* related commands can be batched together in a single message for improved efficiency.
 */
public abstract class AndXServerMessageBlock extends ServerMessageBlock {

    private static final Logger log = LoggerFactory.getLogger(AndXServerMessageBlock.class);

    private static final int ANDX_COMMAND_OFFSET = 1;
    private static final int ANDX_RESERVED_OFFSET = 2;

import jcifs.smb1.util.Hexdump;

abstract class AndXServerMessageBlock extends ServerMessageBlock {

    private static final int ANDX_COMMAND_OFFSET = 1;
    private static final int ANDX_RESERVED_OFFSET = 2;
    private static final int ANDX_OFFSET_OFFSET = 3;

    private byte andxCommand = (byte) 0xFF;
    private int andxOffset = 0;

    ServerMessageBlock andx = null;

    AndXServerMessageBlock() {
    }

import org.junit.jupiter.api.Test;

/**
 * JUnit 5 tests for AndXServerMessageBlock in legacy smb1 package.
 *
 * The tests use small stub subclasses to drive encode/decode paths and
 * validate batching, chaining, signing, and NT_CREATE_ANDX extended handling.
 */
class AndXServerMessageBlockTest {

    /**
     * Test stub for AndXServerMessageBlock to control read/write logic.
     */

/**
 * Test class for AndXServerMessageBlock
 */
class AndXServerMessageBlockTest {

    @Mock
    private Configuration mockConfig;

    @Mock
    private ServerMessageBlock mockAndxCommand;

    @Mock
    private SMB1SigningDigest mockDigest;

    private TestAndXServerMessageBlock testBlock;

    /**
     * Test implementation of AndXServerMessageBlock for testing
     */

            if (LogStream.level >= 4) {
                do {
                    log.println(smb);
                } while (smb instanceof AndXServerMessageBlock && (smb = ((AndXServerMessageBlock) smb).andx) != null);
                if (LogStream.level >= 6) {
                    Hexdump.hexdump(log, BUF, 4, n);
                }
            }

     * returns bytes read and not the number of words(but the
     * wordCount member DOES store the number of words)) we
     * actually read. Incedentally this is important to the
     * AndXServerMessageBlock class that needs to potentially
     * read in another smb's parameter words and bytes based on
     * information in it's andxCommand, andxOffset, ...etc.
     */

     * returns bytes read and not the number of words(but the
     * wordCount member DOES store the number of words)) we
     * actually read. Incedentally this is important to the
     * AndXServerMessageBlock class that needs to potentially
     * read in another smb's parameter words and bytes based on
     * information in it's andxCommand, andxOffset, ...etc.
     */

    /**