HighlightRegistry-maplike-tampered-Map-prototype.html

Enable keyboard shortcuts

This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /css/css-highlight-api/HighlightRegistry-maplike-tampered-Map-prototype.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>HighlightRegistry is a maplike interface that works as expected even if Map.prototype is tampered</title>

<link rel="help" href="https://drafts.csswg.org/css-highlight-api-1/">

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

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

<body>

<script>

"use strict";

function tamperMapPrototype() {

  delete Map.prototype.size;

  Map.prototype.entries = null;

  Map.prototype.forEach = undefined;

  Map.prototype.get = "foo";

  Map.prototype.has = 0;

  Map.prototype.keys = Symbol();

  Map.prototype.values = 1;

  Map.prototype[Symbol.iterator] = true;

  Map.prototype.clear = false;

  Map.prototype.delete = "";

  Map.prototype.set = 3.14;

  Object.freeze(Map.prototype);

test(() => {

  tamperMapPrototype();

  const highlight = new Highlight(new StaticRange({startContainer: document.body, endContainer: document.body, startOffset: 0, endOffset: 0}));

  const highlightRegistry = new HighlightRegistry();

  assert_equals(highlightRegistry.size, 0);

  highlightRegistry.set("foo", highlight);

  assert_equals(highlightRegistry.size, 1);

  assert_true(highlightRegistry.has("foo"));

  assert_equals([...highlightRegistry.entries()][0][0], "foo");

  highlightRegistry.clear();

  assert_equals(highlightRegistry.size, 0);

  assert_equals(highlightRegistry.get("foo"), undefined);

  highlightRegistry.set("bar", highlight);

  assert_equals(highlightRegistry.get("bar"), highlight);

  assert_equals([...highlightRegistry][0][1], highlight);

  highlightRegistry.delete("bar");

  assert_equals(highlightRegistry.size, 0);

  assert_false(highlightRegistry.has("bar"));

  highlightRegistry.set("baz", highlight);

  assert_equals([...highlightRegistry.keys()][0], "baz");

  assert_equals([...highlightRegistry.values()][0], highlight);

  let callbackCalled = false;

  highlightRegistry.forEach(() => { callbackCalled = true; });

  assert_true(callbackCalled);

}, "HighlightRegistry is a maplike interface that works as expected even if Map.prototype is tampered.");

</script>