for (int i = 0; i < dst.length; i++) {
            dst[i] = (byte) (i & 0xFF);
        }

        int startIndex = 5;
        int bytesWritten = notifyChange.writeSetupWireFormat(dst, startIndex);

        // Check that bytes before startIndex are unchanged
        for (int i = 0; i < startIndex; i++) {
            assertEquals((byte) (i & 0xFF), dst[i]);
        }

            e.name = readString(buffer, bufferIndex, 16, false);
            bufferIndex += 16;
            e.versionMajor = buffer[bufferIndex] & 0xFF;
            bufferIndex++;
            e.versionMinor = buffer[bufferIndex++] & 0xFF;
            e.type = readInt4(buffer, bufferIndex);
            bufferIndex += 4;
            int off = readInt4(buffer, bufferIndex);
            bufferIndex += 4;

            baos.write(content.length);
        } else {
            baos.write(0x82); // length of length = 2
            baos.write((content.length >> 8) & 0xFF);
            baos.write(content.length & 0xFF);
        }

        baos.write(content);
        return baos.toByteArray();
    }

                buffer[i] = (byte) 0xFF;
            }

            int startIndex = 50;
            echoRequest.writeBytesWireFormat(buffer, startIndex);

            // Check bytes before written area are unchanged
            for (int i = 0; i < startIndex; i++) {
                assertEquals((byte) 0xFF, buffer[i]);
            }

        serverData.encryptionKey = originalKey;

        // When - modify the original array
        originalKey[0] = (byte) 0xFF;

        // Then - the field should also be modified (same reference)
        assertEquals((byte) 0xFF, serverData.encryptionKey[0]);
        assertSame(originalKey, serverData.encryptionKey);
    }

    /**
     * Test multiple ServerData instances are independent

    }

    @Test
    @DisplayName("setFileId should update file ID")
    void testSetFileId() throws Exception {
        byte[] newFileId = new byte[16];
        Arrays.fill(newFileId, (byte) 0xFF);

        request.setFileId(newFileId);

        Field fileIdField = Smb2FlushRequest.class.getDeclaredField("fileId");
        fileIdField.setAccessible(true);

    byte[] quad = textToNumericFormatV4(dottedQuad);
    if (quad == null) {
      return null;
    }
    String penultimate = Integer.toHexString(((quad[0] & 0xff) << 8) | (quad[1] & 0xff));
    String ultimate = Integer.toHexString(((quad[2] & 0xff) << 8) | (quad[3] & 0xff));
    return initialPart + penultimate + ":" + ultimate;
  }

  private static byte parseOctet(String ipString, int start, int end) {

            uuid.clock_seq_hi_and_reserved = (byte) 0x11;
            uuid.clock_seq_low = (byte) 0x22;
            uuid.node = new byte[] { (byte) 0xAA, (byte) 0xBB, (byte) 0xCC, (byte) 0xDD, (byte) 0xEE, (byte) 0xFF };

            // Mock the derive method to return a buffer for node encoding
            when(mockNdrBuffer.derive(anyInt())).thenReturn(mockNdrBuffer);

            // When: Encoding the UUID

            final byte[] addr = localInetAddress.getAddress();
            localHostname =
                    "JCIFS" + (addr[2] & 0xFF) + "_" + (addr[3] & 0xFF) + "_" + Hexdump.toHexString((int) (Math.random() * 0xFF), 2);
        }

        /*
         * Create an NbtAddress for the local interface with
         * the name deduced above possibly with scope applied and

    }

    @Test
    @DisplayName("Should handle edge case with all 0xFF session key")
    void testDeriveKeys_AllFFSessionKey() {
        // Given
        byte[] ffSessionKey = new byte[16];
        Arrays.fill(ffSessionKey, (byte) 0xFF);
        int dialect = Smb2Constants.SMB2_DIALECT_0311;

        // When