testThreshold(1000, 100, false, true);
  }

  static void write(OutputStream out, byte[] b, int off, int len, boolean singleByte)
      throws IOException {
    if (singleByte) {
      for (int i = off; i < off + len; i++) {
        out.write(b[i]);
      }
    } else {
      out.write(b, off, len);
    }
    out.flush(); // for coverage
  }

          checkPositionIndexes(off, off + len, buf.length);

          int i = off;
          for (; i < off + len; i++) {
            int b = read();
            if (b == -1) {
              int read = i - off;
              return read == 0 ? -1 : read;
            }
            buf[i] = (byte) b;
          }
          return i - off;
        }

        @Override

    }

    @Override
    public void write(char[] cbuf, int off, int len) {
      checkPositionIndexes(off, off + len, cbuf.length);
    }

    @Override
    public void write(String str) {
      checkNotNull(str);
    }

    @Override
    public void write(String str, int off, int len) {
      checkPositionIndexes(off, off + len, str.length());
    }

    @Override

    assertEquals(
        hashFunction.hashBytes(bytes), hashFunction.newHasher(size).putBytes(bytes).hash());
    int off = random.nextInt(size);
    int len = random.nextInt(size - off);
    assertEquals(
        hashFunction.hashBytes(bytes, off, len),
        hashFunction.newHasher(size).putBytes(bytes, off, len).hash());
  }

  private static void assertHashByteBufferEquivalence(HashFunction hashFunction, Random random) {

                                        <la:select styleId="logLevel" property="logLevel" styleClass="form-control">
                                            <la:option value="OFF">OFF</la:option>
                                            <la:option value="FATAL">FATAL</la:option>
                                            <la:option value="ERROR">ERROR</la:option>

     * @param off the start offset in array b at which the data is written
     * @param len the maximum number of bytes to read
     * @return the total number of bytes read into the buffer, or -1 if there is no more data
     * @throws IOException if an I/O error occurs
     */
    @Override
    public int read(final byte[] b, final int off, final int len) throws IOException {

    assertEquals(
        hashFunction.hashBytes(bytes), hashFunction.newHasher(size).putBytes(bytes).hash());
    int off = random.nextInt(size);
    int len = random.nextInt(size - off);
    assertEquals(
        hashFunction.hashBytes(bytes, off, len),
        hashFunction.newHasher(size).putBytes(bytes, off, len).hash());
  }

  private static void assertHashByteBufferEquivalence(HashFunction hashFunction, Random random) {

    testThreshold(1000, 100, false, true);
  }

  static void write(OutputStream out, byte[] b, int off, int len, boolean singleByte)
      throws IOException {
    if (singleByte) {
      for (int i = off; i < off + len; i++) {
        out.write(b[i]);
      }
    } else {
      out.write(b, off, len);
    }
    out.flush(); // for coverage
  }

      ensureCapacity(Byte.BYTES);
      buffer.put(b);
      return this;
    }

    @Override
    public Hasher putBytes(byte[] bytes, int off, int len) {
      ensureCapacity(len);
      buffer.put(bytes, off, len);
      return this;
    }

    @Override
    public Hasher putBytes(ByteBuffer bytes) {
      ensureCapacity(bytes.remaining());
      buffer.put(bytes);

  private static class Control extends AbstractNonStreamingHashFunction {
    @Override
    public HashCode hashBytes(byte[] input, int off, int len) {
      return HashCode.fromBytes(Arrays.copyOfRange(input, off, off + len));
    }

    @Override
    public int bits() {
      throw new UnsupportedOperationException();
    }
  }