js/xpconnect/tests/mochitest/test_paris_weakmap_keys.html

   1 <!DOCTYPE HTML>
   2 <html>
   3 <!--
   4 https://bugzilla.mozilla.org/show_bug.cgi?id=777385
   5 -->
   6 <head>
   7   <meta charset="utf-8">
   8   <title>Tests for WebIDL objects as weak map keys</title>
   9   <script src="/tests/SimpleTest/SimpleTest.js"></script>
  10   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  11   <script type="application/javascript">
  12
  13   /** Test for Bug 777385 **/
  14
  15   SimpleTest.waitForExplicitFinish();
  16
  17   // We wait to run this until the load event because it needs to access an element.
  18   function go() {
  19
  20   let live_map = new WeakMap;
  21
  22   let get_div_style = function () {
  23     return document.getElementById("mydivname").style;
  24   }
  25
  26   let make_live_map = function () {
  27     let my_div_style = get_div_style();
  28     let div_fail = false;
  29     try {
  30       live_map.set(my_div_style, 12345);
  31     } catch (e) {
  32       div_fail = true;
  33     }
  34     ok(!div_fail, "Using elem.style as a weak map key should not produce an exception.");
  35
  36     is(live_map.get(get_div_style()), 12345, "Live map should have live style with right value before GC.");
  37
  38   }
  39
  40   make_live_map();
  41
  42   let tf = new TestFunctions;
  43
  44   let add_non_isupports2 = function () {
  45     let testKey = tf.wrapperCachedNonISupportsObject;
  46
  47     let testFail = false;
  48     try {
  49       live_map.set(testKey, 23456);
  50     } catch (e) {
  51       testFail = true;
  52     }
  53
  54     ok(!testFail, "Using a wrapper cached non-nsISupports class as a weak map key should not produce an exception.");
  55
  56     is(live_map.get(testKey), 23456, "Live map should have wrapper cached non-nsISupports class right value before GC.");
  57   }
  58
  59   add_non_isupports2();
  60
  61
  62   /* Set up for running precise GC/CC then check the results. */
  63
  64   SpecialPowers.exactGC(function () {
  65     SpecialPowers.forceCC();
  66     SpecialPowers.forceGC();
  67     SpecialPowers.forceGC();
  68
  69     is(SpecialPowers.nondeterministicGetWeakMapKeys(live_map).length, 2,
  70        "Live WebIDL bindings keys should not be removed from a weak map.");
  71
  72     is(live_map.get(get_div_style()), 12345, "Live weak map should have live style with right value after GC.");
  73     is(live_map.get(tf.wrapperCachedNonISupportsObject), 23456,
  74        "Live weak map should have live wrapper cached non-nsISupports class with right value after GC.");
  75
  76     SimpleTest.finish();
  77   });
  78
  79   }
  80
  81   SimpleTest.waitForExplicitFinish();
  82
  83   addLoadEvent(function() {
  84     SpecialPowers.pushPrefEnv({set: [['dom.expose_test_interfaces', true]]},
  85                               go);
  86   });
  87   </script>
  88 </head>
  89 <div></div>
  90 <div id="mydivname"></div>
  91 <body>
  92 <p id="display"></p>
  93 </body>
  94 </html>