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msc: f_tc_ho_inter_bsc0(): catch BSSMAP HandoverRequiredReject

It may happen that the target BSC is not yet connected to the MSC.
In this case the MSC rejects handover with HandoverRequiredReject.
Let's catch this PDU to make the verdict cleaner in such case.

Change-Id: I5ba98e323e0c7794554ccb115d7697ad03ccbfa5
---
M msc/MSC_Tests.ttcn
1 file changed, 12 insertions(+), 5 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/06/42106/1

diff --git a/msc/MSC_Tests.ttcn b/msc/MSC_Tests.ttcn
index 5464355..17fac68 100644
--- a/msc/MSC_Tests.ttcn
+++ b/msc/MSC_Tests.ttcn
@@ -6043,12 +6043,19 @@
 	/* Now the action goes on in f_tc_ho_inter_bsc1() */
 
 	/* MSC forwards the RR Handover Command to old BSS */
-	var PDU_BSSAP ho_command;
-	RAN_CONN.receive(tr_BSSMAP_HandoverCommand) -> value ho_command;
+	var PDU_BSSAP pdu_bssap;
+	alt {
+	[] RAN_CONN.receive(tr_BSSMAP_HandoverCommand) -> value pdu_bssap {
+		log("Rx HandoverCommand: ", pdu_bssap);
+		RAN_CONN.receive(tr_BSSMAP_HandoverSucceeded) -> value pdu_bssap;
+		log("Rx HandoverSucceeded: ", pdu_bssap);
+		}
+	[] RAN_CONN.receive(tr_BSSMAP_HandoverRequiredReject) -> value pdu_bssap {
+		setverdict(fail, "Rx HandoverRequiredReject: ", pdu_bssap);
+		Misc_Helpers.f_shutdown(__BFILE__, __LINE__);
+		}
+	}
 
-	log("GOT HandoverCommand", ho_command);
-
-	RAN_CONN.receive(tr_BSSMAP_HandoverSucceeded);
 
 	/* f_tc_ho_inter_bsc1() completes Handover, then expecting a Clear here. */
 	f_expect_clear();

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