byte[] b = inv.getArgument(0);
            int off = inv.getArgument(1);
            b[off] = 0x01;
            b[off + 1] = 0x02;
            b[off + 2] = 0x03;
            b[off + 3] = 0x04;
            return 4;
        }).when(raf).read(any(byte[].class), anyInt(), eq(4));
        assertEquals(0x01020304, raf.readInt());

        // long 0x0102030405060708L
        doAnswer(inv -> {

    assertThat(Ints.toByteArray(0x12131415)).isEqualTo(new byte[] {0x12, 0x13, 0x14, 0x15});
    assertThat(Ints.toByteArray(0xFFEEDDCC))
        .isEqualTo(new byte[] {(byte) 0xFF, (byte) 0xEE, (byte) 0xDD, (byte) 0xCC});
  }

  public void testFromByteArray() {
    assertThat(Ints.fromByteArray(new byte[] {0x12, 0x13, 0x14, 0x15, 0x33})).isEqualTo(0x12131415);

                (byte) 0x67, (byte) 0x45, (byte) 0x23,
                    (byte) 0x01, // up to here, same bytes as above
                (byte) 0x01, (byte) 0x02, (byte) 0x03, (byte) 0x04,
                (byte) 0x05, (byte) 0x06, (byte) 0x07, (byte) 0x08
              },
              0x89abcdef,
              0x0123456789abcdefL, // asInt/asLong as above, due to equal eight first bytes

        when(mockFile2.length()).thenReturn(0L);
        when(mockFile2.lastModified()).thenReturn(2000L);
        when(mockFile2.isDirectory()).thenReturn(true);
        when(mockFile2.getAttributes()).thenReturn(0x10);
        when(mockFile2.createTime()).thenReturn(600L);
        when(mockFile2.lastAccess()).thenReturn(900L);

        // Update cache
        List<SmbFile> files = Arrays.asList(mockFile1, mockFile2);

        smb.pid = 456;
        smb.tid = 789;
        smb.uid = 101;
        smb.flags2 = ServerMessageBlock.FLAGS2_UNICODE;
        smb.useUnicode = true;

        byte[] params = { 0x01, 0x02, 0x03, 0x04 };
        byte[] bytes = { 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F };
        smb.setParamWords(params);
        smb.setBytes(bytes);

        byte[] buffer = new byte[1024];
        int length = smb.encode(buffer, 0);

     */
    public static final byte SMB_COM_DELETE_DIRECTORY = (byte) 0x01;

    /**
     * SMB command to close a file handle.
     */
    public static final byte SMB_COM_CLOSE = (byte) 0x04;

    /**
     * SMB command to delete a file.
     */
    public static final byte SMB_COM_DELETE = (byte) 0x06;

    /**
     * SMB command to rename a file.
     */

        return Stream.of(Arguments.of(new byte[] {}, ""), Arguments.of(new byte[] { (byte) 0x00 }, "00"),
                Arguments.of(new byte[] { (byte) 0x0F }, "0f"), Arguments.of(new byte[] { (byte) 0x10 }, "10"),
                Arguments.of(new byte[] { (byte) 0xAB }, "ab"),
                Arguments.of(new byte[] { (byte) 0x7F, (byte) 0x80, (byte) 0xFF }, "7f80ff"));
    }

    @Mock
    private CommonServerMessageBlock message;

    private byte[] testData;

    @BeforeEach
    void setUp() {
        MockitoAnnotations.openMocks(this);
        testData = new byte[] { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 };
    }

    @Test
    @DisplayName("Test sign method with valid parameters")
    void testSignWithValidParameters() {
        // Arrange
        int offset = 0;

    @Test
    @DisplayName("Test FileInformation constants match SMB protocol values")
    void testFileInformationConstantsMatchProtocol() {
        // These values are defined in MS-FSCC specification
        assertEquals(0x04, FileInformation.FILE_BASIC_INFO);
        assertEquals(0x05, FileInformation.FILE_STANDARD_INFO);
        assertEquals(0x06, FileInformation.FILE_INTERNAL_INFO);
        assertEquals(10, FileInformation.FILE_RENAME_INFO);

        buffer[bufferIndex++] = (byte) 0x40;
        buffer[bufferIndex++] = 0;
        buffer[bufferIndex++] = 0;
        // maxRawSize
        buffer[bufferIndex++] = (byte) 0x00;
        buffer[bufferIndex++] = (byte) 0x10;
        buffer[bufferIndex++] = 0;
        buffer[bufferIndex++] = 0;
        // sessionKey
        buffer[bufferIndex++] = 1;
        buffer[bufferIndex++] = 2;
        buffer[bufferIndex++] = 3;