assertEquals("123 abc", documentHelper.getContent(null, responseData, " 123\nabc ", dataMap));
        assertEquals("123abc", documentHelper.getContent(null, responseData, " 123abc ", dataMap));

        assertEquals("!!", documentHelper.getContent(null, responseData, "!!!", dataMap));
        assertEquals("//", documentHelper.getContent(null, responseData, "///", dataMap));

        QueryBuilder builder = queryProcessor.execute(context, prefixQuery, 1.0f);

        assertNotNull(builder);
        assertTrue(builder instanceof MatchPhrasePrefixQueryBuilder);

        MatchPhrasePrefixQueryBuilder mpqb = (MatchPhrasePrefixQueryBuilder) builder;
        assertEquals("test-123_abc", mpqb.value());

    void testToHexChars() {
        // Test integer conversion
        char[] dst1 = new char[8];
        Hexdump.toHexChars(0x1234ABCD, dst1, 0, 8);
        assertEquals("1234ABCD", new String(dst1));

        // Test with smaller size
        char[] dst2 = new char[4];
        Hexdump.toHexChars(0xABCD, dst2, 0, 4);
        assertEquals("ABCD", new String(dst2));

   */
  @Override
  public String toString() {
    return super.toString();
  }

  /**
   * Returns the Java Unicode escape sequence for the given {@code char}, in the form "\u12AB" where
   * "12AB" is the four hexadecimal digits representing the 16-bit code unit.
   */
  private static String showCharacter(char c) {
    String hex = "0123456789ABCDEF";
    char[] tmp = {'\\', 'u', '\0', '\0', '\0', '\0'};