// Then
        assertEquals(4, bytesWritten);

        // Verify structure size (4) is written at offset
        assertEquals(4, SMBUtil.readInt2(buffer, offset));

        // Verify reserved field (0) is written at offset + 2
        assertEquals(0, SMBUtil.readInt2(buffer, offset + 2));
    }

    @Test
    @DisplayName("Should write exact wire format structure")

        dstIndex += 2;

        SMBUtil.writeInt2(4, dst, dstIndex); // NameLength
        dstIndex += 2;

        SMBUtil.writeInt2(0, dst, dstIndex); // Reserved
        dstIndex += 2;

        SMBUtil.writeInt2(24, dst, dstIndex); // DataOffset (from start of context)
        dstIndex += 2;

        SMBUtil.writeInt4(32, dst, dstIndex); // DataLength

        buf.enc_ndr_long(0); /* assoc. group */
        buf.enc_ndr_small(1); /* num context items */
        buf.enc_ndr_small(0); /* reserved */
        buf.enc_ndr_short(0); /* reserved2 */
        buf.enc_ndr_short(0); /* context id */
        buf.enc_ndr_small(1); /* number of items */
        buf.enc_ndr_small(0); /* reserved */
        this.binding.getUuid().encode(buf);
        buf.enc_ndr_short(this.binding.getMajor());

        buf.enc_ndr_long(0); /* assoc. group */
        buf.enc_ndr_small(1); /* num context items */
        buf.enc_ndr_small(0); /* reserved */
        buf.enc_ndr_short(0); /* reserved2 */
        buf.enc_ndr_short(0); /* context id */
        buf.enc_ndr_small(1); /* number of items */
        buf.enc_ndr_small(0); /* reserved */
        binding.uuid.encode(buf);
        buf.enc_ndr_short(binding.major);
        buf.enc_ndr_short(binding.minor);

framework assíncrono que não funciona como descrito acima e você está acostumado a definir *funções de operação de rota* triviais somente de computação com simples `def` para ter um mínimo ganho de performance (cerca de 100 nanosegundos), por favor observe que no **FastAPI** o efeito pode ser bem o oposto. Nesses casos, é melhor usar `async def` a menos que suas *funções de operação de rota* utilizem código que performe bloqueamento <abbr title="Input/Output: disco lendo ou escrevendo, comunicações...

        // Write context header
        writeInt4(buffer, offset, getName().length());  // NameOffset
        writeInt4(buffer, offset + 4, getName().length());  // NameLength
        writeInt4(buffer, offset + 8, 16);  // Reserved
        
        int dataOffset = offset + 16 + getName().length();
        dataOffset = (dataOffset + 7) & ~7;  // 8-byte alignment
        
        writeInt4(buffer, offset + 12, dataOffset - offset);  // DataOffset

        dstIndex += 2;

        SMBUtil.writeInt2(4, dst, dstIndex); // NameLength
        dstIndex += 2;

        SMBUtil.writeInt2(0, dst, dstIndex); // Reserved
        dstIndex += 2;

        SMBUtil.writeInt2(24, dst, dstIndex); // DataOffset (from start of context)
        dstIndex += 2;

        SMBUtil.writeInt4(STRUCTURE_SIZE, dst, dstIndex); // DataLength

        dstIndex += 8;
        SMBUtil.writeInt8(this.length, dst, dstIndex);
        dstIndex += 8;

        SMBUtil.writeInt4(this.flags, dst, dstIndex);
        dstIndex += 4;
        dstIndex += 4; // Reserved
        return dstIndex - start;
    }

    public static final String NAME = "DHnQ";  // Durable Handle Request
    
    private static final int STRUCTURE_SIZE = 16;
    private long reserved;  // Must be zero
    
    public DurableHandleRequest() {
        super(NAME);
        this.reserved = 0;
    }
    
    @Override
    public void encode(byte[] buffer, int offset) {
        // Context header
        int nameLen = getName().length();

     * @return the standard lease context size
     */
    protected int getStandardLeaseSize() {
        // Standard lease V2 size: LeaseKey(16) + LeaseState(4) + Flags(4) + reserved fields
        return 32;
    }

    @Override
    public int size() {
        // Context header: 16 bytes
        // Name: 4 bytes ("DLse")
        // Padding: 4 bytes (to align data to 8-byte boundary)