forward-to-pruned-entry.html

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This WPT test may be referenced by the following Test IDs:
- /html/browsers/browsing-the-web/overlapping-navigations-and-traversals/forward-to-pruned-entry.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(resolve => window.onload = () => t.step_timeout(resolve, 0));

  location.hash = "#1";

  location.hash = "#2";

  history.go(-2);

  await new Promise(r => window.onpopstate = r);

  // Traverse forward then immediately do a same-document push. This will

  // truncate the back forward list.

  history.forward();

  location.hash = "#clobber";

  // history.forward() should be aborted.

  window.onpopstate = t.unreached_func("history.forward() should have been cancelled");

  await new Promise(r => t.step_timeout(r, 20));

  assert_equals(location.hash, "#clobber");

}, "If forward pruning clobbers the target of a traverse, abort");

</script>