public void testPut_nullKeySupportedPresent() {
    Entry<K, V> newEntry = entry(null, v3());
    initMapWithNullKey();
    assertEquals(
        "put(present, value) should return the associated value",
        getValueForNullKey(),
        put(newEntry));

    Entry<K, V>[] expected = createArrayWithNullKey();
    expected[getNullLocation()] = newEntry;
    expectContents(expected);
  }

    }
  }

  protected final void expectReplacement(Entry<K, V> newEntry) {
    List<Entry<K, V>> expected = Helpers.copyToList(getSampleElements());
    replaceValue(expected, newEntry);
    expectContents(expected);
  }

  private void replaceValue(List<Entry<K, V>> expected, Entry<K, V> newEntry) {
    for (ListIterator<Entry<K, V>> i = expected.listIterator(); i.hasNext(); ) {

  public void testPut_nullKeySupportedPresent() {
    Entry<K, V> newEntry = entry(null, v3());
    initMapWithNullKey();
    assertEquals(
        "put(present, value) should return the associated value",
        getValueForNullKey(),
        put(newEntry));

    Entry<K, V>[] expected = createArrayWithNullKey();
    expected[getNullLocation()] = newEntry;
    expectContents(expected);
  }

          ReferenceEntry<K, V> newNext,
          K key) {
        ReferenceEntry<K, V> newEntry = super.copyEntry(segment, original, newNext, key);
        copyAccessEntry(original, newEntry);
        copyWriteEntry(original, newEntry);
        return newEntry;
      }
    },
    WEAK {
      @Override
      <K, V> ReferenceEntry<K, V> newEntry(
          Segment<K, V> segment, K key, int hash, @CheckForNull ReferenceEntry<K, V> next) {

          ReferenceEntry<K, V> newNext,
          K key) {
        ReferenceEntry<K, V> newEntry = super.copyEntry(segment, original, newNext, key);
        copyAccessEntry(original, newEntry);
        copyWriteEntry(original, newEntry);
        return newEntry;
      }
    },
    WEAK {
      @Override
      <K, V> ReferenceEntry<K, V> newEntry(
          Segment<K, V> segment, K key, int hash, @CheckForNull ReferenceEntry<K, V> next) {

        if (Segment.isCollected(entry)) {
          return null;
        }
        StrongKeyWeakValueEntry<K, V> newEntry = newEntry(segment, entry.key, entry.hash, newNext);
        newEntry.valueReference = entry.valueReference.copyFor(segment.queueForValues, newEntry);
        return newEntry;
      }

      @Override
      public void setValue(

    }
  }

  protected final void expectReplacement(Entry<K, V> newEntry) {
    List<Entry<K, V>> expected = Helpers.copyToList(getSampleElements());
    replaceValue(expected, newEntry);
    expectContents(expected);
  }

  private void replaceValue(List<Entry<K, V>> expected, Entry<K, V> newEntry) {
    for (ListIterator<Entry<K, V>> i = expected.listIterator(); i.hasNext(); ) {

         *            要素
         * @return 追加されたエントリ
         */
        public Entry addBefore(final E o) {
            final Entry newEntry = new Entry(o, this, previous);
            previous.next = newEntry;
            previous = newEntry;
            ++size;
            return newEntry;
        }

    }

        }
      }

      ValueEntry<K, V> newEntry = new ValueEntry<>(key, value, smearedHash, rowHead);
      succeedsInValueSet(lastEntry, newEntry);
      succeedsInValueSet(newEntry, this);
      succeedsInMultimap(multimapHeaderEntry.getPredecessorInMultimap(), newEntry);
      succeedsInMultimap(newEntry, multimapHeaderEntry);
      hashTable[bucket] = newEntry;
      size++;
      modCount++;

    ReferenceEntry<Object, Object> entry = segment.getEntry(one, hash);
    ReferenceEntry<Object, Object> newEntry = segment.copyEntry(entry, null);
    table.set(index, newEntry);

    @SuppressWarnings("unchecked")
    LoadingValueReference<Object, Object> valueReference =
        (LoadingValueReference) newEntry.getValueReference();
    assertFalse(valueReference.futureValue.isDone());
    startSignal.countDown();