<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
test(t => {
  let start_index = navigation.currentEntry.index;

  let oncurrententrychange_called = false;
  let original_entry = navigation.currentEntry;
  navigation.oncurrententrychange = t.step_func(e => {
    oncurrententrychange_called = true;
    assert_equals(e.from, original_entry);
    assert_equals(e.from.index, -1);
    assert_equals(e.navigationType, "replace");
   