Set<Object> set = new HashSet<>();
    assertThat(union(emptySet(), emptySet()).copyInto(set)).isSameInstanceAs(set);
    assertThat(intersection(emptySet(), emptySet()).copyInto(set)).isSameInstanceAs(set);
    assertThat(difference(emptySet(), emptySet()).copyInto(set)).isSameInstanceAs(set);
    assertThat(symmetricDifference(emptySet(), emptySet()).copyInto(set)).isSameInstanceAs(set);
  }

  public void testCopyInto_emptySet() {

   * stable. There is usually no reason to retain a reference of type {@code SetView}; typically,
   * you either use it as a plain {@link Set}, or immediately invoke {@link #immutableCopy} or
   * {@link #copyInto} and forget the {@code SetView} itself.
   *
   * @since 2.0
   */
  public abstract static class SetView<E extends @Nullable Object> extends AbstractSet<E> {
    private SetView() {} // no subclasses but our own

   *
   * @param collection the collection to copy elements to
   * @return {@code collection}, for convenience
   * @since 14.0
   */
  @CanIgnoreReturnValue
  public final <C extends Collection<? super E>> C copyInto(C collection) {
    checkNotNull(collection);
    Iterable<E> iterable = getDelegate();
    if (iterable instanceof Collection) {
      collection.addAll((Collection<E>) iterable);
    } else {

   *
   * @param collection the collection to copy elements to
   * @return {@code collection}, for convenience
   * @since 14.0
   */
  @CanIgnoreReturnValue
  public final <C extends Collection<? super E>> C copyInto(C collection) {
    checkNotNull(collection);
    Iterable<E> iterable = getDelegate();
    if (iterable instanceof Collection) {
      collection.addAll((Collection<E>) iterable);
    } else {

   *       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

            // Given
            SmbResource destination = mock(SmbResource.class);

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

        @Test
        @DisplayName("rename operations should work correctly")
        void testRenameTo() throws CIFSException {

        SmbFile targetFile = new SmbFile(baseUrl + "shared/" + targetFileName, renameContext);

        // Copy content to new file
        srcForCopy.copyTo(targetFile);
        srcForCopy.close();
        targetFile.close();

        // Wait before delete
        Thread.sleep(500);
        System.gc();
        Thread.sleep(200);

     * servers.
     *
     * @param dest
     *            the destination file or directory
     * @throws CIFSException if an error occurs accessing the resource
     */
    void copyTo(SmbResource dest) throws CIFSException;

    /**
     * Changes the name of the file this <code>SmbResource</code> represents to the name
     * designated by the <code>SmbResource</code> argument.
     * <br>

                : new URL(context.url, name + ((attributes & ATTR_DIRECTORY) > 0 ? "/" : "")));

        /* why was this removed before? DFS? copyTo? Am I going around in circles? */
        auth = context.auth;

        if (context.share != null) {
            this.tree = context.tree;
            this.dfsReferral = context.dfsReferral;
        }