navigation-api/currententrychange-event/navigation-navigate-intercept.html

<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<iframe id="i" src="/common/blank.html"></iframe>
<script>
promise_test(async t => {
  await new Promise(resolve => window.onload = resolve);

  let oncurrententrychange_called = false;
  i.contentWindow.navigation.oncurrententrychange = t.step_func(e => {
    oncurrententrychange_called = true;
    assert_equals(e.from, i.contentWindow.navigation.entries()[0]);
    assert_equals(e.navigationType, "push");
    assert_equals(i.contentWindow.navigation.currentEntry.index, 1);
  });
  i.contentWindow.navigation.onnavigate = e => e.intercept();
  let result = i.contentWindow.navigation.navigate("/common/blank.html?1");
  assert_true(oncurrententrychange_called);
  await result.committed;
}, "currententrychange fires for navigation.navigate() intercepted by intercept()");
</script>