}

        @Test
        @DisplayName("Should not modify buffer beyond encoded area")
        void testEncodeDoesNotModifyBeyondArea() {
            // Given
            byte testByte = (byte) 0xFF;
            java.util.Arrays.fill(buffer, testByte);
            SrvCopychunk chunk = new SrvCopychunk(1024, 2048, 4096);

            // When
            chunk.encode(buffer, startIndex);

            // Then

    void testSpecialFileIdPatterns() {
        // Test various special patterns
        byte[] allZeros = new byte[16];
        byte[] allOnes = new byte[16];
        Arrays.fill(allOnes, (byte) 0xFF);
        byte[] alternating = new byte[16];
        for (int i = 0; i < alternating.length; i++) {
            alternating[i] = (byte) (i % 2 == 0 ? 0xAA : 0x55);
        }

        // Given
        byte[] buffer = new byte[256];
        // Fill buffer with test pattern
        for (int i = 0; i < buffer.length; i++) {
            buffer[i] = (byte) (i & 0xFF);
        }
        byte[] originalBuffer = buffer.clone();

        // When
        int bytesWritten = response.writeBytesWireFormat(buffer, 10);

        // Then
        assertEquals(0, bytesWritten);

     */
    public SID getSID() {
        return sid;
    }

    int decode(final byte[] buf, int bi) {
        allow = buf[bi] == (byte) 0x00;
        bi++;
        flags = buf[bi++] & 0xFF;
        final int size = ServerMessageBlock.readInt2(buf, bi);
        bi += 2;
        access = ServerMessageBlock.readInt4(buf, bi);
        bi += 4;
        sid = new SID(buf, bi);
        return size;
    }

    @Override
    public int read() throws IOException {
        // need oplocks to cache otherwise use BufferedInputStream
        if (read(tmp, 0, 1) == -1) {
            return -1;
        }
        return tmp[0] & 0xFF;
    }

    /**
     * Reads up to b.length bytes of data from this input stream into an array of bytes.
     *
     * @throws IOException if a network error occurs
     */

    @Override

        // Arrange
        nodeStatusRequest = new NodeStatusRequest(mockConfig, mockName);
        byte[] dst = new byte[100];
        int originalHexCode = 0xFF;
        mockName.hexCode = originalHexCode;

        // Create a spy to capture the state during writeQuestionSectionWireFormat
        NodeStatusRequest spyRequest = spy(nodeStatusRequest);

        @DisplayName("Should handle large buffer decoding")
        void testLargeBufferDecode() throws SMBProtocolDecodingException {
            byte[] largeBuffer = new byte[65536];
            Arrays.fill(largeBuffer, (byte) 0xFF);

            TestCreateContextResponse response = new TestCreateContextResponse("LARGE_BUFFER_TEST".getBytes(StandardCharsets.UTF_8));

            int result = response.decode(largeBuffer, 1000, 5000);

     * @return the unsigned byte value as an integer
     * @throws IOException if an I/O error occurs
     */
    public int readUnsignedByte() throws IOException {
        return readByte() & 0xff;
    }

    /**
     * Reads an unsigned 32-bit integer value.
     * @return the unsigned integer value as a long
     * @throws IOException if an I/O error occurs
     */

    // codePoint has at most 21 bits
    return ((0xFL << 4) | (codePoint >>> 18))
        | ((0x80L | (0x3F & (codePoint >>> 12))) << 8)
        | ((0x80L | (0x3F & (codePoint >>> 6))) << 16)
        | ((0x80L | (0x3F & codePoint)) << 24);
  }

  private static long charToThreeUtf8Bytes(char c) {
    return ((0x7L << 5) | (c >>> 12))
        | ((0x80 | (0x3F & (c >>> 6))) << 8)
        | ((0x80 | (0x3F & c)) << 16);
  }

        request = new Smb2SetInfoRequest(mockConfig);

        // Set all fields
        byte[] newFileId = new byte[16];
        for (int i = 0; i < 16; i++) {
            newFileId[i] = (byte) (0xFF - i);
        }
        request.setFileId(newFileId);
        request.setInfoType((byte) 0x02);
        request.setFileInfoClass((byte) 0x08);
        request.setAdditionalInformation(0xABCDEF00);