test_paris_weakmap_keys.html

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<!DOCTYPE HTML>

<html>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=777385

-->

<head>

  <meta charset="utf-8">

  <title>Tests for WebIDL objects as weak map keys</title>

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

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

  <script type="application/javascript">

  /** Test for Bug 777385 **/

  SimpleTest.waitForExplicitFinish();

  // We wait to run this until the load event because it needs to access an element.

  function go() {

  let live_map = new WeakMap;

  let get_div_style = function () {

    return document.getElementById("mydivname").style;

  let make_live_map = function () {

    let my_div_style = get_div_style();

    let div_fail = false;

    try {

      live_map.set(my_div_style, 12345);

    } catch (e) {

      div_fail = true;

    ok(!div_fail, "Using elem.style as a weak map key should not produce an exception.");

    is(live_map.get(get_div_style()), 12345, "Live map should have live style with right value before GC.");

  make_live_map();

  let tf = new TestFunctions;

  let add_non_isupports2 = function () {

    let testKey = tf.wrapperCachedNonISupportsObject;

    let testFail = false;

    try {

      live_map.set(testKey, 23456);

    } catch (e) {

      testFail = true;

    ok(!testFail, "Using a wrapper cached non-nsISupports class as a weak map key should not produce an exception.");

    is(live_map.get(testKey), 23456, "Live map should have wrapper cached non-nsISupports class right value before GC.");

  add_non_isupports2();

  /* Set up for running precise GC/CC then check the results. */

  SpecialPowers.exactGC(function () {

    SpecialPowers.forceCC();

    SpecialPowers.forceGC();

    SpecialPowers.forceGC();

    is(SpecialPowers.nondeterministicGetWeakMapKeys(live_map).length, 2,

       "Live WebIDL bindings keys should not be removed from a weak map.");

    is(live_map.get(get_div_style()), 12345, "Live weak map should have live style with right value after GC.");

    is(live_map.get(tf.wrapperCachedNonISupportsObject), 23456,

       "Live weak map should have live wrapper cached non-nsISupports class with right value after GC.");

    SimpleTest.finish();

});

  SimpleTest.waitForExplicitFinish();

  addLoadEvent(function() {

    SpecialPowers.pushPrefEnv({set: [['dom.expose_test_interfaces', true]]},

                              go);

});

  </script>

</head>

<div></div>

<div id="mydivname"></div>

<body>

<p id="display"></p>

</body>

</html>