11cb0ef41Sopenharmony_ciasync_test(t => {
21cb0ef41Sopenharmony_ci  performance.mark('foo');
31cb0ef41Sopenharmony_ci  t.step_timeout(() => {
41cb0ef41Sopenharmony_ci    // After a timeout, PerformanceObserver should still receive entry if using the buffered flag.
51cb0ef41Sopenharmony_ci    new PerformanceObserver(t.step_func_done(list => {
61cb0ef41Sopenharmony_ci      const entries = list.getEntries();
71cb0ef41Sopenharmony_ci      assert_equals(entries.length, 1, 'There should be 1 mark entry.');
81cb0ef41Sopenharmony_ci      assert_equals(entries[0].entryType, 'mark');
91cb0ef41Sopenharmony_ci    })).observe({type: 'mark', buffered: true});
101cb0ef41Sopenharmony_ci  }, 100);
111cb0ef41Sopenharmony_ci}, 'PerformanceObserver with buffered flag sees entry after timeout');
12