void returnsFour_whenStructureSizeIsFour(int start) throws Exception {
            // Arrange: build a buffer that has the little-endian value 4 at 'start'
            int len = start + 2; // need at least two bytes from start
            byte[] buffer = new byte[len + 3];
            SMBUtil.writeInt2(4, buffer, start);
            Smb2LogoffResponse resp = newResponse();

            // Act

        byte[] buffer = new byte[28];
        Arrays.fill(buffer, 0, 24, (byte) 0xAA);

        // Decode with len = 24 (minimum valid)
        int bytesConsumed = response.decode(buffer, 0, 24);

        // Verify - should consume 28 bytes even though len is 24
        assertEquals(28, bytesConsumed, "Should consume 28 bytes");

        byte[] resumeKey = response.getResumeKey();

        return this.data;
    }

    /**
     * {@inheritDoc}
     *
     * @see Decodable#decode(byte[], int, int)
     */
    @Override
    public int decode(final byte[] buffer, int bufferIndex, final int len) throws SMBProtocolDecodingException {
        final int start = bufferIndex;
        this.namedPipeState = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;

    }
    int off = lowerIndex;
    int len = upperIndex - lowerIndex;
    ImmutableList<Range<K>> subRanges =
        new ImmutableList<Range<K>>() {
          @Override
          public int size() {
            return len;
          }

          @Override
          public Range<K> get(int index) {
            checkElementIndex(index, len);
            if (index == 0 || index == len - 1) {

        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) {

     * @param token the input token bytes
     * @param off offset into the token array
     * @param len length of token data
     * @return result token
     * @throws SmbException if an SMB protocol error occurs
     * @throws CIFSException if a general CIFS error occurs
     */
    byte[] initSecContext(byte[] token, int off, int len) throws CIFSException;

    /**
     * Gets the NetBIOS name of the remote endpoint.

     * @param len length of data to read
     * @return number of bytes read
     */
    protected abstract int readSetupWireFormat(byte[] buffer, int bufferIndex, int len);

    /**
     * Reads parameters from wire format
     * @param buffer source buffer
     * @param bufferIndex starting index in source buffer
     * @param len length of data to read
     * @return number of bytes read

        int readSetupWireFormat(byte[] buffer, int bufferIndex, int len) {
            return 0;
        }

        @Override
        int writeParametersWireFormat(byte[] dst, int dstIndex) {
            // Dummy implementation for testing
            return 0;
        }

        @Override
        int readParametersWireFormat(byte[] buffer, int bufferIndex, int len) {
            return 0;
        }

        @Override

        protected int readSetupWireFormat(byte[] buffer, int bufferIndex, int len) {
            return 0;
        }

        @Override
        protected int readParametersWireFormat(byte[] buffer, int bufferIndex, int len) {
            return 0;
        }

        @Override
        protected int readDataWireFormat(byte[] buffer, int bufferIndex, int len) {
            return 0;
        }

        // Helper methods for testing

    @Override
    public int bits() {
      return 32;
    }

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