TreeWalker-acceptNode-filter-cross-realm.html

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This test has a WPT meta file that expects 5 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /dom/traversal/TreeWalker-acceptNode-filter-cross-realm.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>TreeWalker: cross-realm NodeFilter throws TypeError of its associated Realm</title>

<link rel="help" href="https://webidl.spec.whatwg.org/#ref-for-prepare-to-run-script">

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

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

<iframe name="nodeFilterGlobalObject" src="support/empty-document.html"></iframe>

<div id="treeWalkerRoot">

    <div class="firstChild"></div>

</div>

<script>

test_onload(() => {

    const nodeFilter = new nodeFilterGlobalObject.Object;

    const walker = document.createTreeWalker(treeWalkerRoot, NodeFilter.SHOW_ELEMENT, nodeFilter);

    assert_throws_js(nodeFilterGlobalObject.TypeError, () => { walker.firstChild(); });

}, "NodeFilter is cross-realm plain object without 'acceptNode' property");

test_onload(() => {

    const nodeFilter = new nodeFilterGlobalObject.Object;

    nodeFilter.acceptNode = {};

    const walker = document.createTreeWalker(treeWalkerRoot, NodeFilter.SHOW_ELEMENT, nodeFilter);

    assert_throws_js(nodeFilterGlobalObject.TypeError, () => { walker.firstChild(); });

}, "NodeFilter is cross-realm plain object with non-callable 'acceptNode' property");

test_onload(() => {

    const { proxy, revoke } = Proxy.revocable(() => {}, {});

    revoke();

    const nodeFilter = new nodeFilterGlobalObject.Object;

    nodeFilter.acceptNode = proxy;

    const walker = document.createTreeWalker(treeWalkerRoot, NodeFilter.SHOW_ELEMENT, nodeFilter);

    assert_throws_js(nodeFilterGlobalObject.TypeError, () => { walker.firstChild(); });

}, "NodeFilter is cross-realm plain object with revoked Proxy as 'acceptNode' property");

test_onload(() => {

    const { proxy, revoke } = nodeFilterGlobalObject.Proxy.revocable({}, {});

    revoke();

    const walker = document.createTreeWalker(treeWalkerRoot, NodeFilter.SHOW_ELEMENT, proxy);

    assert_throws_js(nodeFilterGlobalObject.TypeError, () => { walker.firstChild(); });

}, "NodeFilter is cross-realm non-callable revoked Proxy");

test_onload(() => {

    const { proxy, revoke } = nodeFilterGlobalObject.Proxy.revocable(() => {}, {});

    revoke();

    const walker = document.createTreeWalker(treeWalkerRoot, NodeFilter.SHOW_ELEMENT, proxy);

    assert_throws_js(nodeFilterGlobalObject.TypeError, () => { walker.firstChild(); });

}, "NodeFilter is cross-realm callable revoked Proxy");

function test_onload(fn, desc) {

    async_test(t => { window.addEventListener("load", t.step_func_done(fn)); }, desc);

</script>