depth_limit.html | Explore in Territory

<!DOCTYPE html>
<meta charset="utf-8">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<script type="module">
import {WebFeature} from '/gen/third_party/blink/public/mojom/use_counter/metrics/web_feature.mojom.m.js';

// This test suite verifies that the following use counter work correctly:
// - kMaximumHTMLParserDOMTreeDepthHit

// from third_party/blink/renderer/core/html/parser/html_construction_site.h
const kMaximumHTMLParserDOMTreeDepth = 512;
const HTML_OVER_LIMIT = '<div>'.repeat(kMaximumHTMLParserDOMTreeDepth + 10) + 'hello';
const HTML_BELOW_LIMIT = '<div>'.repeat(kMaximumHTMLParserDOMTreeDepth - 1) + 'hello';

test(() => {
    internals.clearUseCounter(document, WebFeature.kMaximumHTMLParserDOMTreeDepthHit);
    assert_false(internals.isUseCounted(document, WebFeature.kMaximumHTMLParserDOMTreeDepthHit));

    document.createElement("div").innerHTML = HTML_OVER_LIMIT;

    assert_true(internals.isUseCounted(document, WebFeature.kMaximumHTMLParserDOMTreeDepthHit));

}, 'Super deeply nested DOM nodes are use counted (via innerHTML)');

test(() => {
    internals.clearUseCounter(document, WebFeature.kMaximumHTMLParserDOMTreeDepthHit);
    assert_false(internals.isUseCounted(document, WebFeature.kMaximumHTMLParserDOMTreeDepthHit));

    const doc = new DOMParser().parseFromString(HTML_OVER_LIMIT, 'text/html');

    assert_true(internals.isUseCounted(document, WebFeature.kMaximumHTMLParserDOMTreeDepthHit));

}, 'Super deeply nested DOM nodes are use counted (via DOMParser)');

promise_test(async () => {
    const iframe = document.createElement("iframe");
    iframe.srcdoc = HTML_OVER_LIMIT;
    document.body.append(iframe);

    await new Promise(r => iframe.addEventListener('load', r, {once:true}));

    assert_true(internals.isUseCounted(iframe.contentDocument, WebFeature.kMaximumHTMLParserDOMTreeDepthHit));

}, 'Super deeply nested DOM nodes are use counted (via iframe)');


test(() => {
    internals.clearUseCounter(document, WebFeature.kMaximumHTMLParserDOMTreeDepthHit);
    assert_false(internals.isUseCounted(document, WebFeature.kMaximumHTMLParserDOMTreeDepthHit));

    document.createElement("div").innerHTML = HTML_BELOW_LIMIT;

    assert_false(internals.isUseCounted(document, WebFeature.kMaximumHTMLParserDOMTreeDepthHit));

}, 'Deeply nested DOM nodes under the limit are NOT use counted (via innerHTML)');

test(() => {
    internals.clearUseCounter(document, WebFeature.kMaximumHTMLParserDOMTreeDepthHit);
    assert_false(internals.isUseCounted(document, WebFeature.kMaximumHTMLParserDOMTreeDepthHit));

    const doc = new DOMParser().parseFromString(HTML_BELOW_LIMIT, 'text/html');

    assert_false(internals.isUseCounted(document, WebFeature.kMaximumHTMLParserDOMTreeDepthHit));

}, 'Deeply nested DOM nodes under the limit are NOT use counted (via DOMParser)');

promise_test(async () => {
    const iframe = document.createElement("iframe");
    iframe.srcdoc = HTML_BELOW_LIMIT;
    document.body.append(iframe);

    await new Promise(r => iframe.addEventListener('load', r, {once:true}));

    assert_false(internals.isUseCounted(iframe.contentDocument, WebFeature.kMaximumHTMLParserDOMTreeDepthHit));

}, 'Deeply nested DOM nodes under the limit are NOT use counted (via iframe)');


</script>
chromium/third_party/blink/web_tests/wpt_internal/dom/depth_limit.html
