navigate-destination-dynamic-index.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/navigate-destination-dynamic-index.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>

<script>

promise_test(async t => {

  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("#1").finished;

  let back_destination;

  navigation.addEventListener("navigate", t.step_func(e => {

    back_destination = e.destination;

    assert_equals(back_destination.index, start_index);

  }), { once: true });

  await navigation.back().finished;

  // Disposing the destination entry of back_destination should update

  // back_destination.index, even though back_destination's navigation has

  // completed.

  await navigation.navigate("#clobber_back", { history: "replace" }).finished;

  assert_equals(back_destination.index, -1);

  navigation.addEventListener("navigate", t.step_func(e => {

    assert_equals(e.destination.index, start_index + 1);

    // Dispose the destination entry and destination.index should update.

    navigation.navigate("#clobber_forward");

    assert_equals(e.destination.index, -1);

  }), { once: true });

  await assertBothRejectDOM(t, navigation.forward(), "AbortError");

}, "navigate event destination.index should be dynamic");

</script>