PCU_Tests: verify that PacketCellChangeContine contains an ARFCN and BSIC

The testcase TC_nacc_outbound_success tests the NACC procedure. The cell
that is proposed in the PacketCellChangeNotification is a GERAN cell.
This means that the PCU should conclude the procedure with a
PacketCellChangeNotification that contains the ARFCN and BSIC of the
proposed cell. Let's make sure that this actually is the case.

Related: OS#6044
Change-Id: I4b8f3312088e3d2bc4b90702485e7c6a8d39f954
diff --git a/pcu/PCU_Tests.ttcn b/pcu/PCU_Tests.ttcn
index a1da67b..440d133 100644
--- a/pcu/PCU_Tests.ttcn
+++ b/pcu/PCU_Tests.ttcn
@@ -5332,13 +5332,14 @@
 	}
 }
 
-/* Start NACC from MS side */
+/* Start NACC from MS side, propose a GERAN cell */
 private function f_outbound_nacc_success(inout GprsMS ms, PCUIF_info_ind info_ind,
 					 boolean exp_rac_ci_query := true, boolean exp_si_query := true,
 					 boolean skip_final_ctrl_ack := false,
 					 boolean use_old_ctrl_iface := false)
 runs on RAW_PCU_Test_CT {
 	var template (value) RlcmacUlCtrlMsg cell_chg_notif;
+	var template RlcmacDlCtrlMsg cell_chg_cont;
 	var RlcmacDlBlock dl_block;
 	var uint32_t sched_fn;
 	var GsmArfcn req_arfcn := 862;
@@ -5361,9 +5362,15 @@
 	/* Announce SI back to MS, continue NACC procedure */
 	f_ms_handle_pkt_neighbor_cell_data(ms, si_default);
 
-	/* Obtain a Downlink block and make sure it is a Pkt Cell Chg Continue */
+	/* Obtain a Downlink block and make sure it is a PacketCellChangeContinue, also verify that
+	 * the PacketCellChangeContinue message contains the ARFCN and BSIC which was proposed in
+	 * the PacketCellChangeNotification before. */
 	f_rx_rlcmac_dl_block(dl_block, sched_fn);
-	if (not match(dl_block, tr_RLCMAC_DL_CTRL(?, tr_RlcMacDlCtrl_PKT_CELL_CHG_CONTINUE))) {
+	cell_chg_cont := tr_RlcMacDlCtrl_PKT_CELL_CHG_CONTINUE
+	cell_chg_cont.u.cell_chg_continue.arfcn_bsic_presence := '1'B
+	cell_chg_cont.u.cell_chg_continue.arfcn := req_arfcn;
+	cell_chg_cont.u.cell_chg_continue.bsic := req_bsic;
+	if (not match(dl_block, tr_RLCMAC_DL_CTRL(?, cell_chg_cont))) {
 		setverdict(fail, "Rx unexpected DL block: ", dl_block);
 		f_shutdown(__BFILE__, __LINE__);
 	}