}

    @Test
    @DisplayName("ensureTreeConnected delegates and returns the tree handle")
    void ensureTreeConnected_delegatesAndReturns() throws Exception {
        // Arrange
        SmbPipeOutputStream out = newStream();
        when(handle.ensureTreeConnected()).thenReturn(tree);

        // Act
        SmbTreeHandleImpl result = out.ensureTreeConnected();

        // Assert

     */
    @Override
    public boolean isOpen() {
        return this.handle.isOpen();
    }

    @Override
    protected synchronized SmbTreeHandleImpl ensureTreeConnected() throws CIFSException {
        return this.handle.ensureTreeConnected();
    }

    @Override
    protected synchronized SmbFileHandleImpl ensureOpen() throws CIFSException {
        return this.handle.ensureOpen();
    }

    /**

     *
     * @return the tree handle implementation
     * @throws CIFSException if a connection error occurs
     */
    protected synchronized SmbTreeHandleImpl ensureTreeConnected() throws CIFSException {
        return this.handle.ensureTreeConnected();
    }

    @Override
    protected synchronized SmbFileHandleImpl ensureOpen() throws CIFSException {
        return this.handle.ensureOpen();
    }

    /**

     * Ensures that the tree connection is established and returns it.
     *
     * @return tree connection
     * @throws CIFSException if an error occurs connecting to the tree
     */
    SmbTreeHandleInternal ensureTreeConnected() throws CIFSException;

    /**
     * Ensures that the file handle is open and returns it.
     *
     * @return file handle
     * @throws CIFSException if an error occurs opening the file
     */

        if (!smbFile.isDirectory()) {
            throw new SmbException("Not a directory: " + smbFile.getPath());
        }

        try (SmbTreeHandleImpl th = smbFile.ensureTreeConnected()) {
            // Check if we can use directory leasing
            DirectoryLeaseManager dirManager = getDirectoryLeaseManager(th);