cross-origin-objects-function-caching.html

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This WPT test may be referenced by the following Test IDs:
- /html/browsers/origin/cross-origin-objects/cross-origin-objects-function-caching.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<title>Cross-origin methods and accessors are cached per Realm via[[CrossOriginPropertyDescriptorMap]]</title>

<link rel="help" href="https://html.spec.whatwg.org/multipage/browsers.html#crossorigingetownpropertyhelper-(-o,-p-)">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/common/get-host-info.sub.js"></script>

<script src="cross-origin-objects-function-common.js"></script>

<div id=log></div>

<script>

"use strict";

promise_test(async t => {

    const w = await makeCrossOriginWindow(t);

    for (const {key} of crossOriginWindowMethods) {

        assert_equals(w[key], w[key], `w.${key} via [[Get]]`);

        const desc1 = Object.getOwnPropertyDescriptor(w, key);

        const desc2 = Object.getOwnPropertyDescriptor(w, key);

        assert_equals(desc1.value, desc2.value, `w.${key} via [[GetOwnProperty]]`);

}, "Cross-origin Window methods are cached");

promise_test(async t => {

    const w = await makeCrossOriginWindow(t);

    for (const {key} of crossOriginWindowAccessors) {

        const desc1 = Object.getOwnPropertyDescriptor(w, key);

        const desc2 = Object.getOwnPropertyDescriptor(w, key);

        assert_equals(desc1.get, desc2.get, `w.${key} getter`);

        if (key === "location") {

            assert_equals(desc1.set, desc2.set, `w.${key} setter`);

}, "Cross-origin Window accessors are cached");

promise_test(async t => {

    const w = await makeCrossOriginWindow(t);

    assert_equals(w.location.replace, w.location.replace, "via [[Get]]");

    const desc1 = Object.getOwnPropertyDescriptor(w.location, "replace");

    const desc2 = Object.getOwnPropertyDescriptor(w.location, "replace");

    assert_equals(desc1.value, desc2.value, "via [[GetOwnProperty]]");

}, "Cross-origin Location `replace` method is cached");

promise_test(async t => {

    const w = await makeCrossOriginWindow(t);

    const desc1 = Object.getOwnPropertyDescriptor(w.location, "href");

    const desc2 = Object.getOwnPropertyDescriptor(w.location, "href");

    assert_equals(desc1.set, desc2.set);

}, "Cross-origin Location `href` setter is cached");

</script>