navigation-traverseTo-navigates-top-and-same-doc-child-and-cross-doc-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-navigates-top-and-same-doc-child-and-cross-doc-child.html - WPT Dashboard Interop Dashboard

<!doctype html>

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

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

<iframe id="i1" src="/common/blank.html"></iframe>

<iframe id="i2" 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;

  await i1.contentWindow.navigation.navigate("#").finished;

  i2.contentWindow.navigation.navigate("?");

  await new Promise(resolve => i2.onload = () => t.step_timeout(resolve, 0));

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

  assert_equals(i1.contentWindow.navigation.entries().length, 2);

  assert_equals(i2.contentWindow.navigation.entries().length, 2);

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

  assert_equals(i1.contentWindow.navigation.currentEntry.index, 1);

  assert_equals(i2.contentWindow.navigation.currentEntry.index, 1);

  let navigate_event_count = 0;

  navigation.onnavigate = t.step_func(e => {

    assert_equals(navigate_event_count, 0);

    navigate_event_count++;

    assert_true(e.cancelable);

});

  i1.contentWindow.navigation.onnavigate = t.step_func(e => {

    assert_true(navigate_event_count > 0);

    navigate_event_count++;

    assert_false(e.cancelable);

});

  i2.contentWindow.navigation.onnavigate = t.step_func(e => {

    assert_true(navigate_event_count > 0);

    navigate_event_count++;

    assert_false(e.cancelable);

});

  await navigation.traverseTo(navigation.entries()[start_index].key).finished;

  // The top window will finish quickly, becuase it is same-document traversal.

  // i2 will be slower because it is cross-document, so wait for its onload.

  await new Promise(resolve => i2.onload = () => t.step_timeout(resolve, 0));

  assert_equals(navigate_event_count, 3);

  assert_equals(navigation.currentEntry.index, start_index);

  assert_equals(i1.contentWindow.navigation.currentEntry.index, 0);

  assert_equals(i2.contentWindow.navigation.currentEntry.index, 0);

}, "navigation.traverseTo() can navigate 3 frames of different types with correct navigate event cancelable values");

</script>