@Test
public void testAppend() throws Exception
{

    doReturn( SubutaiAppender.MIN_REPORT_LOG_LEVEL ).when( loggingEvent ).getLevel();
    doReturn( throwableInformation ).when( loggingEvent ).getThrowableInformation();
    doReturn( throwable ).when( throwableInformation ).getThrowable();
    subutaiAppender.listeners = Sets.newSet(listener);
    subutaiAppender.append( loggingEvent );
    verify( notifierPool ).execute( isA( Runnable.class ) );
}