testing/web-platform/tests/navigation-api/navigation-methods/return-value/traverseTo-transitionWhile-rejected.html

   1 <!doctype html>
   2 <script src="/resources/testharness.js"></script>
   3 <script src="/resources/testharnessreport.js"></script>
   4 <script src="resources/helpers.js"></script>
   5
   6 <script>
   7 promise_test(async t => {
   8   // Wait for after the load event so that the navigation doesn't get converted
   9   // into a replace navigation.
  10   await new Promise(resolve => window.onload = () => t.step_timeout(resolve, 0));
  11
  12   const key0 = navigation.currentEntry.key;
  13
  14   location.href = "#1";
  15
  16   assert_equals(navigation.entries().length, 2);
  17   const [entry0, entry1] = navigation.entries();
  18   assert_equals((new URL(entry0.url)).hash, "");
  19   assert_equals((new URL(entry1.url)).hash, "#1");
  20
  21   const err = new Error("boo!");
  22   const promise = Promise.reject(err);
  23   promise.catch(() => {}); // prevent unhandled rejection testharness.js errors
  24   navigation.onnavigate = e => e.transitionWhile(promise);
  25
  26   const result = navigation.traverseTo(key0);
  27   await assertCommittedFulfillsFinishedRejectsExactly(t, result, entry0, err);
  28   assert_equals(navigation.currentEntry, entry0);
  29 }, "traverseTo() promise rejection with rejected transitionWhile()");
  30 </script>