*/
    @Override
    void close() throws CIFSException;

    /**
     * Releases this file handle without closing it
     *
     * @throws CIFSException if an error occurs while releasing the handle
     */
    void release() throws CIFSException;

    /**
     * Returns the initial size of the file when it was opened
     *
     * @return the file size when it was opened
     */

            return null;
        }).when(mockDcerpcHandle).sendrecv(any(MsrpcLsarClose.class));

        // Close once
        handle.close();

        // Act
        // Try to close again
        handle.close();

        // Assert
        // Verify sendrecv was called once for open and only once for close
        verify(mockDcerpcHandle, times(1)).sendrecv(any(MsrpcLsarOpenPolicy2.class));

        CloseableUtil.close(out);
    }

    private static class NotifyOutputStream extends OutputStream {
        private String notify_;

        @Override
        public void write(final int arg0) throws IOException {
        }

        @Override
        public void close() throws IOException {
            super.close();
            notify_ = "closed";
        }

        }

        @Test
        @DisplayName("Should close pool with active transports")
        void testClosePoolWithActiveTransports() throws CIFSException {
            // Given
            when(transportPool.close()).thenReturn(true);

            // When
            boolean result = transportPool.close();

            // Then
            assertTrue(result);
            verify(transportPool).close();

            return invocation.getArgument(1);
        });

        // When: Create iterator and close multiple times
        NetServerEnumIterator iterator = new NetServerEnumIterator(parent, treeHandle, "*", 0, null);

        iterator.close();
        iterator.close(); // Second close should be safe

        // Then: Tree handle should be released only once
        verify(treeHandle, times(1)).release();

        assertEquals("one", it.next().getName()); // consume initial
        // Next call should handle CIFSException and close iterator
        assertFalse(it.hasNext()); // After error, hasNext should return false

        // Assert
        verify(tree, times(1)).release();
    }

    @Test
    @DisplayName("close() closes when there is a next element and releases handle")
    void explicitClose() throws Exception {
        // Arrange

    checkNotClosed();
    if (target instanceof Flushable) {
      ((Flushable) target).flush();
    }
  }

  @Override
  public void close() throws IOException {
    this.closed = true;
    if (target instanceof Closeable) {
      ((Closeable) target).close();
    }
  }

  @Override
  public Writer append(char c) throws IOException {
    checkNotClosed();
    target.append(c);
    return this;

                SmbConstants.O_CREAT | SmbConstants.O_WRONLY | SmbConstants.O_TRUNC, SmbConstants.FILE_WRITE_DATA,
                SmbConstants.DEFAULT_SHARING);

        // Close the stream
        outputStream.close();

        // When & Then - after close, tmp is null so write(int) will throw NullPointerException
        // This is the actual behavior of the implementation

            executor.shutdown();
        }
    }

    /**
     * Test close() method
     */
    @Test
    void testClose() throws CIFSException {
        // Execute
        watchHandle.close();

        // Verify close was called
        verify(watchHandle, times(1)).close();
    }

    /**
     * Test close() method throwing CIFSException
     */
    @Test

        // After last element, hasNext should be false and calling close() should send Smb2CloseRequest once
        assertFalse(it.hasNext(), "Iterator should be exhausted");

        // Close explicitly to exercise doCloseInternal
        it.close();

        // Verify interactions: one create, two additional directory queries (for fetchMore), one close