testing/web-platform/tests/app-history/navigate/return-value/goTo-beforeunload.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 <iframe id="i" src="/common/blank.html"></iframe>
   7
   8 <script>
   9 promise_test(async t => {
  10   await new Promise(resolve => window.onload = resolve);
  11
  12   let navigateEventCount = 0;
  13   i.contentWindow.navigation.onnavigate = () => navigateEventCount++;
  14   i.contentWindow.navigation.onnavigatesuccess = t.unreached_func("onnavigatesuccess should not be called");
  15   i.contentWindow.navigation.onnavigateerror = t.unreached_func("onnavigateerror should not be called");
  16
  17   let assertionPromise;
  18   // The iframe does not have sticky activation, so per
  19   // https://html.spec.whatwg.org/#prompt-to-unload-a-document, no prompt is
  20   // shown and the navigation will proceed.
  21   i.contentWindow.onbeforeunload = t.step_func(() => {
  22     assertionPromise = assertBothRejectDOM(t, i.contentWindow.navigation.traverseTo(i.contentWindow.navigation.currentEntry.key), "InvalidStateError", i.contentWindow);
  23   });
  24   i.contentWindow.navigation.navigate("?1");
  25
  26   assert_not_equals(assertionPromise, undefined);
  27   await assertionPromise;
  28
  29   assert_equals(navigateEventCount, 1);
  30 }, "traverseTo() inside onbeforeunload");
  31 </script>