byte[] buffer = new byte[512];

            int bytesWritten = req.writeBytesWireFormat(buffer, 0);

            assertEquals(48, SMBUtil.readInt2(buffer, 0)); // Structure size
            assertEquals(3, SMBUtil.readInt2(buffer, 2)); // Lock count
            assertArrayEquals(testFileId, Arrays.copyOfRange(buffer, 8, 24));

            // Each lock is 24 bytes

        @Test
        @DisplayName("Should not modify buffer during write")
        void testWriteDoesNotModifyBuffer() {
            byte[] buffer = new byte[64];
            Arrays.fill(buffer, (byte) 0xAA);
            byte[] originalBuffer = buffer.clone();

            notification.writeBytesWireFormat(buffer, 0);

            assertArrayEquals(originalBuffer, buffer);
        }
    }

    @Nested

        // For GCM, last 4 bytes should contain incrementing counter
        ByteBuffer buffer1 = ByteBuffer.wrap(nonce1, 12, 4).order(java.nio.ByteOrder.LITTLE_ENDIAN);
        ByteBuffer buffer2 = ByteBuffer.wrap(nonce2, 12, 4).order(java.nio.ByteOrder.LITTLE_ENDIAN);
        int counter1 = buffer1.getInt();
        int counter2 = buffer2.getInt();

        assertEquals(counter1 + 1, counter2, "Counter should increment between nonces");

                final int _bufferl = length / 2;
                final int _buffers = maximum_length / 2;
                _dst.enc_ndr_long(_buffers);
                _dst.enc_ndr_long(0);
                _dst.enc_ndr_long(_bufferl);
                final int _bufferi = _dst.index;
                _dst.advance(2 * _bufferl);

                _dst = _dst.derive(_bufferi);
                for (int _i = 0; _i < _bufferl; _i++) {

                        throw new NdrException(NdrException.INVALID_CONFORMANCE);
                    }
                    this.buffer = new short[_buffers];
                }
                _src = _src.derive(_bufferi);
                for (int _i = 0; _i < _bufferl; _i++) {
                    this.buffer[_i] = (short) _src.dec_ndr_short();
                }
            }
        }
    }

internal fun idnToAscii(host: String): String? {
  val bufferA = Buffer().writeUtf8(host)
  val bufferB = Buffer()

  // 1. Map, from bufferA to bufferB.
  while (!bufferA.exhausted()) {
    val codePoint = bufferA.readUtf8CodePoint()
    if (!IDNA_MAPPING_TABLE.map(codePoint, bufferB)) return null
  }

  // 2. Normalize, from bufferB to bufferA.
  val normalized = normalizeNfc(bufferB.readUtf8())
  bufferA.writeUtf8(normalized)

        assertThrows(Exception.class, () -> new Pac(pacData, keys));
    }

    @Test
    void testZeroBufferCount() throws IOException {
        // Test PAC with zero buffers (missing required buffers)
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        writeLittleEndianInt(baos, 0); // bufferCount = 0
        writeLittleEndianInt(baos, PacConstants.PAC_VERSION); // valid version

        );
        when(mockNdrBuffer.dec_ndr_small()).thenReturn(4, 5);
        when(mockDeferredNdrBuffer.dec_ndr_long()).thenReturn(5, 0, 5, // name buffer: buffers, 0, bufferl
                6, 0, 6, // dns_domain buffer: buffers, 0, bufferl
                7, 0, 7 // dns_forest buffer: buffers, 0, bufferl
        );
        when(mockDeferredNdrBuffer.dec_ndr_short()).thenReturn((int) (short) 'a', (int) (int) (short) 'b', (int) (int) (short) 'c',

     */
    public BufferCacheImpl(final Configuration cfg) {
        this(cfg.getBufferCacheSize(), cfg.getMaximumBufferSize());
    }

    /**
     * Constructs a buffer cache with specified parameters.
     *
     * @param maxBuffers the maximum number of buffers to cache
     * @param maxSize the size of each buffer in bytes
     *
     */
    public BufferCacheImpl(final int maxBuffers, final int maxSize) {

  private lateinit var server: MockWebServer
  private lateinit var client: OkHttpClient

  @BeforeEach
  fun setUp() {
    // Sockets on some platforms can have large buffers that mean writes do not block when
    // required. These socket factories explicitly set the buffer sizes on sockets created.
    server = MockWebServer()
    server.serverSocketFactory =
      object : DelegatingServerSocketFactory(getDefault()) {