void testCloseDoesNotThrowException() {
        // When & Then
        assertDoesNotThrow(() -> {
            try {
                emptyIterator.close();
            } catch (CIFSException e) {
                throw new RuntimeException(e);
            }
        }, "close() should not throw any exception");
    }

    @Test
    @DisplayName("remove should not throw any exception")

     */
    SmbPipeInputStream(final SmbPipeHandleImpl handle, final SmbTreeHandleImpl th) throws CIFSException {
        super(handle.getPipe(), th, null);
        this.handle = handle;
    }

    /**
     * Ensures that the tree connection is established.
     *
     * @return the tree handle implementation
     * @throws CIFSException if a connection error occurs
     */

     *         <code>TYPE_PRINTER</code> or <code>TYPE_COMM</code>.
     * @throws CIFSException if the type cannot be determined
     */
    int getType() throws CIFSException;

    /**
     * Determines whether this resource represents a workgroup reference.
     *
     * @return whether this is a workgroup reference
     * @throws CIFSException if the determination cannot be made
     */

        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();
    }

    /**
     * Gets the pipe handle implementation for this output stream.
     *

        byte[] flagData = new byte[4];
        SMBUtil.writeInt4(0x12345678, flagData, 0);
        byte[] avPairData = createAvPairData(AvPair.MsvAvFlags, flagData);

        CIFSException exception = assertThrows(CIFSException.class, () -> {
            AvPairs.decode(avPairData);
        });

        assertEquals("Missing AvEOL", exception.getMessage(), "Should throw exception with correct message");
    }

    }

    @Test
    void testClose() throws CIFSException {
        assertFalse(context.isCloseCalled());

        boolean result = context.close();

        assertFalse(result); // AbstractCIFSContext always returns false for close()
        assertTrue(context.isCloseCalled());
    }

    @Test
    void testRun_successfulClose() throws CIFSException {
        // Simulate the shutdown hook being run

            throws CIFSException {
        return send(request, response, Collections.<RequestParam> emptySet());
    }

    <T extends CommonServerMessageBlockResponse> T send(final CommonServerMessageBlockRequest request, final T response,
            final Set<RequestParam> params) throws CIFSException {

        this.next = advance();
        return n;
    }

    /**
     * {@inheritDoc}
     *
     * @throws CIFSException
     *
     * @see java.lang.AutoCloseable#close()
     */
    @Override
    public void close() throws CIFSException {
        this.delegate.close();
    }

    @Override
    public void remove() {
        this.delegate.remove();
    }

    }

    @Test
    @DisplayName("send throws CIFSException for null request when implementation does")
    void send_nullRequest_throws() throws Exception {
        // Arrange
        when(tree.send(isNull())).thenThrow(new CIFSException("null request"));

        // Act
        CIFSException ex = assertThrows(CIFSException.class, () -> tree.send(null));

        // Assert

        // Close and verify subsequent calls throw
        handle.close();
        CIFSException ex1 = assertThrows(CIFSException.class, handle::getInput, "getInput after close must throw");
        assertTrue(ex1.getMessage().contains("Already closed"));
        CIFSException ex2 = assertThrows(CIFSException.class, handle::getOutput, "getOutput after close must throw");