currententrychange-before-popstate-intercept.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/ordering-and-transition/currententrychange-before-popstate-intercept.html - WPT Dashboard Interop Dashboard

<!doctype html>

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

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

<script>

promise_test(async t => {

  let start_length = navigation.entries().length;

  // 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("#foo").committed;

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

  navigation.onnavigate = e => e.intercept();

  let oncurrententrychange_back_called = false;

  let onpopstate_back_called = false;

  window.onpopstate = t.step_func(e => {

    onpopstate_back_called = true;

    assert_true(oncurrententrychange_back_called);

});

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

    oncurrententrychange_back_called = true;

    assert_false(onpopstate_back_called);

});

  let back_result = navigation.back();

  assert_false(oncurrententrychange_back_called);

  assert_false(onpopstate_back_called);

  await back_result.finished;

  assert_true(oncurrententrychange_back_called);

  assert_true(onpopstate_back_called);

  let oncurrententrychange_forward_called = false;

  let onpopstate_forward_called = false;

  window.onpopstate = t.step_func(e => {

    onpopstate_forward_called = true;

    assert_true(oncurrententrychange_forward_called);

});

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

    oncurrententrychange_forward_called = true;

    assert_false(onpopstate_forward_called);

});

  let forward_result = navigation.forward();

  assert_false(oncurrententrychange_forward_called);

  assert_false(onpopstate_forward_called);

  await forward_result.finished;

  assert_true(oncurrententrychange_back_called);

  assert_true(onpopstate_forward_called);

}, "currententrychange fires before popstate for navigation.back() and navigation.forward()");

</script>