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<!DOCTYPE html>
<meta charset="utf-8">
<title>[[SetPrototypeOf]] on a WindowProxy object should not allow changing its value: same-origin</title>
<link rel="help" href="http://html.spec.whatwg.org/multipage/#windowproxy-setprototypeof">
<link rel="author" title="Domenic Denicola" href="mailto:d@domenic.me">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/test-setting-immutable-prototype.js"></script>
<script>
"use strict";
const origProto = Object.getPrototypeOf(window);
test(() => {
assert_not_equals(origProto, null);
}, "Same-origin prerequisite check: the original prototype is accessible");
testSettingImmutablePrototype("Same-origin", window, origProto, { isSameOriginDomain: true });
</script>
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