iframe-history-restore-on-container-traversal.tentative.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/history-traversal/iframe-history-restore-on-container-traversal.tentative.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>Iframe JS-navigated URL is preserved on container back-traversal but not reload</title>

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

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

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

<script>

"use strict";

// Note: bfcache won't mess with any windows with openers, so it doesn't

// interfere with these tests.

// Tentative due to https://github.com/whatwg/html/issues/12872

promise_test(async t => {

  // Open and wait for load

  const w = await openWindow("../resources/has-iframe.html", t);

  const iframe = w.document.querySelector("iframe");

  const srcURL = iframe.contentWindow.location.href;

  assert_equals(w.history.length, 1);

  // Navigate the iframe to a different URL.

  await waitToAvoidReplace(t);

  iframe.contentWindow.location.href = "/common/blank.html?navigated";

  await waitForIframeLoad(iframe);

  assert_equals(w.history.length, 2);

  assert_not_equals(iframe.contentWindow.location.href, srcURL);

  // Navigate the container away and back

  w.location.href = "../resources/post-top-opener-on-load.html";

  await waitForMessage(w);

  assert_equals(w.history.length, 3);

  w.history.back();

  await waitForMessage(w);

  const iframeAgain = w.document.querySelector("iframe");

  assert_not_equals(iframeAgain.contentWindow.location.href, srcURL,

    "iframe must be at its JS-navigated URL after container is recreated from network");

}, "iframe is restored to JS-navigated URL when container traverses back");

promise_test(async t => {

  // Open and wait for load

  const w = await openWindow("../resources/has-iframe.html", t);

  const iframe = w.document.querySelector("iframe");

  const srcURL = iframe.contentWindow.location.href;

  assert_equals(w.history.length, 1);

  // Navigate the iframe to a different URL.

  await waitToAvoidReplace(t);

  iframe.contentWindow.location.href = "/common/blank.html?navigated";

  await waitForIframeLoad(iframe);

  assert_equals(w.history.length, 2);

  assert_not_equals(iframe.contentWindow.location.href, srcURL);

  // Reload, has-iframe.html will send a message on load.

  w.location.reload();

  await waitForMessage(w);

  assert_equals(w.history.length, 2);

  const iframeAgain = w.document.querySelector("iframe");

  assert_equals(iframeAgain.contentWindow.location.href, srcURL,

    "iframe must be at its src URL after container is recreated from network");

}, "iframe is not restored to JS-navigated URL when container is reloaded");

</script>