@Test
 public void testPeak() throws InterruptedException {
   final IQueue q = client.getQueue(randomString());
   q.offer(1);
   assertEquals(1, q.peek());
   assertEquals(1, q.peek());
   assertEquals(1, q.size());
 }
 @Test
 public void testEmptyPeak() throws InterruptedException {
   final IQueue q = client.getQueue(randomString());
   assertNull(q.peek());
 }