| <!doctype html> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <iframe id="i" src="/common/blank.html"></iframe> |
| <script> |
| test(t => { |
| let assertionHappened = false; |
| navigation.onnavigate = t.step_func_done(e => { |
| e.preventDefault(); |
| assert_throws_dom("InvalidStateError", () => e.transitionWhile(Promise.resolve())); |
| assertionHappened = true; |
| }); |
| |
| location.href = "#1"; |
| assert_true(assertionHappened); |
| }, "AppHistoryNavigateEvent's transitionWhile() throws if used on a canceled event"); |
| </script> |
