}

            return response;

        } catch (Exception e) {
            throw new IOException("Witness unregister RPC failed", e);
        }
    }

    /**
     * Sends a witness heartbeat.
     *
     * @param request the heartbeat request
     * @return the heartbeat response
     * @throws IOException if the RPC call fails
     */

            } catch (final IOException ioe) {
                state = 0;
                throw ioe;
            }
        }
    }

    /**
     * Sends a DCERPC message and receives the response
     * @param msg the message to send
     * @throws DcerpcException if the RPC operation fails
     * @throws IOException if an I/O error occurs
     */

            }
        }
    }

    /**
     * Monitors active registrations and sends heartbeats.
     */
    private void monitorRegistrations() {
        for (WitnessRegistration registration : registrations.values()) {
            if (registration.getState() == WitnessRegistrationState.REGISTERED) {
                // Send periodic heartbeat
                sendHeartbeat(registration);
            }
        }

        lenient().when(fh.isValid()).thenReturn(true);
        lenient().when(fh.getTree()).thenReturn(tree);

        // Mock both sends and return response
        when(tree.send(any(TransWaitNamedPipe.class), any(TransWaitNamedPipeResponse.class))).thenAnswer(inv -> inv.getArgument(1));
        when(tree.send(any(TransCallNamedPipe.class), any(TransCallNamedPipeResponse.class))).thenAnswer(inv -> inv.getArgument(1));

    @Test
    @DisplayName("setLength(): SMB2 path sends Smb2SetInfoRequest")
    void setLength_smb2_sendsSetInfo() throws Exception {
        SmbRandomAccessFile raf = newInstance("rw", true, false, false);
        SmbFileHandleImpl fh = (SmbFileHandleImpl) getField(raf, "handle");
        SmbTreeHandleImpl tree = fh.getTree();
        // do not actually perform network call

            setup.setup(form -> {
                updateForm(fessConfig, form);
            });
        });
    }

    /**
     * Sends a test mail using the provided notification settings.
     *
     * @param form the mail form containing notification settings
     * @return HTML response after sending test mail
     */
    @Execute

     * initiated by the client (MSIE post requests after successful NTLM SSP
     * authentication). If false and the user has not been authenticated yet
     * the client will be forced to send an authentication (server sends
     * HttpServletResponse.SC_UNAUTHORIZED).
     * @return True if the negotiation is complete, otherwise false
     * @throws IOException if an I/O error occurs

                curReq = next;
                curResp = next.getResponse();
            }
        }
    }

    /**
     * Sends a request and manages the response handling.
     *
     * @param <T> the response type
     * @param request the request to send
     * @param response the response object to populate
     * @param params additional parameters for the request

    }

    @Test
    @DisplayName("send with multiple params returns the stubbed response")
    void send_withParams_returnsResponse() throws Exception {
        // Arrange
        when(tree.send(eq(request), eq(RequestParam.NO_TIMEOUT), eq(RequestParam.NO_RETRY))).thenReturn(response);

        // Act
        CommonServerMessageBlockResponse out = tree.send(request, RequestParam.NO_TIMEOUT, RequestParam.NO_RETRY);

        // Arrange: program send() to simulate first, next, next(NO_MORE_FILES)
        List<String[]> batches = new ArrayList<>();
        batches.add(new String[] { ".", "..", "a", "b" }); // first batch, dot entries filtered
        batches.add(new String[] { "c" }); // second batch
        batches.add(new String[] {}); // last -> NO_MORE_FILES

        // send() answer that mutates the provided response