iframe-history-restore-about-blank.tentative.html

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This test has a WPT meta file that expects 3 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /html/browsers/browsing-the-web/history-traversal/iframe-history-restore-about-blank.tentative.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>about:blank is treated as initial for container reload and traversal</title>

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

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

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

<script src="/common/get-host-info.sub.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-initial-about-blank-iframe.html", t);

  assert_equals(w.history.length, 1);

  // For this test, the initial message might race with the next one

  await waitForMessage(w);

  // Navigate the container away and back

  await waitToAvoidReplace(t);

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

  await waitForMessage(w);

  assert_equals(w.history.length, 2);

  w.history.back();

  await waitForMessage(w);

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

  assert_equals(iframeAgain.contentWindow.location.href, "about:blank");

  assert_true(w.initialAboutBlankWasSync);

}, "initial about:blank is loaded sync when container traverses back");

promise_test(async t => {

  // Open and wait for load

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

  assert_equals(w.history.length, 1);

  await waitToAvoidReplace(t);

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

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

  await waitForIframeLoad(iframe);

  await waitToAvoidReplace(t);

  iframe.src = "about:blank";

  await waitForIframeLoad(iframe);

  assert_equals(w.history.length, 2);

  // 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_equals(iframeAgain.contentWindow.location.href, "about:blank");

  assert_true(w.initialAboutBlankWasSync);

}, "non-initial about:blank is loaded sync when container traverses back");

promise_test(async t => {

  // Open and wait for load

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

  assert_equals(w.history.length, 1);

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

  const xoriginURL = get_host_info().HTTP_REMOTE_ORIGIN +

    "/html/browsers/browsing-the-web/resources/navigates-to-blank.html";

  await waitToAvoidReplace(t);

  iframe.src = xoriginURL;

  await waitForIframeLoad(iframe); // xoriginURL

  await waitForIframeLoad(iframe); // about:blank

  assert_equals(w.history.length, 2);

  // 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_equals(iframeAgain.contentWindow.location.href, "about:blank");

  assert_true(w.initialAboutBlankWasSync);

}, "xorigin non-initial about:blank is loaded sync when container traverses back");

</script>