f1ap-du: fix unit tests for ue context setup. Issue: correctly handle transmit notification

Author: frankist

tests/unittests/f1ap/du/f1ap_du_test_helpers.cpp

@@ -341,6 +341,7 @@ void f1ap_du_test::run_ue_context_setup_procedure(du_ue_index_t ue_index, const
   // Report transmission notification back to F1AP.
   std::optional<uint32_t> pdcp_sn = get_pdcp_sn(f1ap_req->rrc_container, pdcp_sn_size::size12bits, true, test_logger);
   ue.f1c_bearers[LCID_SRB1].bearer->handle_transmit_notification(pdcp_sn.value());
+  this->ctrl_worker.run_pending_tasks();
 }
 
 f1ap_ue_configuration_response f1ap_du_test::update_f1ap_ue_config(du_ue_index_t                   ue_index,

tests/unittests/f1ap/du/f1ap_du_ue_context_setup_procedure_test.cpp

@@ -91,6 +91,7 @@ class f1ap_du_ue_context_setup_test : public f1ap_du_test
   void on_rrc_container_transmitted(uint32_t highest_pdcp_sn)
   {
     this->test_ue->f1c_bearers[LCID_SRB1].bearer->handle_transmit_notification(highest_pdcp_sn);
+    this->ctrl_worker.run_pending_tasks();
   }
 
   ue_test_context* test_ue = nullptr;