assertNull(map.get(keyOne));
        assertEquals(1, map.size());
        assertNull(segment.getKeyReferenceQueueForTesting().poll());
      }
    }
  }

  public void testDrainValueReferenceQueueOnWrite() {
    for (MapMaker maker : allWeakValueStrengthMakers()) {
      MapMakerInternalMap<Object, Object, ?, ?> map = makeMap(maker.concurrencyLevel(1));
      if (maker.getValueStrength() == Strength.WEAK) {

        assertNull(map.get(keyOne));
        assertEquals(1, map.size());
        assertNull(segment.getKeyReferenceQueueForTesting().poll());
      }
    }
  }

  public void testDrainValueReferenceQueueOnWrite() {
    for (MapMaker maker : allWeakValueStrengthMakers()) {
      MapMakerInternalMap<Object, Object, ?, ?> map = makeMap(maker.concurrencyLevel(1));
      if (maker.getValueStrength() == Strength.WEAK) {

        assertNull(map.get(keyOne));
        assertEquals(1, map.size());
        assertNull(segment.keyReferenceQueue.poll());
      }
    }
  }

  public void testDrainValueReferenceQueueOnWrite() {
    for (CacheBuilder<Object, Object> builder : allKeyValueStrengthMakers()) {
      LocalCache<Object, Object> map = makeLocalCache(builder.concurrencyLevel(1));
      if (map.usesValueReferences()) {