gecko-dev/dom/bindings/test/test_lookupGetter.html

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HTML

<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=462428
-->
<head>
<title>Test for Bug 462428</title>
<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=462428">Mozilla Bug 462428</a>
<p id="display"></p>
<div id="content" style="display: none">
</div>
<pre id="test">
<script type="application/javascript">
/** Test for Bug 462428 **/
var x = new XMLHttpRequest;
x.open("GET", "");
var getter = x.__lookupGetter__('readyState');
ok(getter !== undefined, "But able to look it up the normal way");
ok(!x.hasOwnProperty('readyState'), "property should still be on the prototype");
var sawProp = false;
for (var i in x) {
if (i === "readyState") {
sawProp = true;
}
}
ok(sawProp, "property should be enumerable");
is(getter.call(x), 1, "the getter actually works");
Object.getPrototypeOf(x).__defineSetter__('readyState', function() {});
is(getter.call(x), 1, "the getter works after defineSetter");
is(x.responseType, "", "Should have correct responseType up front");
var setter = x.__lookupSetter__('responseType');
setter.call(x, "document");
is(x.responseType, "document", "the setter is bound correctly");
</script>
</pre>
</body>
</html>