appender.append(event);
        final List<LogNotificationEvent> events = ComponentUtil.getLogNotificationHelper().drainAll();
        assertEquals(0, events.size());
    }

    @Test
    public void test_append_fatalEvent() {
        final LogEvent event = createLogEvent(Level.FATAL, "org.codelibs.fess.test", "fatal error");
        appender.append(event);