navigation-traverseTo-top-cancels-cross-document-child.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:
- /navigation-api/navigate-event/navigation-traverseTo-top-cancels-cross-document-child.html - WPT Dashboard Interop Dashboard

<!doctype html>

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

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

<script src="../navigation-methods/return-value/resources/helpers.js"></script>

<iframe id="i" src="/common/blank.html"></iframe>

<script>

promise_test(async t => {

  let start_length = navigation.entries().length;

  let start_index = navigation.currentEntry.index;

  // Wait for after the load event so that the navigation doesn't get converted

  // into a replace navigation.

  await new Promise(resolve => window.onload = () => t.step_timeout(resolve, 0));

  await navigation.navigate("#").finished;

  i.contentWindow.navigation.navigate("?");

  await new Promise(resolve => i.onload = () => t.step_timeout(resolve, 0));

  assert_equals(navigation.entries().length, start_length + 1);

  assert_equals(i.contentWindow.navigation.entries().length, 2);

  assert_equals(navigation.currentEntry.index, start_index + 1);

  assert_equals(i.contentWindow.navigation.currentEntry.index, 1);

  navigation.onnavigate = t.step_func(e => e.preventDefault());

  i.contentWindow.navigation.onnavigate = t.unreached_func("navigation should be cancelled before iframe fires navigate event");

  await assertBothRejectDOM(t, navigation.traverseTo(navigation.entries()[start_index].key), "AbortError");

  // Give the iframe time to navigate in case it was incorrectly permitted.

  await new Promise(resolve => t.step_timeout(resolve, 50));

}, "navigate.traverseTo() cancelled by top frame cancels cross-document iframe");

</script>