int byteCountValue = 16 + 10; // guid + token
        setByteCount(response, byteCountValue);
        byte[] buffer = new byte[byteCountValue];
        byte[] guid = new byte[16];
        for (int i = 0; i < 16; i++) {
            guid[i] = (byte) i;
        }
        System.arraycopy(guid, 0, buffer, 0, 16);
        byte[] token = new byte[10];

        request.encode(buffer, 0);

        // Verify zero GUID
        byte[] extractedGuid = new byte[16];
        System.arraycopy(buffer, 4, extractedGuid, 0, 16);
        assertArrayEquals(zeroGuid, extractedGuid);
    }

    @Test
    @DisplayName("Test encode with all 0xFF GUID")
    void testEncodeWithMaxGuid() {
        byte[] maxGuid = new byte[16];

        }
    }

    /**
     * Get handle information by GUID
     * @param guid the handle GUID
     * @return the handle info or null if not found
     */
    public HandleInfo getHandleByGuid(HandleGuid guid) {
        lock.readLock().lock();
        try {
            return guidToHandle.get(guid);
        } finally {
            lock.readLock().unlock();
        }
    }

        assertNull(serverData.encryptionKey);

        // Test guid (typically 16 bytes)
        byte[] guid = new byte[16];
        Arrays.fill(guid, (byte) 0xAB);
        serverData.guid = guid;
        assertNotNull(serverData.guid);
        assertArrayEquals(guid, serverData.guid);
        assertEquals(16, serverData.guid.length);
    }

    /**

        assertNotNull(response.getServerGuid(), "Server GUID should not be null");
        assertEquals(16, response.getServerGuid().length, "Server GUID should be 16 bytes");
        assertArrayEquals(new byte[16], response.getServerGuid(), "Initial server GUID should be all zeros");
        assertEquals(0, response.getSecurityMode(), "Initial security mode should be 0");

    }

    /**
     * Get the durable handle GUID from the response
     * @return the durable handle GUID or null if no durable handle was granted
     */
    public jcifs.internal.smb2.persistent.HandleGuid getDurableHandleGuid() {
        // For now, return null as the GUID is typically provided in the request context
        // and the response doesn't necessarily contain the GUID in a standard format
        return null;
    }

        int caps = SMBUtil.readInt4(buffer, 8);
        assertTrue((caps & Smb2Constants.SMB2_GLOBAL_CAP_DFS) != 0);

        // Verify client GUID
        byte[] guid = new byte[16];
        System.arraycopy(buffer, 12, guid, 0, 16);
        assertArrayEquals(testMachineId, guid);

        // Verify dialects
        assertEquals(0x0210, SMBUtil.readInt2(buffer, 36));
        assertEquals(0x0300, SMBUtil.readInt2(buffer, 38));

        }
        ByteBuffer bb = ByteBuffer.wrap(bytes);
        long mostSig = bb.getLong();
        long leastSig = bb.getLong();
        this.guid = new UUID(mostSig, leastSig);
    }
    
    public byte[] toBytes() {
        ByteBuffer bb = ByteBuffer.allocate(16);
        bb.putLong(guid.getMostSignificantBits());
        bb.putLong(guid.getLeastSignificantBits());

    }

    @Test
    @DisplayName("Should return server GUID")
    void testGetServerGuid() throws Exception {
        // Given
        byte[] guid = new byte[16];
        for (int i = 0; i < 16; i++) {
            guid[i] = (byte) i;
        }
        setPrivateField(response, "serverGuid", guid);

        // When
        byte[] result = response.getServerGuid();

        // Then

            } else {
                this.server.oemDomainName = new String();
            }
        } else {
            this.server.guid = new byte[16];
            System.arraycopy(buffer, bufferIndex, this.server.guid, 0, 16);
            bufferIndex += this.server.guid.length;
            this.server.oemDomainName = new String();

            if (this.byteCount > 16) {
                // have initial spnego token