js/xpconnect/tests/chrome/test_getweakmapkeys.xul

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1 <?xml version="1.0"?>
2 <?xml-stylesheet type="text/css" href="chrome://global/skin"?>
3 <?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
4 <!--
5 https://bugzilla.mozilla.org/show_bug.cgi?id=688277
6 -->
7 <window title="Mozilla Bug "
8 xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
9 <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
10
11 <!-- test results are displayed in the html:body -->
12 <body xmlns="http://www.w3.org/1999/xhtml">
13 <a href="https://bugzilla.mozilla.org/show_bug.cgi?id="
14 target="_blank">Mozilla Bug 688277</a>
15 </body>
16
17 <!-- test code goes here -->
18 <script type="application/javascript">
19 <![CDATA[
20 /** Test for Bug 688277 **/
21
22 let Cu = Components.utils;
23
24 /* Fail gracefully if junk is passed in. */
25 is(Cu.nondeterministicGetWeakMapKeys(11), undefined,
26 "nondeterministicGetWeakMapKeys should return undefined for non-objects");
27 is(Cu.nondeterministicGetWeakMapKeys({}), undefined,
28 "nondeterministicGetWeakMapKeys should return undefined for non-weakmap objects");
29 is(Cu.nondeterministicGetWeakMapKeys(null), undefined,
30 "nondeterministicGetWeakMapKeys should return undefined for null");
31
32 /* return an empty array for an empty WeakMap */
33 let mempty = WeakMap();
34 is(Cu.nondeterministicGetWeakMapKeys(mempty).length, 0,
35 "nondeterministicGetWeakMapKeys should return empty array for empty weakmap");
36
37 /* Test freeing/nonfreeing. */
38 let m = WeakMap();
39 let liveKeys = new Array();
40
41 let add_elements = function () {
42 let k1 = {};
43 m.set(k1, "live1");
44 liveKeys.push(k1);
45
46 let k2 = {};
47 m.set(k2, "dead1");
48
49 let k = {};
50 m.set(k, k); /* simple cycle */
51 };
52
53 add_elements();
54
55 Cu.schedulePreciseGC(function () {
56 let keys = Cu.nondeterministicGetWeakMapKeys(m);
57 is(liveKeys.length, 1, "Wrong number of live keys.");
58 is(keys.length, 1, "Should have one weak map key.");
59 is(m.get(keys[0]), "live1", "live1 should be live");
60 SimpleTest.finish();
61 });
62
63 SimpleTest.waitForExplicitFinish();
64
65 ]]>
66 </script>
67 </window>

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