@Test
public void onEviction() {

  Object key = new Object(), value = new Object();
  doNothing().when(asyncEvictionListener).save(key, value);
  asyncEvictionListener.onEviction(key, value);
  try {
    Thread.sleep(10);
  } catch (InterruptedException e) {
  }
  verify(asyncEvictionListener).save(key, value);
}