// Verify little-endian encoding
        assertEquals((byte) 0xA1, encoded[0], "First byte of first character");
        assertEquals((byte) 0x00, encoded[1], "Second byte of first character");
        assertEquals((byte) 0xA2, encoded[2], "First byte of second character");
        assertEquals((byte) 0x00, encoded[3], "Second byte of second character");
    }

    @Test
    public void testAsciiEncoding() throws Exception {

     * The header format is:
     * - Byte 0: Message type (0x00 for SESSION_MESSAGE)
     * - Byte 1: High bit of 17-bit length field
     * - Bytes 2-3: Lower 16 bits of length field
     */
    private static byte[] messageHeader(int length) {
        byte[] h = new byte[4];
        h[0] = (byte) SessionServicePacket.SESSION_MESSAGE;
        h[1] = (byte) ((length >> 16) & 0x01);
        h[2] = (byte) ((length >> 8) & 0xFF);

@DisplayName("Hexdump Utility Tests")
class HexdumpTest extends BaseTest {

    @Test
    @DisplayName("Should convert byte array to hex string")
    void testToHexString() {
        // Given
        byte[] data = { 0x00, 0x0F, (byte) 0xFF, 0x7F, (byte) 0x80 };

        // When
        String result = Hexdump.toHexString(data);

        // Then
        assertNotNull(result);
        assertEquals("000FFF7F80", result);
    }

    void testConstructor() throws Exception {
        Trans2GetDfsReferral cmd = new Trans2GetDfsReferral("/file");
        assertEquals("/file", getPrivateField(cmd, "path"));
        assertEquals((byte) 0x00, getPrivateField(cmd, "maxSetupCount"));
        assertEquals(4096, getPrivateField(cmd, "maxDataCount"));
    }

    @Test
    @DisplayName("writeSetupWireFormat writes subCommand and padding")

        this.request = new DfsReferralRequestBuffer(filename, maxReferralLevel);
        this.totalDataCount = 0;
        this.maxParameterCount = 0;
        this.maxDataCount = 4096;
        this.maxSetupCount = (byte) 0x00;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.smb1.ServerMessageBlock#isForceUnicode()
     */
    @Override
    public boolean isForceUnicode() {
        return true;
    }

class Trans2FindFirst2 extends SmbComTransaction {

    // flags

    private static final int FLAGS_CLOSE_AFTER_THIS_REQUEST = 0x01;
    private static final int FLAGS_CLOSE_IF_END_REACHED = 0x02;
    private static final int FLAGS_RETURN_RESUME_KEYS = 0x04;
    private static final int FLAGS_RESUME_FROM_PREVIOUS_END = 0x08;
    private static final int FLAGS_FIND_WITH_BACKUP_INTENT = 0x10;

    private static final int DEFAULT_LIST_SIZE = 65535;

    }

    @Override
    int writeBytesWireFormat(final byte[] dst, int dstIndex) {
        final int start = dstIndex;

        dst[dstIndex] = (byte) 0x04;
        dstIndex++;
        dstIndex += writeString(oldFileName, dst, dstIndex);
        dst[dstIndex++] = (byte) 0x04;
        if (useUnicode) {
            dst[dstIndex++] = (byte) '\0';
        }
        dstIndex += writeString(newFileName, dst, dstIndex);

        return 0;
    }

    @Override
    int writeBytesWireFormat(final byte[] dst, int dstIndex) {
        final int start = dstIndex;

        dst[dstIndex] = (byte) 0x04;
        dstIndex++;
        dstIndex += writeString(path, dst, dstIndex);

        return dstIndex - start;
    }

    @Override
    int readParameterWordsWireFormat(final byte[] buffer, final int bufferIndex) {

        // Expected format: buffer format (1 byte) + file name (null-terminated)
        int expectedLength = 1 + TEST_FILE_NAME.length() + 1;
        assertEquals(expectedLength, bytesWritten);
        assertEquals(0x04, dst[0]); // Buffer format
        assertEquals(TEST_FILE_NAME, new String(dst, 1, TEST_FILE_NAME.length()));
    }

    @Test
    public void testReadParameterWordsWireFormat() {

        return 0;
    }

    @Override
    int readParameterWordsWireFormat(final byte[] buffer, int bufferIndex) {
        final int start = bufferIndex;
        isLoggedInAsGuest = ((buffer[bufferIndex] & 0x01) == 0x01) == true;
        bufferIndex += 2;
        if (extendedSecurity) {
            final int blobLength = readInt2(buffer, bufferIndex);
            bufferIndex += 2;
            blob = new byte[blobLength];
        }