result = KuromojiCSVUtil.parse(value);
        assertEquals(4, result.length);
        assertEquals("John Doe", result[0]);
        assertEquals("Software Engineer", result[1]);
        assertEquals("******@****.***", result[2]);
        assertEquals("\"Loves \"\"coding\"\" and coffee\"", result[3]);

    val headers =
      Headers
        .Builder()
        .add("content-length", "99")
        .add("authorization", "peanutbutter")
        .add("proxy-authorization", "chocolate")
        .add("cookie", "drink=coffee")
        .add("set-cookie", "accessory=sugar")
        .add("user-agent", "OkHttp")
        .build()
    val request =
      Request(
        "https://square.com".toHttpUrl(),
        headers,
      )

        Map<String, Object> docMap = new HashMap<>();
        docMap.put("_id", "docid1");
        docMap.put("url", "http://example.com");

        boolean result = thumbnailManager.offer(docMap);
        assertTrue(result);
    }

    // Test offer with no matching generator
    public void test_offer_noMatchingGenerator() {
        TestThumbnailGenerator generator = new TestThumbnailGenerator();
        generator.available = true;

    private final Deque<E> delegate = new LinkedList<>();
    private final Object mutex = new Object[0]; // something Serializable

    @Override
    public boolean offer(E o) {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.offer(o);
    }

    @Override
    public @Nullable E poll() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.poll();
    }

    @Override

 *
 * <p>This uses the same efficient implementation as {@link Ordering#leastOf(Iterable, int)},
 * offering expected O(n + k log k) performance (worst case O(n log k)) for n calls to {@link
 * #offer} and a call to {@link #topK}, with O(k) memory. In comparison, quickselect has the same
 * asymptotics but requires O(n) memory, and a {@code PriorityQueue} implementation takes O(n log

        return cipher;
    }

    /**
     * Offers an encryption cipher back to the queue.
     *
     * @param cipher
     *            the cipher to offer
     */
    protected void offerEncryptoCipher(final Cipher cipher) {
        encryptoQueue.offer(cipher);
    }

    /**
     * Polls a decryption cipher from the queue, creating a new one if none are available.
     *
     * @return a decryption cipher

    private final Deque<E> delegate = new LinkedList<>();
    private final Object mutex = new Object[0]; // something Serializable

    @Override
    public boolean offer(E o) {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.offer(o);
    }

    @Override
    public @Nullable E poll() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.poll();
    }

    @Override

        }

        final File thumbnailFile = thumbnailManager.getThumbnailFile(doc);
        if (thumbnailFile == null) {
            if (fessConfig.isThumbnailEnabled()) {
                thumbnailManager.offer(doc);
            }
            // 404
            throw responseManager.new404("Thumbnail for " + form.docId + " is under generating.");
        }

  }

  // BlockingQueue.take() tests
  public void testTakeWithNoWait() {
    Stopwatch stopwatch = Stopwatch.createStarted();
    BlockingQueue<String> queue = new ArrayBlockingQueue<>(1);
    assertTrue(queue.offer(""));
    assertEquals("", takeUninterruptibly(queue));
    assertTimeNotPassed(stopwatch, LONG_DELAY_MS);
  }

  public void testTakeNoInterrupt() {
    TimedTakeQueue queue = TimedTakeQueue.createWithDelay(20);

            final String thumbnailField = fessConfig.getIndexFieldThumbnail();
            docList.stream().forEach(doc -> {
                if (!thumbnailManager.offer(doc)) {
                    if (logger.isDebugEnabled()) {
                        logger.debug("Removing {}={} from doc[{}]", thumbnailField, doc.get(thumbnailField),