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

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HTML

<!doctype html>
<meta charset=utf-8>
<title>[LenientThis]</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<div id=log></div>
<script>
function noop1() { }
function noop2() { }
test(function() {
var desc = Object.getOwnPropertyDescriptor(Document.prototype, "onreadystatechange");
document.onreadystatechange = noop1;
assert_equals(document.onreadystatechange, noop1, "document.onreadystatechange == noop1");
assert_equals(desc.get.call({ }), undefined, "document.onreadystatechange getter.call({}) == undefined");
}, "invoking Document.onreadystatechange's getter with an invalid this object returns undefined");
test(function() {
var desc = Object.getOwnPropertyDescriptor(Document.prototype, "onreadystatechange");
document.onreadystatechange = noop1;
assert_equals(document.onreadystatechange, noop1, "document.onreadystatechange == noop1");
assert_equals(desc.set.call({ }, noop2), undefined, "document.onreadystatechange setter.call({}) == undefined");
assert_equals(document.onreadystatechange, noop1, "document.onreadystatechange == noop1 (still)");
}, "invoking Document.onreadystatechange's setter with an invalid this object does nothing and returns undefined");
</script>