dispose-for-full-session-history.tentative.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /navigation-api/per-entry-events/dispose-for-full-session-history.tentative.html - WPT Dashboard Interop Dashboard

<!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 dispose_promise = new Promise(r => navigation.currentEntry.ondispose = r);

  // There is no spec for the maximum number of joint session history entries

  // (hence this is a .tentative.html test). However, all(?) browsers have a

  // settled on a maximum of 50.

  for (let i = 0; i < 50; i++)

    await navigation.navigate("#" + i).finished;

  await dispose_promise;

}, "Dispose should fire when an entry is removed from session history due to too many entries");

</script>