test_eventsource_event_listener_leaks.html

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<!DOCTYPE HTML>

<html>

<head>

  <title>Bug 1450358 - Test EventSource event listener leak conditions</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <script type="text/javascript" src="/tests/dom/events/test/event_leak_utils.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

</head>

<body>

<script class="testbody" type="text/javascript">

// Manipulate EventSource.  Its important here that we create a

// listener callback from the DOM objects back to the frame's global

// in order to exercise the leak condition.

async function useEventSource(contentWindow) {

  let es = new contentWindow.EventSource("delayedServerEvents.sjs");

  es.onmessage = _ => {

    contentWindow.messageCount += 1;

};

async function runTest() {

  try {

    await checkForEventListenerLeaks("EventSource", useEventSource);

  } catch (e) {

    ok(false, e);

  } finally {

    SimpleTest.finish();

SimpleTest.waitForExplicitFinish();

addEventListener("load", runTest, { once: true });

</script>

</pre>

</body>

</html>