code: @Test public void testIteratorForAppenders() throws Exception {
    NOPAppender<TestEvent> ta=new NOPAppender<TestEvent>();
    ta.start();
    aai.addAppender(ta);
    NOPAppender<TestEvent> tab=new NOPAppender<TestEvent>();
    tab.setName("test");
    tab.start();
    aai.addAppender(tab);
    Iterator<Appender<TestEvent>> iter=aai.iteratorForAppenders();
    int size=0;
    while (iter.hasNext()) {
      ++size;
      Appender<TestEvent> app=iter.next();
      assertTrue("Bad Appender",app == ta || app == tab);
    }
    assertTrue("Incorrect number of appenders",size == 2);
  }
  