@Test
public void testDeleteData() {

  AbstractCacheWrapper uut = new AbstractCacheWrapper(entries, storageAll, 20000,
      predicate -> true);
  uut.cacheData(c0);
  uut.cacheData(c1);
  assertTrue(uut.deleteData(c0));
  assertFalse(uut.deleteData(c0));
  assertTrue(uut.deleteData(c1));
  assertFalse(uut.deleteData(c1));
}