sccp: add debug output when the expected PDU doesn't match

Change-Id: I0fab79fd333f4fdbd5b249d6ede26a5aad214ef1

sccp/SCCP_Tests_RAW.ttcn

@@ -248,6 +248,7 @@ testcase TC_it_avoids_tiar() runs on SCCP_Test_RAW_CT {
 	var SCCP_PAR_Address calling, called;
 	var OCT3 remote_lref;
 	var boolean it_received := false;
+	var SCCP_MTP3_TRANSFERind rx;
 
 	g_demo_sccp_timer_ias := 1;
 	g_demo_sccp_timer_iar := 3;
@@ -273,6 +274,10 @@ testcase TC_it_avoids_tiar() runs on SCCP_Test_RAW_CT {
 		setverdict(fail, "Unexpected SCCP RLSD received");
 		self.stop;
 		}
+	[] MTP3.receive(tr_SCCP_MTP3_TRANSFERind(*)) -> value rx {
+		setverdict(fail, "Unexpected MTP/SCCP TRANSFERind received: ", rx);
+		self.stop;
+		}
 	[] MTP3.receive {
 		setverdict(fail, "Unexpected MTP/SCCP received");
 		self.stop;
@@ -341,6 +346,7 @@ function f_scmg_xceive(SCCP_PAR_Address calling, SCCP_PAR_Address called,
 		       boolean accept_other_called_resp := false) runs on SCCP_Test_RAW_CT
 {
 	var boolean exp_something := true;
+	var SCCP_MTP3_TRANSFERind rx;
 	timer T := 5.0;
 
 	if (istemplatekind(rx_exp, "omit")) {
@@ -357,8 +363,11 @@ function f_scmg_xceive(SCCP_PAR_Address calling, SCCP_PAR_Address called,
 	[exp_something and accept_other_called_resp] MTP3.receive(tr_SCCP_MTP3_TRANSFERind(tr_SCCP_UDT(called, ?, decmatch rx_exp))) {
 		setverdict(pass);
 		}
-	[] MTP3.receive(tr_SCCP_MTP3_TRANSFERind(tr_SCCP_UDT(called, calling, ?))) {
-		setverdict(fail, "Received unexpected SCCP waiting for ", rx_exp);
+	[] MTP3.receive(tr_SCCP_MTP3_TRANSFERind(tr_SCCP_UDT(called, calling, ?))) -> value rx {
+		setverdict(fail, "Received unexpected SCCP/MTP3 TRANSFERind (specific): ", rx, " but waiting for (specific) ", rx_exp);
+		}
+	[] MTP3.receive(tr_SCCP_MTP3_TRANSFERind(*)) -> value rx {
+		setverdict(fail, "Received unexpected SCCP/MTP3 TRANSFERind (*): ", rx, " but waiting for ", rx_exp);
 		}
 	[] MTP3.receive {
 		setverdict(fail, "Received unexpected waiting for ", rx_exp);