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<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<iframe id="i" src="/common/blank.html"></iframe>
<script type="module">
import { ensureWindowLoadEventFired } from "../resources/helpers.mjs";
promise_test(async t => {
// Wait for after the load event so that the navigation doesn't get converted
// into a replace navigation.
await ensureWindowLoadEventFired(t);
let i_navigation = i.contentWindow.navigation;
await i_navigation.navigate("#1").finished;
await i_navigation.navigate("#2").finished;
await i_navigation.back().finished;
assert_not_equals(i_navigation, null);
assert_not_equals(i_navigation.currentEntry, null);
assert_equals(i_navigation.entries().length, 3);
assert_true(i_navigation.canGoBack, "canGoBack");
assert_true(i_navigation.canGoForward, "canGoForward");
i.remove();
assert_equals(i_navigation.currentEntry, null);
assert_equals(i_navigation.entries().length, 0);
assert_false(i_navigation.canGoBack);
assert_false(i_navigation.canGoForward);
}, "navigation.currentEntry/entries()/canGoBack/canGoForward after iframe removal");
</script>
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