SMBUtil.writeInt4(messageLength, buffer, bufferIndex + 12);
        System.arraycopy(testData, 0, buffer, bufferIndex + 16, testData.length);

        // Decode
        int bytesDecoded = response.decode(buffer, bufferIndex, buffer.length);

        // Verify results
        assertEquals(namedPipeState, response.getNamedPipeState());
        assertEquals(readDataAvailable, response.getReadDataAvailable());

        @Override
        public void encode(NdrBuffer _dst) throws NdrException {
            _dst.align(4);
            _dst.enc_ndr_referent(sid, 1);

            if (sid != null) {
                _dst = _dst.deferred;
                sid.encode(_dst);

            }
        }

        @Override
        public void decode(NdrBuffer _src) throws NdrException {
            _src.align(4);

        SMBUtil.writeInt2(20, buffer, 42); // byteCount

        int length = testBlock.decode(buffer, 0);

        assertTrue(length > 0);
        assertEquals(4, testBlock.wordCount);
        assertNull(testBlock.getAndx());
    }

    @Test
    @DisplayName("Test decode with retain payload")
    void testDecodeWithRetainPayload() throws SMBProtocolDecodingException {

        void testPad8() {
            testMessage.encode(new byte[1024], 0);
            // After header is written, padding depends on position
            int headerStart = testMessage.getHeaderStart();
            assertEquals(0, headerStart); // Should start at 0
        }
    }

    @Nested
    @DisplayName("Encode/Decode Tests")
    class EncodeDecodeTests {

        @Test

        // When - Decode
        FileBasicInfo decodedInfo = new FileBasicInfo();
        int bytesDecoded = decodedInfo.decode(buffer, 0, bytesEncoded);

        // Then
        assertEquals(40, bytesEncoded);
        assertEquals(36, bytesDecoded); // decode returns 36, encode returns 40
        assertEquals(originalInfo.getCreateTime(), decodedInfo.getCreateTime());

 * hex.lowerCase(); // does nothing!
 * return hex.decode("deadbeef"); // throws an IllegalArgumentException
 * }
 *
 * <p>It is guaranteed that {@code encoding.decode(encoding.encode(x))} is always equal to {@code
 * x}, but the reverse does not necessarily hold.
 *
 * <table>
 * <caption>Encodings</caption>
 * <tr>
 * <th>Encoding
 * <th>Alphabet
 * <th>{@code char:byte} ratio
 * <th>Default padding
 * <th>Comments

            assertEquals(FileSystemInformation.FS_SIZE_INFO, fileFsSizeInfo.getFileSystemInformationClass());
        }
    }

    @Nested
    @DisplayName("Decode Method Tests")
    class DecodeMethodTests {

        @Test
        @DisplayName("Should decode buffer with typical values correctly")
        void shouldDecodeBufferWithTypicalValues() throws SMBProtocolDecodingException {

            assertEquals(FileSystemInformation.FS_FULL_SIZE_INFO, fileFsFullSizeInfo.getFileSystemInformationClass());
        }
    }

    @Nested
    @DisplayName("Decode Method Tests")
    class DecodeMethodTests {

        @Test
        @DisplayName("Should decode buffer with typical values correctly")
        void shouldDecodeBufferWithTypicalValues() throws SMBProtocolDecodingException {

/**
 * Interface for objects that can be decoded from a byte buffer.
 * This interface provides methods for deserializing data from SMB protocol messages.
 *
 * @author mbechler
 */
public interface Decodable {

    /**
     * Decode data from a byte buffer
     *
     * @param buffer the byte buffer containing the data to decode
     * @param bufferIndex the starting index in the buffer

    }

    @Test
    void testEncode() throws NdrException {
        // Test the encode method
        long testValue = 987654321098765L;
        NdrHyper ndrHyper = new NdrHyper(testValue);

        // Call the encode method with the mocked NdrBuffer
        ndrHyper.encode(mockNdrBuffer);

        // Verify that enc_ndr_hyper was called exactly once with the correct value