cross-document-nav-cross-document-traversal.html

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This WPT test may be referenced by the following Test IDs:
- /html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-nav-cross-document-traversal.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>Cross-document traversal during cross-document navigation</title>

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

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

<!--

  According to the spec, "apply the history step" will set the ongoing

  navigation to "traversal", canceling any non-mature navigations.

-->

<body>

<script type="module">

import { createIframe, waitForLoad, delay } from "./resources/helpers.mjs";

promise_test(async t => {

  const iframe = await createIframe(t);

  // Setup

  // Extra delay()s are necessary because if we navigate "inside" the load

  // handler (i.e. in a promise reaction for the load handler) then it will

  // be a replace navigation.

  iframe.contentWindow.location.search = "?1";

  await waitForLoad(iframe);

  await delay(t, 0);

  iframe.contentWindow.location.search = "?2";

  await waitForLoad(iframe);

  await delay(t, 0);

  iframe.contentWindow.location.search = "?3";

  iframe.contentWindow.history.back();

  assert_equals(iframe.contentWindow.location.search, "?2", "must not go back synchronously");

  await waitForLoad(iframe);

  assert_equals(iframe.contentWindow.location.search, "?1", "must go back one step eventually");

}, "cross-document navigations are stopped by cross-document back()");

</script>