*
     * @return The stopword as a string.
     */
    public String toLineString() {
        if (isUpdated()) {
            return StringUtils.join(newInput);
        }
        return StringUtils.join(input);
    }

    ListenableFuture<?> future = executor.submit(incrementTask);
    assertTrue(future.isDone());
    assertListenerRunImmediately(future);
    assertEquals(1, threadLocalCount.get().intValue());
    otherThread.join(1000);
    assertEquals(Thread.State.TERMINATED, otherThread.getState());
    Throwable throwable = throwableFromOtherThread.get();
    assertNull(
        "Throwable from other thread: "

    assertThat(Doubles.join(",", EMPTY)).isEmpty();
    assertThat(Doubles.join(",", ARRAY1)).isEqualTo("1.0");
    assertThat(Doubles.join(",", 1.0, 2.0)).isEqualTo("1.0,2.0");
    assertThat(Doubles.join("", 1.0, 2.0, 3.0)).isEqualTo("1.02.03.0");
  }

  public void testJoinNonTrivialDoubles() {
    assertThat(Doubles.join(",", EMPTY)).isEmpty();
    assertThat(Doubles.join(",", 1.2)).isEqualTo("1.2");

                return Map.of();
            }
        }.getChildUrlRules(null, null).map(v -> v.getFirst() + ":" + v.getSecond()).collect(Collectors.joining(",")));
        assertEquals("//A:href", new FessXpathTransformer() {
            protected Map<String, String> getConfigPrameterMap(final ResponseData responseData, final ConfigName config) {

    Thread thread1 = new Thread(execute);
    Thread thread2 = new Thread(execute);
    thread1.start();
    thread2.start();
    assertEquals(0, runCalled.get());
    okayToRun.countDown();
    thread1.join();
    thread2.join();
    assertEquals(1, runCalled.get());
  }

  public void testAddAfterRun() throws Exception {
    // Run the previous test
    testRunOnPopulatedList();

    assertSame(defaultThread.getUncaughtExceptionHandler(), thread.getUncaughtExceptionHandler());

    assertFalse(completed);
    thread.start();
    thread.join();
    assertTrue(completed);

    // Creating a new thread from the same ThreadFactory will have the same
    // pool ID but a thread ID of 2.
    Thread thread2 = threadFactory.newThread(monitoredRunnable);

        final String code = Arrays.stream(langFields)
                .map(s -> "ctx._source['" + s + "_'+ctx._source." + langField + "]=ctx._source." + s)
                .collect(Collectors.joining(";"));
        if (logger.isDebugEnabled()) {
            logger.debug("reindex script: {}", code);
        }
        return "if(ctx._source." + langField + "!=null){" + code + "}";
    }

    public void tearDown() throws Exception {
        if (indexUpdater != null && indexUpdater.isAlive()) {
            indexUpdater.setFinishCrawling(true);
            indexUpdater.interrupt();
            indexUpdater.join(1000);
        }
        super.tearDown();
    }

    // Test initialization
    public void test_init() {
        indexUpdater.init();
        assertNotNull(indexUpdater);
    }

    return join(partsList);
  }

  /**
   * Returns a string containing the string representation of each argument, using the previously
   * configured separator between each.
   */
  public final String join(
      @Nullable Object first, @Nullable Object second, @Nullable Object... rest) {
    return join(iterable(first, second, rest));
  }

  /**

  }

  public void testJoin() {
    assertThat(Chars.join(",", EMPTY)).isEmpty();
    assertThat(Chars.join(",", '1')).isEqualTo("1");
    assertThat(Chars.join(",", '1', '2')).isEqualTo("1,2");
    assertThat(Chars.join("", '1', '2', '3')).isEqualTo("123");
  }

  public void testLexicographicalComparator() {
    List<char[]> ordered =