*       one with {@link CharSequence#charAt(int)}.
   *   <li>use {@link Appendable#append(CharSequence)} in {@link #copyTo(Appendable)} and {@link
   *       #copyTo(CharSink)}. We know this is correct since strings are immutable and so the length
   *       can't change, and it is faster because many writers and appendables are optimized for

   *       one with {@link CharSequence#charAt(int)}.
   *   <li>use {@link Appendable#append(CharSequence)} in {@link #copyTo(Appendable)} and {@link
   *       #copyTo(CharSink)}. We know this is correct since strings are immutable and so the length
   *       can't change, and it is faster because many writers and appendables are optimized for

     *
     * In this case the current thread is assigned as the upstream reader. We read bytes from
     * upstream and copy them to both the file and to the buffer. Finally we release the upstream
     * reader lock and return the new bytes.
     *
     * ## The file
     *
     * In this case we copy bytes from the file to the [sink].
     *
     * ## The buffer
     *

        @Test
        @DisplayName("copy operation should work correctly")
        void testCopyTo() throws CIFSException {
            // Given
            SmbResource destination = mock(SmbResource.class);

            // When/Then
            assertDoesNotThrow(() -> mockResource.copyTo(destination), "Copy operation should not throw exception");
            verify(mockResource).copyTo(destination);
        }

        @Test

        assertFalse(targetFile.exists(), "Target file should not exist initially");

        // Copy file
        sourceFile.copyTo(targetFile);

        assertTrue(sourceFile.exists(), "Source file should still exist after copy");
        assertTrue(targetFile.exists(), "Target file should exist after copy");

        // Verify content in both files
        try (InputStream in = sourceFile.getInputStream()) {

    /**
     * This method will copy the file or directory represented by this
     * <code>SmbResource</code> and it's sub-contents to the location specified by the
     * <code>dest</code> parameter. This file and the destination file do not
     * need to be on the same host. This operation does not copy extended
     * file attributes such as ACLs but it does copy regular attributes as

     * @throws SmbException if an error occurs during the copy operation
     */
    public void copyTo(final SmbFile dest) throws SmbException {
        SmbComReadAndX req;
        SmbComReadAndXResponse resp;
        WriterThread w;
        int bsize;
        byte[][] b;

        /* Should be able to copy an entire share actually
         */

            }

            dest.clearAttributeCache();
        } catch (SmbException e) {
            throw new CIFSException("Failed to copy resource: " + e.getMessage(), e);
        } catch (Exception e) {
            throw new CIFSException("Unexpected error during recursive copy", e);
        }
    }

    /**
     *
     */
    void clearAttributeCache() {
        this.attrExpiration = 0;

                        final Smb2IoctlRequest copy = new Smb2IoctlRequest(sh.getConfig(),
                                write ? Smb2IoctlRequest.FSCTL_SRV_COPYCHUNK_WRITE : Smb2IoctlRequest.FSCTL_SRV_COPYCHUNK, dfd.getFileId());
                        copy.setFlags(Smb2IoctlRequest.SMB2_O_IOCTL_IS_FSCTL);
                        copy.setInputData(new SrvCopychunkCopy(resumeKey, chunkInfo));

    Collections.addAll(all, others);
    return copyOf(all.iterator());
  }

  /** ImmutableSet.of API that is friendly to use from JavaScript. */
  @JsMethod(name = "of")
  static <E> ImmutableSet<E> jsOf(E... elements) {
    return copyOf(elements);
  }

  @JsMethod
  public static <E> ImmutableSet<E> copyOf(E[] elements) {
    checkNotNull(elements);
    switch (elements.length) {