rpc.retval = 0;
            return null;
        }).when(mockDcerpcHandle).sendrecv(any(MsrpcSamrCloseHandle.class));

        // Act
        aliasHandle.close();

        // Assert
        // Verify that sendrecv was called with MsrpcSamrCloseHandle
        verify(mockDcerpcHandle).sendrecv(any(MsrpcSamrCloseHandle.class));

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

        // Act
        handle.close();

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

    @Test

        // No exception thrown by sendrecv for MsrpcSamrConnect4
        doNothing().when(mockHandle).sendrecv(any(MsrpcSamrConnect4.class));

        try (SamrPolicyHandle handle = new SamrPolicyHandle(mockHandle, server, access)) {
            assertNotNull(handle);
            // Verify that sendrecv was called with MsrpcSamrConnect4
            verify(mockHandle, times(1)).sendrecv(any(MsrpcSamrConnect4.class));

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

        // Act
        handle.close();

        // Assert
        // Verify sendrecv was called for open and then for close
        verify(mockDcerpcHandle, times(1)).sendrecv(any(MsrpcSamrOpenDomain.class));
        verify(mockDcerpcHandle, times(1)).sendrecv(closeHandleCaptor.capture());

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

        // Act
        handle.close();

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

    @Test

     * @param maxRecvCnt the maximum number of bytes to receive
     * @return len the number of bytes received
     * @throws IOException if an I/O error occurs
     */
    int sendrecv(byte[] buf, int off, int length, byte[] inB, int maxRecvCnt) throws IOException;

        try {
            handle.sendrecv(rpc);
        } catch (final DcerpcException de) {
            if (de.getErrorCode() != DcerpcError.DCERPC_FAULT_OP_RNG_ERROR) {
                throw de;
            }
            final MsrpcSamrConnect2 rpc2 = new MsrpcSamrConnect2(server, access, this);
            handle.sendrecv(rpc2);
        }
        this.opened = true;
    }

    @Override

            throws IOException {
        this.handle = handle;
        final MsrpcSamrOpenAlias rpc = new MsrpcSamrOpenAlias(domainHandle, access, rid, this);
        handle.sendrecv(rpc);
        if (rpc.retval != 0) {
            throw new SmbException(rpc.retval, false);
        }
    }

    /**
     * Closes this SAM alias handle.
     *

        this.handle = handle;
        if (server == null) {
            server = "\\\\";
        }
        final MsrpcLsarOpenPolicy2 rpc = new MsrpcLsarOpenPolicy2(server, access, this);
        handle.sendrecv(rpc);
        if (rpc.retval != 0) {
            throw new SmbException(rpc.retval, false);
        }
        this.opened = true;
    }

    @Override
    public synchronized void close() throws IOException {

            throws IOException {
        this.handle = handle;
        final MsrpcSamrOpenAlias rpc = new MsrpcSamrOpenAlias(domainHandle, access, rid, this);
        handle.sendrecv(rpc);
        if (rpc.retval != 0) {
            throw new SmbException(rpc.retval, false);
        }
        this.opened = true;
    }

    @Override
    public synchronized void close() throws IOException {