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<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
promise_test(async t => {
// 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));
history.replaceState({ state: "foo"}, "", "#replace");
let onpopstate_fired = false;
let last_state;
window.onpopstate = e => {
onpopstate_fired = true;
last_state = e.state;
}
navigation.onnavigate = t.step_func(e => e.intercept());
await navigation.navigate("#").finished;
assert_true(navigation.canGoBack);
await navigation.back().finished;
assert_true(onpopstate_fired);
assert_not_equals(last_state, null);
}, "event.intercept() should provide popstate with a valid state object");
</script>
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