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<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
async_test(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.
window.onload = () => t.step_timeout(() => {
assert_equals(navigation.entries().length, start_length);
let onnavigate_count = 0;
navigation.onnavigate = () => onnavigate_count++;
let key = navigation.currentEntry.key;
navigation.navigate("#").committed
.then(t.step_func(() => {
assert_equals(navigation.entries().length, start_length + 1);
assert_equals(navigation.currentEntry, navigation.entries()[start_index + 1]);
assert_not_equals(key, navigation.currentEntry.key);
return navigation.traverseTo(key).committed;
}))
.then(t.step_func(() => {
assert_equals(navigation.entries().length, start_length + 1);
assert_equals(navigation.currentEntry, navigation.entries()[start_index]);
assert_equals(key, navigation.currentEntry.key);
assert_true(navigation.canGoForward);
return navigation.forward().committed;
}))
.then(t.step_func(() => {
assert_equals(navigation.entries().length, start_length + 1);
assert_equals(navigation.currentEntry, navigation.entries()[start_index + 1]);
assert_true(navigation.canGoBack);
return navigation.back().committed;
}))
.then(t.step_func_done(() => {
assert_equals(navigation.entries().length, start_length + 1);
assert_equals(navigation.currentEntry, navigation.entries()[start_index]);
assert_equals(key, navigation.currentEntry.key);
assert_equals(onnavigate_count, 4);
}));
}, 0);
}, "same-document navigate.traverseTo(), back(), and forward()");
</script>
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