assertEquals(chunkCount, SMBUtil.readInt4(buffer, SOURCE_KEY_SIZE));

            // Verify some chunks
            int offset = HEADER_SIZE;
            assertEquals(0L, SMBUtil.readInt8(buffer, offset));
            assertEquals(0L, SMBUtil.readInt8(buffer, offset + 8));
            assertEquals(0, SMBUtil.readInt4(buffer, offset + 16));

            offset = HEADER_SIZE + ((chunkCount - 1) * CHUNK_SIZE);

        when(mockFile1.lastAccess()).thenReturn(System.currentTimeMillis() - 1800000);

        when(mockFile2.getName()).thenReturn("subfolder");
        when(mockFile2.length()).thenReturn(0L);
        when(mockFile2.lastModified()).thenReturn(System.currentTimeMillis() - 1800000);
        when(mockFile2.isDirectory()).thenReturn(true);
        when(mockFile2.getAttributes()).thenReturn(0x10); // FILE_ATTRIBUTE_DIRECTORY

    // close() should close underlying handle with 0L when valid
    @Test
    @DisplayName("close() closes underlying handle when valid")
    void close_validHandle_invokesClose() throws Exception {
        when(handle.isValid()).thenReturn(true);
        SmbWatchHandleImpl sut = new SmbWatchHandleImpl(handle, 0, false);

        sut.close();

        verify(handle, times(1)).close(0L);
    }

        assertNotNull(info);
        assertEquals(attributes, info.getAttributes());
        assertEquals(create, info.getCreateTime());
        assertEquals(lastWrite, info.getLastWriteTime());
        assertEquals(0L, info.getSize());
    }

    @Test
    void testTrans2QueryPathUnsupportedLevel() throws Exception {
        Trans2QueryPathInformationResponse trans = new Trans2QueryPathInformationResponse(9999) {
        };

      delegate.writeTo(bufferedSink);
      bufferedSink.flush();
    }

    public Sink sink(Sink sink) {
      return new ForwardingSink(sink) {
        private long totalBytesWritten = 0L;
        private boolean completed = false;

        @Override
        public void write(Buffer source, long byteCount) throws IOException {
          super.write(source, byteCount);

   * @since 15.0
   */
  public boolean isEmpty() throws IOException {
    Optional<Long> lengthIfKnown = lengthIfKnown();
    if (lengthIfKnown.isPresent()) {
      return lengthIfKnown.get() == 0L;
    }
    Closer closer = Closer.create();
    try {
      Reader reader = closer.register(openStream());
      return reader.read() == -1;
    } catch (Throwable e) {
      throw closer.rethrow(e);

   * @since 15.0
   */
  public boolean isEmpty() throws IOException {
    Optional<Long> lengthIfKnown = lengthIfKnown();
    if (lengthIfKnown.isPresent()) {
      return lengthIfKnown.get() == 0L;
    }
    Closer closer = Closer.create();
    try {
      Reader reader = closer.register(openStream());
      return reader.read() == -1;
    } catch (Throwable e) {
      throw closer.rethrow(e);

     * @return the timeout in 100-nanosecond intervals
     */
    public long getTimeoutFor100Ns() {
        if (timeoutMs == 0) {
            return 0L; // Persistent handles use 0
        }
        // Convert milliseconds to 100-nanosecond intervals
        // 1 ms = 10,000 * 100ns intervals
        long intervals = timeoutMs * 10000L;

    Random rng = new Random(0L);
    byte[] bytes = new byte[rng.nextInt(256) + 1];
    rng.nextBytes(bytes);
    assertEquals(hashFunction.hashBytes(bytes), hashFunction.hashBytes(ByteBuffer.wrap(bytes)));
  }

  static void assertHashByteBufferExhaustsBuffer(HashFunction hashFunction) {
    Random rng = new Random(0L);
    byte[] bytes = new byte[rng.nextInt(256) + 1];

  }

  private fun logWithTime(message: String) {
    val startNs = startNs
    val timeMs =
      if (startNs == null) {
        // Event occurred before start, for an example an early cancel.
        0L
      } else {
        TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startNs)
      }

    logger.invoke("[$timeMs ms] $message")
  }