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https://bugzilla.mozilla.org/show_bug.cgi?id=650295
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  <title>Test for Bug 650295 -- Spin the event loop from inside a callback</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=650295">Mozilla Bug 650295</a>
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<pre id="test">
<script type="text/javascript">
  SimpleTest.waitForExplicitFinish();

  /*
   * SpecialPowers.spinEventLoop can be used to spin the event loop, causing
   * queued SpeechEvents (such as those created by calls to start(), stop()
   * or abort()) to be processed immediately.
   * When this is done from inside DOM event handlers, it is possible to
   * cause reentrancy in our C++ code, which we should be able to withstand.
   */
  function abortAndSpinEventLoop(evt, sr) {
    sr.abort();
    SpecialPowers.spinEventLoop(window);
  }
  function doneFunc() {
    // Trigger gc now and wait some time to make sure this test gets the blame
    // for any assertions caused by spinning the event loop.
    //
    // NB - The assertions should be gone, but this looks too scary to touch
    // during batch cleanup.
    var count = 0, GC_COUNT = 4;

    function triggerGCOrFinish() {
      SpecialPowers.gc();
      count++;

      if (count == GC_COUNT) {
        SimpleTest.finish();
      }
    }

    for (var i = 0; i < GC_COUNT; i++) {
      setTimeout(triggerGCOrFinish, 0);
    }
  }

  /*
   * We start by performing a normal start, then abort from the audiostart
   * callback and force the EVENT_ABORT to be processed while still inside
   * the event handler. This causes the recording to stop, which raises
   * the audioend and (later on) end events.
   * Then, we abort (once again spinning the event loop) from the audioend
   * handler, attempting to cause a re-entry into the abort code. This second
   * call should be ignored, and we get the end callback and finish.
   */

  performTest({
    eventsToRequest: [],
    expectedEvents: {
      "audiostart": abortAndSpinEventLoop,
      "audioend": abortAndSpinEventLoop,
      "end": null
    },
    doneFunc,
    prefs: [["media.webspeech.test.fake_fsm_events", true],
            ["media.webspeech.test.fake_recognition_service", true],
            ["media.webspeech.recognition.timeout", 100000]]
  });

</script>
</pre>
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