gecko-dev/dom/promise/tests/test_dependentPromises.html

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HTML

<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1083950
-->
<head>
<meta charset="utf-8">
<title>Test for Bug 1083950</title>
<script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="chrome://global/skin"/>
<link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
<script type="application/javascript">
/** Test for Bug 1083950 **/
var p = new Promise(() => {});
p.name = "p";
var q = p.then();
q.name = "q";
var r = p.then(null, () => {});
r.name = "r";
var s = Promise.all([p, q]);
s.name = "s";
var t = Promise.race([r, s]);
t.name = "t";
function getDependentNames(promise) {
return PromiseDebugging.getDependentPromises(promise).map((p) => p.name);
}
function arraysEqual(arr1, arr2, msg) {
is(arr1.length, arr2.length, msg + ": length");
for (var i = 0; i < arr1.length; ++i) {
is(arr1[i], arr2[i], msg + ": [" + i + "]");
}
}
arraysEqual(getDependentNames(p), ["q", "r", "s"], "deps for p");
arraysEqual(getDependentNames(q), ["s"], "deps for q");
arraysEqual(getDependentNames(r), ["t"], "deps for r");
arraysEqual(getDependentNames(s), ["t"], "deps for s");
</script>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1083950">Mozilla Bug 1083950</a>
<p id="display"></p>
<div id="content" style="display: none">
</div>
<pre id="test">
</pre>
</body>
</html>