forward-triggers-hashchange.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /html/browsers/browsing-the-web/scroll-to-fragid/forward-triggers-hashchange.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>Navigating forward after replace() should still trigger hashchange</title>

<link rel="help" href="https://html.spec.whatwg.org/multipage/#history-traversal">

<link rel="author" href="mailto:d@domenic.me" title="Domenic Denicola">

<!-- While writing ./replacement-enabled.html, a bug was discovered in Firefox where it does not

fire hashchange when using history.forward(), at least under certain conditions. So, this test

exercises that specifically. -->

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

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

<script src="navigate-helpers.js"></script>

<body>

<script>

"use strict";

let resolve, iframe;

promise_test(() => {

  iframe = document.createElement("iframe");

  iframe.src = "/common/blank.html";

  iframe.addEventListener("load", runTest);

  document.body.appendChild(iframe);

  return new Promise(r => resolve = r);

});

function runTest() {

  iframe.removeEventListener("load", runTest);

  const frameWindow = iframe.contentWindow;

  resolve((async () => {

    await navigateAndWaitForChange(frameWindow, w => w.location.href = "/common/blank.html#apple");

    await navigateAndWaitForChange(frameWindow, w => w.location.href = "/common/blank.html#banana");

    await navigateAndWaitForChange(frameWindow, w => w.location.href = "/common/blank.html#cat");

    await navigateAndWaitForChange(frameWindow, w => w.history.back());

    await navigateAndWaitForChange(frameWindow,

      w => w.location.replace("/common/blank.html#zebra"));

    await navigateAndWaitForChange(frameWindow, w => w.history.forward());

  })());

</script>