test_event_listener_leaks.html

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<!DOCTYPE HTML>

<html>

<head>

  <title>Bug 1450358 - Test IDB 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 IDB objects in the frame's context.

// 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.

let count = 0;

async function useIDB(contentWindow) {

  count += 1;

  let db = await new Promise(resolve => {

    let r = contentWindow.indexedDB.open("idb-leak-test-" + count, 1.0);

    r.onupgradeneeded = evt => {

      evt.target.result.createObjectStore("looped");

};

    r.onsuccess = evt => {

      resolve(evt.target.result);

};

});

  let tx = db.transaction("looped", "readwrite");

  let store = tx.objectStore("looped");

  function spin() {

    contentWindow.spinCount += 1;

    store.get(0).onsuccess = spin;

  store.put(0, "purgatory").onsuccess = () => {

    contentWindow.putCount += 1;

    spin();

};

async function runTest() {

  try {

    await checkForEventListenerLeaks("IDB", useIDB);

  } catch (e) {

    ok(false, e);

  } finally {

    SimpleTest.finish();

SimpleTest.waitForExplicitFinish();

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

</script>

</pre>

</body>

</html>