@Test
 public void getInfo() throws IOException {
   addObject("object1", new byte[] {0x01, 0x02, 0x03});
   addObject("object2", new byte[] {0x01, 0x02});
   addObject("object3", new byte[] {0x01, 0x02, 0x03, 0x04, 0x05});
   assertEquals(10, container.getBytesUsed());
   assertEquals(3, container.getCount());
 }
 @Test
 public void numberOfObjects() throws IOException {
   addObjects(3);
   assertEquals(3, container.getCount());
 }