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<!DOCTYPE HTML>
<meta name="timeout" content="long">
<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>
const reload = () => {
window.location.reload();
};
const getNavigationId = () => {
window.performance.mark('initial_load');
let entries = window.performance.getEntriesByType('mark');
return entries[entries.length - 1].navigationId;
}
promise_test(async t => {
const pageA = new RemoteContext(token());
const pageB = new RemoteContext(token());
const urlA = executorPath + pageA.context_id;
const urlB = originCrossSite + executorPath + pageB.context_id;
// Open url A.
window.open(urlA, '_blank', 'noopener')
await pageA.execute_script(waitForPageShow);
// Assert navigation id is 1 when the document is loaded first time.
let navigationId = await pageA.execute_script(getNavigationId);
assert_equals(navigationId, 1, 'Navigation Id should be 1 initially.');
// Navigate away to url B and back.
await navigateAndThenBack(pageA, pageB, urlB);
// Assert navigation id increments to 2 when the document is load from bfcache.
navigationId = await pageA.execute_script(getNavigationId);
assert_equals(navigationId, 2, 'Navigation Id should be 2 after increment.');
// Reload page.
await pageA.execute_script(reload);
await pageA.execute_script(waitForPageShow);
// Assert navigation id is reset to 1 after reload.
navigationId = await pageA.execute_script(getNavigationId);
assert_equals(navigationId, 1, 'Navigation Id should be 1 after reload.');
}, 'Navigation Id should be reset to 1 after reload.');
</script>
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