}

    /**
     * Test getMessageByDcerpcError() with an error code smaller than any known.
     */
    @Test
    void testGetMessageByDcerpcError_smallerThanAny() {
        int unknownCode = -1;
        String message = DcerpcException.getMessageByDcerpcError(unknownCode);
        assertEquals("0xFFFFFFFF", message, "Should return hex string for code smaller than any known.");
    }

    /**

     */
    double estimateCompressionRatio(byte[] data, int algorithm);

    /**
     * Gets the minimum data size threshold for compression.
     * Data smaller than this threshold should not be compressed.
     *
     * @return minimum size in bytes for compression to be beneficial
     */
    int getMinCompressionSize();

    /**

        // Any PACDecodingException is acceptable for this test
        assertNotNull(e.getMessage());
    }

    @Test
    void testTooSmallPac() {
        // Test that PAC smaller than 8 bytes is rejected
        byte[] smallData = new byte[4];

        PACDecodingException e = assertThrows(PACDecodingException.class, () -> new Pac(smallData, keys));

    void testSizeCalculationWithDifferentBufferSizes() {
        // Test with smaller maximum buffer size
        when(mockConfig.getMaximumBufferSize()).thenReturn(8192);
        when(mockConfig.getListSize()).thenReturn(16384);

        request = new Smb2QueryDirectoryRequest(mockConfig);
        assertNotNull(request);

        // Test with smaller list size
        when(mockConfig.getMaximumBufferSize()).thenReturn(16384);

    }

    /**
     * Get the minimum of two dialect versions
     *
     * @param a the first version to compare
     * @param b the second version to compare
     * @return smaller of the two versions
     */
    public static DialectVersion min(final DialectVersion a, final DialectVersion b) {
        if (a.atMost(b)) {
            return a;
        }
        return b;
    }

    }

    @Test
    @DisplayName("Test small data handling")
    public void testSmallDataHandling() throws CIFSException {
        byte[] smallData = new byte[100]; // Below minimum compression size

        byte[] compressed = compressionService.compress(smallData, CompressionService.COMPRESSION_LZ77);
        // Should return uncompressed data for small inputs
        assertArrayEquals(smallData, compressed);
    }

     *
     * @throws Exception
     */
    @Test
    public void testReadBytes_CustomMaxSize_WithinLimit() throws Exception {
        final File file = tempFolder.newFile("small.txt");
        final String content = "Small content";
        final FileOutputStream out = new FileOutputStream(file);
        try {
            out.write(content.getBytes("UTF-8"));
        } finally {
            out.close();

        ValidateNegotiateInfoRequest request =
                new ValidateNegotiateInfoRequest(DEFAULT_CAPABILITIES, defaultClientGuid, DEFAULT_SECURITY_MODE, defaultDialects);

        // Create buffer smaller than required size
        byte[] smallBuffer = new byte[request.size() - 1];

        assertThrows(ArrayIndexOutOfBoundsException.class, () -> {
            request.encode(smallBuffer, 0);
        });
    }

        // Test integer conversion
        char[] dst1 = new char[8];
        Hexdump.toHexChars(0x1234ABCD, dst1, 0, 8);
        assertEquals("1234ABCD", new String(dst1));

        // Test with smaller size
        char[] dst2 = new char[4];
        Hexdump.toHexChars(0xABCD, dst2, 0, 4);
        assertEquals("ABCD", new String(dst2));

        // Test with offset
        char[] dst3 = new char[10];

        byte[] tooSmallBuffer = new byte[32]; // Much smaller than required 65 bytes

        SMBProtocolDecodingException exception = assertThrows(SMBProtocolDecodingException.class, () -> {
            response.readBytesWireFormat(tooSmallBuffer, 0);
        });

        assertTrue(exception.getMessage().contains("Buffer too small for SMB2 negotiate response"));