js/xpconnect/tests/chrome/test_getweakmapkeys.xul
author Bobby Holley <bobbyholley@gmail.com>
Fri, 14 Oct 2011 10:52:47 -0700
changeset 78738 51541b56d20d588edc5a6111d670ca5af3db39d5
parent 78706 js/src/xpconnect/tests/chrome/test_getweakmapkeys.xul@8fca2f2f79a392022e409746c1ad4fa08f55b315
child 227480 798dc45a56108aea24215de76990d5b406182e6e
permissions -rw-r--r--
Bug 691411 - Move js/src/xpconnect to js/xpconnect and rename source files while we're at it. r=khuey, sr=mrbkap

<?xml version="1.0"?>
<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=688277
-->
<window title="Mozilla Bug "
        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
  <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>

  <!-- test results are displayed in the html:body -->
  <body xmlns="http://www.w3.org/1999/xhtml">
  <a href="https://bugzilla.mozilla.org/show_bug.cgi?id="
     target="_blank">Mozilla Bug 688277</a>
  </body>

  <!-- test code goes here -->
  <script type="application/javascript">
  <![CDATA[
  /** Test for Bug 688277 **/

  let Cu = Components.utils;

  /* Fail gracefully if junk is passed in. */
  is(Cu.nondeterministicGetWeakMapKeys(11), undefined,
    "nondeterministicGetWeakMapKeys should return undefined for non-objects");
  is(Cu.nondeterministicGetWeakMapKeys({}), undefined,
    "nondeterministicGetWeakMapKeys should return undefined for non-weakmap objects");
  is(Cu.nondeterministicGetWeakMapKeys(null), undefined,
    "nondeterministicGetWeakMapKeys should return undefined for null");

  /* return an empty array for an empty WeakMap */
  let mempty = WeakMap();
  is(Cu.nondeterministicGetWeakMapKeys(mempty).length, 0,
    "nondeterministicGetWeakMapKeys should return empty array for empty weakmap");

  /* Test freeing/nonfreeing. */
  let m = WeakMap();
  let liveKeys = new Array();

  let add_elements = function () {
    let k1 = {};
    m.set(k1, "live1");
    liveKeys.push(k1);

    let k2 = {};
    m.set(k2, "dead1");

    let k = {};
    m.set(k, k); /* simple cycle */
  };

  add_elements();

  Cu.schedulePreciseGC(function () {
    let keys = Cu.nondeterministicGetWeakMapKeys(m);
    is(liveKeys.length, 1, "Wrong number of live keys.");
    is(keys.length, 1, "Should have one weak map key.");
    is(m.get(keys[0]), "live1", "live1 should be live");
    SimpleTest.finish();
  });

  SimpleTest.waitForExplicitFinish();

  ]]>
  </script>
</window>