assertTrue(map.containsKey("2"));
    assertTrue(map.containsKey("3"));
    assertEquals(1L, map.get("1"));
    assertEquals(2L, map.get("2"));
    assertEquals(3L, map.get("3"));
  }

  public void testPutIfAbsent() {
    AtomicLongMap<String> map = AtomicLongMap.create();
    String key = "key";
    long newValue = random.nextInt(MAX_ADDEND);
    for (int i = 0; i < ITERATIONS; i++) {
      long before = map.get(key);