byte[] data = new byte[] { 1, 2, 3 };
        byte[] mic = new byte[] { 9, 8 };
        when(gssContext.getMIC(eq(data), eq(0), eq(3), any())).thenReturn(mic);

        byte[] res = ctx.calculateMIC(data);
        assertArrayEquals(mic, res);
        verify(gssContext, times(1)).getMIC(eq(data), eq(0), eq(3), any());
    }

    @Test
    @DisplayName("calculateMIC wraps GSSException into CIFSException")

        // Then
        // MIC (Message Integrity Check) should be included for newer versions
        if (type3.isMICRequired()) {
            assertNotNull(type3.getMic());
            assertEquals(16, type3.getMic().length); // MIC is 16 bytes
        }
    }

    @Test
    @DisplayName("Should handle case sensitivity correctly")
    void testCaseSensitivity() throws Exception {
        // Given

     * @return A <code>byte[]</code> containing the message integrity code.
     */
    public byte[] getMic() {
        return this.mic;
    }

    /**
     * Sets the message integrity code (MIC) for this Type-3 message.
     *
     * @param mic
     *            NTLM mic to set (16 bytes)
     */
    public void setMic(final byte[] mic) {
        this.mic = mic;
    }

    /**

     *
     * @see jcifs.smb.SSPContext#calculateMIC(byte[])
     */
    @Override
    public byte[] calculateMIC(byte[] data) throws CIFSException {
        try {
            return this.gssContext.getMIC(data, 0, data.length, new MessageProp(false));
        } catch (GSSException e) {
            throw new CIFSException("Failed to calculate MIC", e);
        }
    }

    /**
     * {@inheritDoc}
     *

            assertEquals(0x3456, testBlock.getFlags2());
            assertEquals(0x1234, testBlock.getTid());
            assertEquals(0x5678, testBlock.getPid());
            assertEquals(0x9ABC, testBlock.getUid());
            assertEquals(0xDEF0, testBlock.getMid());
        }

        @Test
        @DisplayName("Test decode with signature verification failure")

    class ConstructorTests {

        private Configuration mockConfig;

        @BeforeEach
        void setUp() {
            mockConfig = mock(Configuration.class);
            when(mockConfig.getPid()).thenReturn(12345);
        }

        @Test
        @DisplayName("Should initialize with correct command and MID")
        void testConstructorInitialization() throws Exception {
            // Given

            this.andx.setFlags(getFlags());
            this.andx.setFlags2(getFlags2());
            this.andx.setTid(getTid());
            this.andx.setPid(getPid());
            this.andx.setUid(getUid());
            this.andx.setMid(getMid());
            this.andx.setUseUnicode(this.isUseUnicode());

            if (this.andx instanceof AndXServerMessageBlock) {

        // Mock config methods needed for SMB1
        when(config.getPid()).thenReturn(1234);

        SmbComTreeConnectAndXResponse response = mock(SmbComTreeConnectAndXResponse.class);
        when(response.getService()).thenReturn("A:");
        when(response.isValidTid()).thenReturn(true);
        when(response.getTid()).thenReturn(1);
        when(session.send(any(), any())).thenReturn(response);

     */
    public final int getTid() {
        return this.tid;
    }

    /**
     * @param tid
     *            the tid to set
     */
    @Override
    public final void setTid(final int tid) {
        this.tid = tid;
    }

    /**
     * Gets the process identifier
     * @return the pid
     */
    public final int getPid() {
        return this.pid;
    }

            KerberosPacAuthData authData = new KerberosPacAuthData(pacData, keys);
            assertNotNull(authData.getPac());
            assertNotNull(authData.getPac().getLogonInfo());
            assertNotNull(authData.getPac().getServerSignature());
            assertNotNull(authData.getPac().getKdcSignature());
        }
    }

    // Test exception for empty PAC
    @Test
    void testConstructorEmptyPac() {