pcu: Add SNS tests for SGSN-originated BVC-RESET handling

Change-Id: Ib6b80acf98711f4749da4faf549b02ff2b82425f
diff --git a/pcu/PCU_Tests_RAW.ttcn b/pcu/PCU_Tests_RAW.ttcn
index a30829e..6022d36 100644
--- a/pcu/PCU_Tests_RAW.ttcn
+++ b/pcu/PCU_Tests_RAW.ttcn
@@ -172,6 +172,29 @@
 		}
 }
 
+/* Transmit BSSGP RESET for given BVCI and expect ACK */
+function f_tx_bvc_reset_rx_ack(BssgpBvci bvci, integer idx := 0, boolean exp_ack := true)
+runs on RAW_NS_CT {
+	var PDU_BSSGP bssgp_tx := valueof(ts_BVC_RESET(BSSGP_CAUSE_NET_SV_CAP_MOD_GT_ZERO_KBPS, bvci,
+							mp_gb_cfg.cell_id));
+	timer T := 5.0;
+	NSCP[idx].send(t_NS_Send(g_ns_conn_id[idx], ts_NS_UNITDATA(t_SduCtrlB, 0, enc_PDU_BSSGP(bssgp_tx))));
+	T.start;
+	alt {
+	[exp_ack] NSCP[idx].receive(t_NS_RecvFrom(tr_NS_UNITDATA(t_SduCtrlB, 0,
+						  decmatch tr_BVC_RESET_ACK(bvci, ?)))) {
+		setverdict(pass);
+		}
+	[exp_ack] T.timeout {
+		setverdict(fail, "No response to BVC-RESET");
+		}
+	[not exp_ack] T.timeout {
+		setverdict(pass);
+		}
+	[] NSCP[idx].receive { repeat; }
+	}
+}
+
 /* Receive a BSSGP RESET for given BVCI and ACK it */
 altstep as_rx_bvc_reset_tx_ack(BssgpBvci bvci, boolean oneshot := false, integer idx := 0) runs on RAW_NS_CT {
 	var NS_RecvFrom ns_rf;