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<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
promise_test(async t => {
let start_length = navigation.entries().length;
let start_index = navigation.currentEntry.index;
// Wait for after the load event so that the navigation doesn't get converted
// into a replace navigation.
await new Promise(resolve => window.onload = () => t.step_timeout(resolve, 0));
assert_equals(navigation.entries().length, start_length);
let key0 = navigation.currentEntry.key;
await navigation.navigate("#1").committed;
await navigation.navigate("#2").committed;
let key2 = navigation.currentEntry.key;
assert_equals(navigation.entries().length, start_length + 2);
await navigation.traverseTo(key0).committed;
assert_equals(navigation.entries().length, start_length + 2);
assert_equals(navigation.currentEntry, navigation.entries()[start_index]);
assert_equals(key0, navigation.currentEntry.key);
await navigation.traverseTo(key2).committed;
assert_equals(navigation.entries().length, start_length + 2);
assert_equals(navigation.currentEntry, navigation.entries()[start_index+2]);
assert_equals(key2, navigation.currentEntry.key);
}, "goto() can precisely traverse multiple steps in the joint session history");
</script>
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