
      console.log('window got onerror', message);
      notReached();
    }

    // This worker attempts to do an XHR request that is blocked by CSP.
    worker = new Worker('worker_csp_test.js');
    worker.onmessage = function (event) {
      console.log('worker got onmessage', event.data);
      notReached();
    };
    worker.onerror = function (event) {
      ++worker_onerror_count;
      console.log('worker got onerror', event.message);
      // Note: Worker execution errors currently don't pass line or column
      // number in the error message.
      assertIncludes('SecurityError', event.message);
      assertIncludes('worker_csp_test.js', event.filename);
      assertEqual(1, worker_onerror_count);
      window.setTimeout(
        () => {
          assertEqual(1, worker_onerror_count);
          assertEqual(0, window_onerror_count);
          worker.terminate();
          onEndTest();
        }, 250);
    };

  </script>
</body>