for (LoadingCache<Object, Object> cache : caches()) {
      Set<Object> keys = cache.asMap().keySet();
      assertFalse(keys.remove(null));
      assertFalse(keys.remove(6));
      assertFalse(keys.remove(-6));
      assertFalse(keys.removeAll(asList(null, 0, 15, 1500)));
      assertFalse(keys.retainAll(asList(null, 0, 15, 1500)));
      checkEmpty(keys);
      checkEmpty(cache);
    }
  }

    b = asList(4, 8, 15, 16, 23, 42);
    assertFalse(Iterators.elementsEqual(a.iterator(), b.iterator()));
    assertFalse(Iterators.elementsEqual(b.iterator(), a.iterator()));

    // Different lengths, one is empty.
    a = Collections.emptySet();
    b = asList(4, 8, 15, 16, 23, 42);
    assertFalse(Iterators.elementsEqual(a.iterator(), b.iterator()));
    assertFalse(Iterators.elementsEqual(b.iterator(), a.iterator()));
  }

    assertEquals(control("bar", 2), entry("bar", 2));
    assertFalse(control("foo", 1).equals(entry("foo", 2)));
    assertFalse(entry("foo", 1).equals(control("bar", 1)));
    assertFalse(entry("foo", 1).equals(new Object()));
    assertFalse(entry("foo", 1).equals(null));
  }

  public void testEqualsNull() {
    assertEquals(control(NE, 1), entry(NE, 1));
    assertFalse(control(NE, 1).equals(entry(NE, 2)));

    assertFalse(InetAddresses.isUriInetAddress("[192.168.1.1"));
    assertFalse(InetAddresses.isUriInetAddress("192.168.1.1]"));
    assertFalse(InetAddresses.isUriInetAddress(""));
    assertFalse(InetAddresses.isUriInetAddress("192.168.999.888"));
    assertFalse(InetAddresses.isUriInetAddress("www.google.com"));
    assertFalse(InetAddresses.isUriInetAddress("1:2e"));

  }

  public void testContains() {
    assertTrue(testTable.contains('a', 1));
    assertFalse(testTable.contains('a', 2));
    assertFalse(testTable.contains('A', 1));
    assertFalse(testTable.contains('A', 2));
  }

  public void testContainsColumn() {
    assertTrue(testTable.containsColumn(1));
    assertFalse(testTable.containsColumn(2));
  }

  public void testContainsRow() {

    map.remove("a");
    assertFalse(underlying.containsKey("a"));

    Set<String> keys = map.keySet();
    keys.remove("b");
    assertFalse(underlying.containsKey("b"));

    Iterator<String> keyIterator = keys.iterator();
    keyIterator.next();
    keyIterator.remove();
    assertFalse(underlying.containsKey("c"));

    Collection<String> values = map.values();

        Object key = warmed.get(i - WARMUP_MIN).getKey();
        Object value = warmed.get(i - WARMUP_MIN).getValue();
        assertFalse(cache.asMap().remove(key, -1));
        assertTrue(cache.asMap().remove(key, value));
        assertFalse(cache.asMap().remove(key, -1));
        assertFalse(cache.asMap().containsKey(key));
      }
      checkEmpty(cache);
    }
  }


  public void testKeySet_populated() {

    assertEquals(1, listenerLatch.getCount());
    assertFalse(task.isDone());
    assertFalse(task.isCancelled());

    // Start the task to put it in the RUNNING state.  Have to use a separate
    // thread because the task will block on the task latch after unblocking
    // the run latch.
    exec.execute(task);
    runLatch.await();
    assertEquals(1, listenerLatch.getCount());
    assertFalse(task.isDone());

    assertEquals(0, stats.loadSuccessCount());
    assertEquals(0, stats.loadExceptionCount());
    assertEquals(0, stats.hitCount());
    assertNull(cache.asMap().get(one));
    assertFalse(cache.asMap().containsKey(one));
    assertFalse(cache.asMap().containsValue(two));

    assertNull(cache.getIfPresent(two));
    stats = cache.stats();
    assertEquals(2, stats.missCount());
    assertEquals(0, stats.loadSuccessCount());

    assertEquals(0, stats.loadSuccessCount());
    assertEquals(0, stats.loadExceptionCount());
    assertEquals(0, stats.hitCount());
    assertNull(cache.asMap().get(one));
    assertFalse(cache.asMap().containsKey(one));
    assertFalse(cache.asMap().containsValue(two));

    assertNull(cache.getIfPresent(two));
    stats = cache.stats();
    assertEquals(2, stats.missCount());
    assertEquals(0, stats.loadSuccessCount());