public void testThrowableContent() throws Exception {
// create hierarchy
final Exception e_pre = new Exception("e");
e_pre.fillInStackTrace();
final HandlerException he1_pre = new HandlerException(e_pre);
he1_pre.fillInStackTrace();
final RuntimeException re_pre = new RuntimeException("re", he1_pre);
re_pre.fillInStackTrace();
final SwitchYardException sye_pre = new SwitchYardException("sye", re_pre);
sye_pre.fillInStackTrace();
final HandlerException he2_pre = new HandlerException("he", sye_pre);