return null;
        }).when(mockDcerpcHandle).sendrecv(any(MsrpcSamrOpenDomain.class));

        SamrDomainHandle handle = new SamrDomainHandle(mockDcerpcHandle, mockPolicyHandle, access, mockSid);

        IOException expectedException = new IOException("Network error during close");
        // Simulate IOException during close RPC call

    public void testConstructor() throws Exception {
        // Given
        String oldFileName = "oldFile.txt";
        String newFileName = "newFile.txt";

        // When
        smbComRename = new SmbComRename(config, oldFileName, newFileName);

        // Then
        assertEquals(ServerMessageBlock.SMB_COM_RENAME, smbComRename.getCommand());

        when(kerberosKey.getKeyType()).thenReturn(ENCRYPTION_TYPE);

        try (MockedStatic<KerberosEncData> mockedEncData = Mockito.mockStatic(KerberosEncData.class)) {
            mockedEncData.when(() -> KerberosEncData.decrypt(ENCRYPTED_DATA, kerberosKey, ENCRYPTION_TYPE)).thenReturn(decryptedData);

            // When

    @Test
    @DisplayName("Should calculate MD4 hash correctly")
    void testMD4Hash() {
        // Given
        String input = "Hello World";
        byte[] data = input.getBytes();

        // When
        MessageDigest md4 = Crypto.getMD4();
        byte[] hash = md4.digest(data);

        // Then
        assertNotNull(hash);
        assertEquals(16, hash.length); // MD4 produces 128-bit hash
    }

        verify(tree).send(request, RequestParam.NO_TIMEOUT, RequestParam.NO_RETRY);
    }

    @Test
    @DisplayName("send throws CIFSException for null request when implementation does")
    void send_nullRequest_throws() throws Exception {
        // Arrange
        when(tree.send(isNull())).thenThrow(new CIFSException("null request"));

        // Act
        CIFSException ex = assertThrows(CIFSException.class, () -> tree.send(null));

    /**
     * Test for close() method throwing CIFSException.
     * Verifies that the method correctly throws a CIFSException when configured to do so.
     * @throws CIFSException
     */
    @Test
    void testClose_throwsCIFSException() throws CIFSException {
        doThrow(new CIFSException("Test Exception")).when(smbTreeHandle).close();
        assertThrows(CIFSException.class, () -> smbTreeHandle.close(), "close() should throw CIFSException");

        void testConstructorZero() {
            // Given/When: Creating NdrShort with zero
            NdrShort ndrShort = new NdrShort(0);

            // Then: Value should be zero
            assertEquals(0, ndrShort.value);
        }

        @Test
        @DisplayName("Should handle maximum byte value correctly")
        void testConstructorMaxByte() {
            // Given/When: Creating NdrShort with max byte value

    void hasCapability_variousCaps(int cap) throws SmbException {
        when(transport.hasCapability(anyInt())).thenAnswer(inv -> ((int) inv.getArgument(0)) >= 0);

        boolean result = transport.hasCapability(cap);

        assertEquals(cap >= 0, result);
        verify(transport, times(1)).hasCapability(cap);
    }

    // Invalid input: simulate underlying SmbException when capability check fails
    @Test

        when(sh.isSMB2()).thenReturn(true);
        when(dh.isSMB2()).thenReturn(true);
        when(sh.isSameTree(dh)).thenReturn(true);

        // Source open returns a handle that reports size 0
        SmbFileHandleImpl sfd = mock(SmbFileHandleImpl.class);
        when(sfd.getInitialSize()).thenReturn(0L);

    }

    private TestDcerpcHandle handle;

    @BeforeEach
    void setUp() {
        // Setup buffer cache mocks with lenient stubbing
        lenient().when(mockContext.getBufferCache()).thenReturn(mockBufferCache);
        lenient().when(mockBufferCache.getBuffer()).thenReturn(new byte[8192]);
        handle = new TestDcerpcHandle(mockContext, mockBinding);
    }

    @Nested