<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/utils.js"></script>
<script src="/common/dispatcher/dispatcher.js"></script>
<script src="/html/browsers/browsing-the-web/back-forward-cache/resources/helper.sub.js"></script>
<script src="resources/is_uuid.js"></script>

<script>
// This test:
// * Does a fragment navigation, then goes back (same-document).
// * Navigates away, then back via bfcache.
// When navigating away, navigation.entries()[1] will be overwritten.
// When returning after bfcache restore, navigation.entries()[1] should represent
// pageB, and the original navigation.entries()[1] should have been disposed.
runBfcacheTest({
  targetOrigin: originSameOrigin,
  funcBeforeNavigation: async () => {
    window.events = [];
    await navigation.navigate("#1");
    await navigation.back();
    window.originalEntry1 = navigation.entries()[1];
    window.originalEntry1.ondispose = () => events.push("dispose");
    window.onpageshow = () => events.push("pageshow");
  },
  async funcAfterAssertion(pageA, pageB) {
    assert_equals(await pageA.execute_script(() => navigation.entries().length), 2);
    assert_false(await pageA.execute_script(() => window.originalEntry1 === navigation.entries[1]));
    assert_array_equals(await pageA.execute_script(() => window.events), ["pageshow", "dispose"]);
  }
}, "entries() must contain the forward-history page after navigating back to a bfcached page");
</script>
