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<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../navigation-methods/return-value/resources/helpers.js"></script>
<iframe id="i" src="/common/blank.html"></iframe>
<script type="module">
import { ensureWindowLoadEventFired } from "../resources/helpers.mjs";
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 ensureWindowLoadEventFired(t);
await navigation.navigate("#").finished;
i.contentWindow.navigation.navigate("?");
await new Promise(resolve => i.onload = () => t.step_timeout(resolve, 0));
assert_equals(navigation.entries().length, start_length + 1);
assert_equals(i.contentWindow.navigation.entries().length, 2);
assert_equals(navigation.currentEntry.index, start_index + 1);
assert_equals(i.contentWindow.navigation.currentEntry.index, 1);
navigation.onnavigate = t.step_func(e => e.preventDefault());
i.contentWindow.navigation.onnavigate = t.unreached_func("navigation should be cancelled before iframe fires navigate event");
await assertBothRejectDOM(t, navigation.traverseTo(navigation.entries()[start_index].key), "AbortError");
// Give the iframe time to navigate in case it was incorrectly permitted.
await new Promise(resolve => t.step_timeout(resolve, 50));
}, "navigate.traverseTo() cancelled by top frame cancels cross-document iframe");
</script>
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