@Test
 public void testAddItemIPlayItem() {
   System.out.println("testAddItemIPlayItem");
   SimplePlayItem item = new SimplePlayItem();
   item.setName("IronMan.flv");
   pss.addItem(item);
 }
 @Test
 public void testStart() {
   System.out.println("testStart");
   SimplePlayItem item = new SimplePlayItem();
   item.setName("DarkKnight.flv");
   pss.addItem(item);
   pss.start();
 }