@BeforeEach
    void setUp() {
        MockitoAnnotations.openMocks(this);
        when(mockConfig.getPid()).thenReturn(12345);
    }

    @Nested
    @DisplayName("Constructor Tests")
    class ConstructorTests {

        @Test
        @DisplayName("Test constructor with config only")
        void testConstructorWithConfig() {
            testBlock = new TestServerMessageBlock(mockConfig);

        }

        testFileName = "test-file.txt";
        response = new Smb2CloseResponse(mockConfig, testFileId, testFileName);
    }

    @Nested
    @DisplayName("Constructor Tests")
    class ConstructorTests {

        @Test
        @DisplayName("Constructor should initialize with config, fileId and fileName")
        void testConstructorWithAllParameters() {
            // When

    private byte[] buffer;

    @BeforeEach
    void setUp() {
        buffer = new byte[BUFFER_SIZE];
    }

    @Nested
    @DisplayName("Constructor Tests")
    class ConstructorTests {

        @Test
        @DisplayName("Should create instance with Configuration, hash algorithms and salt")
        void testConstructorWithConfigHashAlgosAndSalt() {

    @BeforeEach
    void setUp() {
        MockitoAnnotations.openMocks(this);
        testMessage = new TestServerMessageBlock2(mockConfig);
    }

    @Nested
    @DisplayName("Constructor Tests")
    class ConstructorTests {

        @Test
        @DisplayName("Should create with configuration only")
        void testConstructorWithConfig() {
            ServerMessageBlock2 msg = new TestServerMessageBlock2(mockConfig);

        when(mockConfig.isUseUnicode()).thenReturn(true);

        return mockContext;
    }

    @Nested
    @DisplayName("Constructor Tests")
    class ConstructorTests {

        @Test
        @DisplayName("Constructor with CIFSContext should create message with default flags")
        void testConstructor_CIFSContext() {
            // Given

        preauthIntegrityHash = new byte[64];
        Arrays.fill(preauthIntegrityHash, (byte) 0xBB);
    }

    @Nested
    @DisplayName("Constructor Tests")
    class ConstructorTests {

        @Test
        @DisplayName("Should create digest for SMB 2.0.2 with HmacSHA256")
        void testConstructorSmb202() throws GeneralSecurityException {