@Test
 public void isEmpty() {
   HazelcastClient hClient = getHazelcastClient();
   IMap map = hClient.getMap("isEmpty");
   int counter = 100;
   assertTrue(map.isEmpty());
   for (int i = 0; i < counter; i++) {
     assertNull(map.put(i, i));
     assertEquals(i, map.get(i));
   }
   assertFalse(map.isEmpty());
 }
 @Test
 public void iterateOverMapEntries() {
   HazelcastClient hClient = getHazelcastClient();
   IMap<String, String> map = hClient.getMap("iterateOverMapEntries");
   map.put("1", "A");
   map.put("2", "B");
   map.put("3", "C");
   Set<Entry<String, String>> entrySet = map.entrySet();
   assertEquals(3, entrySet.size());
   Set<String> keySet = map.keySet();
   for (Entry<String, String> entry : entrySet) {
     assertTrue(keySet.contains(entry.getKey()));
     assertEquals(entry.getValue(), map.get(entry.getKey()));
   }
   Iterator<Entry<String, String>> it = entrySet.iterator();
   for (String key : keySet) {
     MapEntry mapEntry = map.getMapEntry(key);
     assertEquals(1, mapEntry.getHits());
   }
   while (it.hasNext()) {
     it.next();
     it.remove();
   }
   assertTrue(map.isEmpty());
 }