SrvCopychunk chunk = new SrvCopychunk(100, 200, 300);

            // When
            SrvCopychunkCopy copy = new SrvCopychunkCopy(sourceKey, chunk);

            // Then
            assertNotNull(copy);
        }

        @Test
        @DisplayName("Should create instance with source key and multiple chunks")
        void testConstructorWithMultipleChunks() {
            // Given

        // Then
        assertEquals(0x39, msrpcSamrConnect2.getOpnum(), "Should have opnum 0x39 from parent class");
    }

    @Test
    @DisplayName("Should work with null server name")
    void shouldHandleNullServerName() {
        // When
        MsrpcSamrConnect2 msrpcSamrConnect2 = new MsrpcSamrConnect2(null, testAccess, mockPolicyHandle);

        // Then

        byte[] md5Hash = md5.digest(emptyData);

        // Then
        assertNotNull(md4Hash);
        assertNotNull(md5Hash);
        assertEquals(16, md4Hash.length);
        assertEquals(16, md5Hash.length);
    }

    @Test
    @DisplayName("Should handle null input gracefully")
    void testNullInputHandling() {
        // When/Then
        assertThrows(NullPointerException.class, () -> {

        when(mockTreeHandle.isSMB2()).thenReturn(true);
        when(mockTreeHandle.getSendBufferSize()).thenReturn(65536);
        when(mockFileHandle.isValid()).thenReturn(false, true); // First false to trigger ensureOpen, then true
        when(mockFileHandle.getFileId()).thenReturn(new byte[16]);
        when(mockFileHandle.acquire()).thenReturn(mockFileHandle);

        // Mock for ensureOpen to reopen file

/**
 * Represents a Kerberos authentication token.
 */
public class KerberosToken {

    private KerberosApRequest apRequest;

    /**
     * Constructs a KerberosToken from token bytes.
     *
     * @param token the token bytes
     * @throws PACDecodingException if token decoding fails
     */
    public KerberosToken(byte[] token) throws PACDecodingException {
        this(token, null);
    }

    /**

     *
     * @param authType the type of authorization data
     * @param token the authorization data token
     * @param keys the Kerberos keys for decryption
     * @return a list of parsed authorization data
     * @throws PACDecodingException if the data cannot be decoded
     */
    public static List<KerberosAuthData> parse(int authType, byte[] token, Map<Integer, KerberosKey> keys) throws PACDecodingException {

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

    @Test
    @DisplayName("Should handle empty byte array")
    void testToHexStringEmpty() {
        // Given
        byte[] data = {};

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

        // Then
        assertNotNull(result);

        // Then
        assertEquals(0, result);
    }

    /**
     * Test of toString method
     */
    @Test
    public void testToString() {
        // Given
        SmbComWriteAndXResponse instance = new SmbComWriteAndXResponse(config);

        // When
        String result = instance.toString();

        // Then
        assertNotNull(result);

     */
    @Test
    public void testBufferSizeValidation() {
        // When - Get a buffer
        byte[] buffer = BufferCache.getBuffer();

        // Then - Buffer should have expected size
        assertNotNull(buffer, "Buffer should not be null");
        assertEquals(SmbComTransaction.TRANSACTION_BUF_SIZE, buffer.length, "Buffer should have TRANSACTION_BUF_SIZE");

        CIFSException exception = new CIFSException(cause);

        // Then
        assertNotNull(exception);
        assertEquals(cause, exception.getCause());
        assertTrue(exception.getMessage().contains("Root cause"));
    }

    @Test
    @DisplayName("Should handle null message")
    void testNullMessage() {
        // When/Then
        assertDoesNotThrow(() -> {