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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(r => window.onload = () => t.step_timeout(r, 0));
let start_length = navigation.entries().length;
let start_index = navigation.currentEntry.index;
location.hash = "#1";
location.hash = "#2";
location.hash = "#3";
assert_equals(navigation.entries().length, start_length + 3);
const [entry0, entry1, entry2, entry3] = navigation.entries().slice(start_index);
assert_equals((new URL(entry2.url)).hash, "#2");
assert_equals((new URL(entry3.url)).hash, "#3");
let dispose3Called = 0;
let spoonPromise;
entry3.addEventListener("dispose", t.step_func(e => {
++dispose3Called;
spoonPromise = navigation.navigate("#spoon").committed;
}));
await navigation.traverseTo(entry1.key).committed;
const forkPromise = navigation.navigate("#fork").committed;
assert_equals(dispose3Called, 1, "dispose for entry 3 must happen exactly once (first check)")
// The navigation to #fork will *not* be finished by the time the navigation
// to #spoon kicks off, so the finished promise will reject. But, the
// committed promise should still fulfill, since as we see below, #fork ends
// up in the history list.
await Promise.all([forkPromise, spoonPromise]);
assert_equals(dispose3Called, 1, "dispose for entry 3 must happen exactly once (final check)");
assert_equals(navigation.entries().length, start_length + 3);
const [finalEntry0, finalEntry1, finalEntry2, finalEntry3] = navigation.entries().slice(start_index);
assert_equals(finalEntry0, entry0);
assert_equals(finalEntry1, entry1);
assert_not_equals(finalEntry2, entry2);
assert_not_equals(finalEntry3, entry3);
assert_equals(navigation.currentEntry, finalEntry3);
assert_equals((new URL(finalEntry2.url)).hash, "#fork");
assert_equals((new URL(finalEntry3.url)).hash, "#spoon");
}, "navigate() during a same-document-navigation-initiated dispose works (since it's after the previous navigation)");
</script>
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