cu_cp,rrc: Add unittest for reestablishment because of failed reconfiguration

Author: FabianEckermann

tests/unittests/rrc/rrc_ue_reest_proc_test.cpp

@@ -64,6 +64,25 @@ TEST_F(rrc_ue_reest, when_valid_reestablishment_request_received_but_security_co
   check_initial_ue_message_sent();
 }
 
+/// Test the RRC Reestablishment
+TEST_F(rrc_ue_reest, when_reestablishment_request_with_cause_recfg_fail_received_then_rrc_setup_sent)
+{
+  connect_amf();
+  ue_index_t old_ue_index = uint_to_ue_index(0);
+  add_ue_reestablishment_context(old_ue_index);
+  receive_valid_reestablishment_request_with_cause_recfg_fail(1, to_rnti(0x4601));
+
+  // check if the RRC Setup Request was generated
+  ASSERT_EQ(get_srb0_pdu_type(), asn1::rrc_nr::dl_ccch_msg_type_c::c1_c_::types::rrc_setup);
+
+  // check if SRB1 was created
+  check_srb1_exists();
+
+  receive_setup_complete();
+
+  check_initial_ue_message_sent();
+}
+
 /// Test the RRC Reestablishment
 TEST_F(rrc_ue_reest,
        when_valid_reestablishment_request_for_same_du_received_then_rrc_reestablishment_with_old_ue_index_sent)

tests/unittests/rrc/rrc_ue_test_helpers.h

@@ -182,6 +182,13 @@ class rrc_ue_test_helper
     rrc_ue->get_ul_ccch_pdu_handler().handle_ul_ccch_pdu(generate_valid_rrc_reestablishment_request_pdu(pci, c_rnti));
   }
 
+  void receive_valid_reestablishment_request_with_cause_recfg_fail(pci_t pci, rnti_t c_rnti)
+  {
+    // inject RRC Reestablishment Request into UE object
+    rrc_ue->get_ul_ccch_pdu_handler().handle_ul_ccch_pdu(generate_valid_rrc_reestablishment_request_pdu(
+        pci, c_rnti, "0111011100001000", asn1::rrc_nr::reest_cause_opts::options::recfg_fail));
+  }
+
   void receive_reestablishment_complete()
   {
     // inject RRC Reestablishment complete

tests/unittests/rrc/rrc_ue_test_messages.cpp

@@ -198,8 +198,10 @@ byte_buffer srsran::srs_cu_cp::generate_invalid_rrc_reestablishment_request_pdu(
   return pdu;
 }
 
-byte_buffer
-srsran::srs_cu_cp::generate_valid_rrc_reestablishment_request_pdu(pci_t pci, rnti_t c_rnti, std::string short_mac_i)
+byte_buffer srsran::srs_cu_cp::generate_valid_rrc_reestablishment_request_pdu(pci_t                       pci,
+                                                                              rnti_t                      c_rnti,
+                                                                              std::string                 short_mac_i,
+                                                                              asn1::rrc_nr::reest_cause_e cause)
 {
   byte_buffer   pdu;
   asn1::bit_ref bref{pdu};
@@ -210,7 +212,7 @@ srsran::srs_cu_cp::generate_valid_rrc_reestablishment_request_pdu(pci_t pci, rnt
   rrc_reest_req.rrc_reest_request.ue_id.c_rnti = c_rnti;
   rrc_reest_req.rrc_reest_request.ue_id.pci    = pci;
   rrc_reest_req.rrc_reest_request.ue_id.short_mac_i.from_string(short_mac_i);
-  rrc_reest_req.rrc_reest_request.reest_cause = asn1::rrc_nr::reest_cause_opts::options::other_fail;
+  rrc_reest_req.rrc_reest_request.reest_cause = cause;
   rrc_reest_req.rrc_reest_request.spare.from_number(0);
 
   const asn1::SRSASN_CODE ret = ul_ccch_msg.pack(bref);

tests/unittests/rrc/rrc_ue_test_messages.h

@@ -33,8 +33,11 @@ rrc_reconfiguration_procedure_request generate_rrc_reconfiguration_procedure_req
 byte_buffer generate_invalid_rrc_reestablishment_request_pdu(pci_t pci, rnti_t c_rnti);
 
 /// \brief Generate RRC Container with valid RRC Reestablishment Request.
-byte_buffer
-generate_valid_rrc_reestablishment_request_pdu(pci_t pci, rnti_t c_rnti, std::string short_mac_i = "0111011100001000");
+byte_buffer generate_valid_rrc_reestablishment_request_pdu(
+    pci_t                       pci,
+    rnti_t                      c_rnti,
+    std::string                 short_mac_i = "0111011100001000",
+    asn1::rrc_nr::reest_cause_e cause       = asn1::rrc_nr::reest_cause_opts::options::other_fail);
 
 /// \brief Generate RRC Container with RRC Reestablishment Complete.
 byte_buffer generate_rrc_reestablishment_complete_pdu();