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() {

        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 {

        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

    @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);