assertEquals(cause, exception.getCause());
    }

    public void test_constructor_withLongMessage() {
        // Test constructor with long message
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < 1000; i++) {
            sb.append("Long message content ");
        }
        String message = sb.toString();
        SearchEngineClientException exception = new SearchEngineClientException(message);

        // for performance, check digits instead of relying later on catching NumberFormatException
        if (!isDigits(s)) {
            return null;
        }

        try {
            long longValue = Long.parseLong(s);
            if (longValue > Integer.MAX_VALUE) {
                return null;
            }
            return (int) longValue;
        } catch (NumberFormatException e) {

        assertEquals("FF", Hexdump.toHexString(255, 2));
        assertEquals("1234", Hexdump.toHexString(0x1234, 4));
    }

    @Test
    @DisplayName("Should convert long to hex string with padding")
    void testLongToHexString() {
        // Test various long values
        assertEquals("0000000000000000", Hexdump.toHexString(0L, 16));
        assertEquals("00000000000000FF", Hexdump.toHexString(255L, 16));

 * @author Justin T. Sampson
 */
@NullUnmarked
public final class TestThread<L> extends Thread implements TearDown {

  private static final long DUE_DILIGENCE_MILLIS = 100;
  private static final long TIMEOUT_MILLIS = 5000;

  private final L lockLikeObject;

  private final SynchronousQueue<Request> requestQueue = new SynchronousQueue<>();

    //                                                                        ============

    private static OptionalEntity<RelatedContent> getEntity(final CreateForm form, final String username, final long currentTime) {
        switch (form.crudMode) {
        case CrudMode.CREATE:
            return OptionalEntity.of(new RelatedContent()).map(entity -> {
                entity.setCreatedBy(username);

        // Verify that exception is serializable
        assertTrue(exception instanceof java.io.Serializable);
    }

    public void test_longMessage() {
        // Setup - test with a very long message
        final StringBuilder longMessageBuilder = new StringBuilder();
        for (int i = 0; i < 1000; i++) {
            longMessageBuilder.append("Query segment ").append(i).append("; ");
        }

   */
  @JvmStatic
  fun fragmentBuffer(buffer: Buffer): Buffer {
    // Write each byte into a new buffer, then clone it so that the segments are shared.
    // Shared segments cannot be compacted so we'll get a long chain of short segments.
    val result = Buffer()
    while (!buffer.exhausted()) {
      val box = Buffer()
      box.write(buffer, 1)
      result.write(box.copy(), 1)
    }
    return result
  }

                }
            }

            @Override
            public Long getAsLong(String propertyKey) {
                String value = get(propertyKey);
                if (value == null) {
                    return null;
                }
                try {
                    return Long.valueOf(value);
                } catch (NumberFormatException e) {
                    return null;

        }
    }

    // Test implementation of FessUser interface
    private static class TestFessUser implements FessUser {
        private static final long serialVersionUID = 1L;
        private final String name;
        private final String[] roleNames;
        private final String[] groupNames;
        private final String[] permissions;

    private static class MockSystemHelper extends SystemHelper {
        @Override
        public long getCurrentTimeAsLong() {
            return System.currentTimeMillis();
        }

        @Override
        public String normalizeLang(String lang) {
            if ("en".equals(lang) || "ja".equals(lang)) {
                return lang;
            }
            return null;
        }

    }