buf.writeOctetArray(contextHandle, 0, Math.min(contextHandle.length, 20));
            // Pad with zeros if context handle is shorter than 20 bytes
            for (int i = contextHandle.length; i < 20; i++) {
                buf.enc_ndr_small(0);
            }
        } else {
            // Write 20 zero bytes for null context handle
            for (int i = 0; i < 20; i++) {
                buf.enc_ndr_small(0);

    }

    @Override
    protected int writeDataWireFormat(final byte[] dst, int dstIndex) {
        final int start = dstIndex;
        dstIndex += this.info.encode(dst, dstIndex);

        /* 6 zeros observed with NT */
        SMBUtil.writeInt8(0L, dst, dstIndex);
        dstIndex += 6;

        /*
         * Also observed 4 byte alignment but we stick
         * with the default for jCIFS which is 2

        writeInt8(0L, dst, dstIndex);
        dstIndex += 8;
        /* Samba 2.2.7 needs ATTR_NORMAL
         */
        writeInt2(0x80 | attributes, dst, dstIndex);
        dstIndex += 2;
        /* 6 zeros observed with NT */
        writeInt8(0L, dst, dstIndex);
        dstIndex += 6;

        /* Also observed 4 byte alignment but we stick
         * with the default for jCIFS which is 2 */

    }

    @Test
    @DisplayName("Should write zeros for reserved field")
    void testReservedFieldIsZero() {
        // Given
        Configuration mockConfig = mock(Configuration.class);
        Smb2TreeDisconnectRequest request = new Smb2TreeDisconnectRequest(mockConfig);
        byte[] buffer = new byte[256];
        // Fill with non-zero values first
        for (int i = 0; i < buffer.length; i++) {

        message[61] = 0x00;
        message[62] = 0x00;
        message[63] = 0x00;

        // Add dummy LM response (24 zeros at offset 64)
        for (int i = 0; i < 24; i++) {
            message[64 + i] = 0;
        }

        // Add dummy NT response (24 zeros at offset 88)
        for (int i = 0; i < 24; i++) {
            message[88 + i] = 0;
        }

        SMBUtil.writeInt2(0x0302, buffer, 4);

        // Negotiate context count (0 for non-3.1.1)
        SMBUtil.writeInt2(0, buffer, 6);

        // Server GUID (16 bytes of zeros)
        // Already initialized to zeros

        // Capabilities
        SMBUtil.writeInt4(Smb2Constants.SMB2_GLOBAL_CAP_DFS, buffer, 24);

        // Max sizes (reasonable values)

            assertEquals(originalMessage.getFlags(), parsedMessage.getFlags());
            assertNull(parsedMessage.getChallenge()); // Should be null if all zeros
            assertNull(parsedMessage.getTarget());
            assertNull(parsedMessage.getContext()); // Should be null if all zeros
            assertNull(parsedMessage.getTargetInformation());
        }

        @Test

    assertThat(Adapters.INTEGER_AS_LONG.fromDer(bytes)).isEqualTo(-549755813887L)
    assertThat(Adapters.INTEGER_AS_LONG.toDer(-549755813887L)).isEqualTo(bytes)
  }

  @Test fun `eight zeros`() {
    val bytes = "020200ff".decodeHex()
    assertThat(Adapters.INTEGER_AS_LONG.fromDer(bytes)).isEqualTo(255)
    assertThat(Adapters.INTEGER_AS_LONG.toDer(255)).isEqualTo(bytes)
  }

    }

    @Test
    @DisplayName("Should handle null file ID gracefully")
    void testNullFileId() {
        // Given
        byte[] nullFileId = new byte[16]; // All zeros
        Configuration config = mock(Configuration.class);
        when(config.getNotifyBufferSize()).thenReturn(8192);

        // When

        response = new Trans2QueryFSInformationResponse(config, FileSystemInformation.SMB_INFO_ALLOCATION);

        byte[] buffer = new byte[100];
        // Initialize buffer with zeros to avoid random data
        java.util.Arrays.fill(buffer, (byte) 0);

        // Set dataCount to 0 - but decode still runs
        setDataCount(response, 0);