<!DOCTYPE html>
<meta charset="utf-8">
<title>Cross-document navigations during same-document traversals</title>
<meta name="timeout" content="long">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<!--
  The spec says that navigations are ignored if there is an ongoing traversal.
-->

<body>
<script type="module">
import { createIframe, delay, waitForPotentialNetworkLoads } from "./resources/helpers.mjs";

promise_test(async t => {
  const iframe = await createIframe(t);

  // Setup
  iframe.contentWindow.location.hash = "#1";
  await delay(t, 0);
  iframe.contentWindow.location.hash = "#2";
  await delay(t, 0);

  iframe.contentWindow.history.back();

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

  iframe.contentWindow.location.search = "?1";
  assert_equals(iframe.contentWindow.location.search, "", "must not navigate synchronously (search)");
  assert_equals(iframe.contentWindow.location.hash, "#2", "must not navigate synchronously (hash)");

  // Eventually ends up on #1.
  await t.step_wait(() => iframe.contentWindow.location.hash === "#1", "traversal");

  // Never loads a different document.
  iframe.onload = t.unreached_func("load event");
  await waitForPotentialNetworkLoads(t);
  assert_equals(iframe.contentWindow.location.search, "", "must stay on #2 (search)");
  assert_equals(iframe.contentWindow.location.hash, "#2", "must stay on #2 (hash)");
}, "same-document traversals are not canceled by cross-document navigations");
</script>
