@DisplayName("Constructor should initialize with correct values")
    void testConstructor() {
        // Act
        transPeekNamedPipe = new TransPeekNamedPipe(mockConfig, TEST_PIPE_NAME, TEST_FID);

        // Assert
        assertNotNull(transPeekNamedPipe);
        assertEquals(TEST_PIPE_NAME, transPeekNamedPipe.name);
        assertEquals(0xFFFFFFFF, transPeekNamedPipe.timeout);

        testSids = new jcifs.SID[] { mockSid };

        // Act & Assert - Constructor accepts null, no exception thrown
        assertDoesNotThrow(() -> {
            new MsrpcLookupSids(null, testSids);
        });
    }

    @Test
    void constructor_shouldThrowExceptionWithNullSids() {
        // Act & Assert - Null SID array causes NPE when accessing length

        // Assert - message and cause are null
        assertNull(ex.getMessage(), "Default constructor should have null message");
        assertNull(ex.getCause(), "Default constructor should have null cause");

        // Assert - toString shows class name when message is null
        assertEquals(SMBProtocolDowngradeException.class.getName(), ex.toString());

        byte[] buffer = new byte[100];
        int off = 10;
        int len = 40;

        // Act
        SmbComWrite write = new SmbComWrite(fid, offset, remaining, buffer, off, len);

        // Assert
        assertEquals(fid, getFieldValue(write, "fid"), "FID should match constructor arg");
        assertEquals(offset, getFieldValue(write, "offset"), "Offset should match constructor arg");

    void testConstructor() {
        // Act
        TransTransactNamedPipe trans = new TransTransactNamedPipe(mockConfig, TEST_FID, TEST_DATA, TEST_OFFSET, TEST_LENGTH);

        // Assert
        assertNotNull(trans);
        assertEquals(0, trans.maxParameterCount);
        assertEquals(0xFFFF, trans.maxDataCount);
        assertEquals(0x00, trans.maxSetupCount);
        assertEquals(2, trans.setupCount);

        // Assert crawling info and status update were called
        assertTrue(deleteCrawlingInfoCalled[0]);
        assertTrue(updateJobLogStatusCalled[0]);

        // Assert other services were not called
        assertFalse(deleteSearchLogCalled[0]);
        assertFalse(deleteJobLogCalled[0]);
        assertFalse(deleteUserInfoCalled[0]);

        // Assert result contains skip messages

        int base = Smb2Constants.SMB2_HEADER_LENGTH + 4; // structure size
        int expected = ((base + 7) / 8) * 8; // expected 8-byte alignment

        // Act
        int actual = req.size();

        // Assert
        assertEquals(expected, actual, "size() must be 8-byte aligned");
    }

    @ParameterizedTest
    @ValueSource(ints = { 0, 1, 5 })

            // Assert: message is meaningful
            assertEquals("Structure size is not 4", ex.getMessage());
        }

        @Test
        @DisplayName("Null buffer leads to NullPointerException from readInt2")
        void nullBuffer_throwsNPE() {
            // Arrange
            Smb2LogoffResponse resp = newResponse();

            // Act & Assert

        void constructsWithIpcShare(String url) throws Exception {
            // Arrange & Act
            SmbNamedPipe pipe = new SmbNamedPipe(url, SmbPipeResource.PIPE_TYPE_RDWR, ctx());

            // Assert: type is named pipe and pipe type preserved
            assertEquals(SmbConstants.TYPE_NAMED_PIPE, pipe.getType(), "Type should be TYPE_NAMED_PIPE");

    }

    @Test
    @DisplayName("getDefaultPort returns SMB default port")
    void testGetDefaultPort() {
        // Arrange
        Handler handler = newHandler();
        // Act & Assert
        assertEquals(SmbConstants.DEFAULT_PORT, handler.getDefaultPort(), "Default port should match SmbConstants");
    }

    @Test
    @DisplayName("openConnection returns SmbFile using provided CIFSContext")