gecko-dev/dom/workers/test/test_recursion.html

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  http://creativecommons.org/publicdomain/zero/1.0/
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<!DOCTYPE HTML>
<html>
<!--
Tests of DOM Worker Threads
-->
<head>
  <title>Test for DOM Worker Threads Recursion</title>
  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<p id="display"></p>
<div id="content" style="display: none">

</div>
<pre id="test">
<script class="testbody" type="text/javascript">

  const testCount = 2;
  var errorCount = 0;

  var worker = new Worker("recursion_worker.js");

  function done() {
    worker.terminate();
    SimpleTest.finish();
  }

  worker.onmessage = function(event) {
    if (event.data == "Done") {
      ok(true, "correct message");
    }
    else {
      ok(false, "Bad message: " + event.data);
    }
    done();
  }

  worker.onerror = function(event) {
    event.preventDefault();
    if (event.message == "too much recursion") {
      ok(true, "got correct error message");
      ++errorCount;
    }
    else {
      ok(false, "got bad error message: " + event.message);
      done();
    }
  }

  for (var i = 0; i < testCount; i++) {
    worker.postMessage("");
  }

  SimpleTest.waitForExplicitFinish();

</script>
</pre>
</body>
</html>