/**
   * Returns an immutable {@link ByteSource} that contains no bytes.
   *
   * @since 15.0
   */
  public static ByteSource empty() {
    return EmptyByteSource.INSTANCE;
  }

  /**
   * A char source that reads bytes from this source and decodes them as characters using a charset.
   */
  class AsCharSource extends CharSource {

    final Charset charset;

    AsCharSource(Charset charset) {

     */
    protected static String toPlainPattern(final String pattern) {
        final StringBuilder buf = new StringBuilder(pattern.length());
        for (int i = 0; i < pattern.length(); ++i) {
            final char ch = pattern.charAt(i);
            if (Character.isLetterOrDigit(ch) || Character.isWhitespace(ch)) {
                buf.append(ch);
            }
        }
        if (buf.indexOf("yy") == -1) {

        public Appendable append(@Nullable CharSequence csq, int start, int end)
            throws IOException {
          throw new IOException();
        }

        @Override
        public Appendable append(char c) throws IOException {
          throw new IOException();
        }
      };

  private static void checkResult(Joiner joiner, Iterable<Integer> parts, String expected) {

     * @throws EmptyArgumentException
     *             If the argument is <code>null</code> or an empty array.
     */
    public static void assertArgumentNotEmpty(final String argName, final char[] argValue) {
        if (ArrayUtil.isEmpty(argValue)) {
            throw new EmptyArgumentException(argName, "ECL0011", asArray(argName));
        }
    }

    /**

            throw new SmbException(fieldName + " contains null bytes");
        }

        // Check for control characters
        for (int i = 0; i < str.length(); i++) {
            char c = str.charAt(i);
            if (c < 0x20 && c != '\t' && c != '\r' && c != '\n') {
                failedValidations.incrementAndGet();
                log.warn("{} contains control characters", fieldName);

        Integer.class,
        long.class,
        Long.class,
        short.class,
        Short.class,
        byte.class,
        Byte.class,
        boolean.class,
        Boolean.class,
        char.class,
        Character.class,
        int[].class,
        Object[].class,
        UnsignedInteger.class,
        UnsignedLong.class,
        BigInteger.class,
        BigDecimal.class,

      }
    }
  }

  @AndroidIncompatible // slow
  @GwtIncompatible // Floats.tryParse
  public void testTryParseAllCodePoints() {
    // Exercise non-ASCII digit test cases and the like.
    char[] tmp = new char[2];
    for (int i = Character.MIN_CODE_POINT; i < Character.MAX_CODE_POINT; i++) {
      Character.toChars(i, tmp, 0);
      checkTryParse(String.copyValueOf(tmp, 0, Character.charCount(i)));
    }
  }

      }
    }
  }

  @AndroidIncompatible // slow
  @GwtIncompatible // Floats.tryParse
  public void testTryParseAllCodePoints() {
    // Exercise non-ASCII digit test cases and the like.
    char[] tmp = new char[2];
    for (int i = Character.MIN_CODE_POINT; i < Character.MAX_CODE_POINT; i++) {
      Character.toChars(i, tmp, 0);
      checkTryParse(String.copyValueOf(tmp, 0, Character.charCount(i)));
    }
  }

     */
    private String createTestString(int length) {
        StringBuilder sb = new StringBuilder(length);
        for (int i = 0; i < length; i++) {
            sb.append((char) ('A' + (i % 26)));
        }
        return sb.toString();
    }

    /**
     * Helper method to create a mock Type 2 message with target information for NTLMv2
     */

      try (Reader reader = java.nio.file.Files.newBufferedReader(file, UTF_8)) {
        StringBuilder builder = new StringBuilder();
        for (int c = reader.read(); c != -1; c = reader.read()) {
          builder.append((char) c);
        }
        return builder.toString();
      }
    }
  }