navigation-api/navigation-methods/reload-navigation-timing.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);
  i.contentWindow.navigation.reload();
  await new Promise(resolve => i.onload = resolve);

  const entries = i.contentWindow.performance.getEntriesByType("navigation");
  assert_equals(entries.length, 1);
  assert_equals(entries[0].type, "reload");
}, `reload() appears as a reload to navigation timing APIs`);
</script>