chore: fix tracing for text chat mode

api/tests/test_realtime_feedback_events.py

@@ -0,0 +1,53 @@
+from api.services.pipecat.realtime_feedback_events import (
+    build_bot_text_event,
+    build_function_call_end_event,
+    build_node_transition_event,
+    realtime_feedback_event_sort_key,
+    stamp_realtime_feedback_event,
+)
+
+
+def test_build_function_call_end_event_serializes_results():
+    event = build_function_call_end_event(
+        function_name="lookup_contact",
+        tool_call_id="tool-1",
+        result={"contact_id": 42},
+    )
+
+    assert event == {
+        "type": "rtf-function-call-end",
+        "payload": {
+            "function_name": "lookup_contact",
+            "tool_call_id": "tool-1",
+            "result": "{'contact_id': 42}",
+        },
+    }
+
+
+def test_stamp_and_sort_realtime_feedback_events():
+    node_transition = stamp_realtime_feedback_event(
+        build_node_transition_event(
+            node_id="node-1",
+            node_name="Greeting",
+            previous_node_id=None,
+            previous_node_name=None,
+        ),
+        timestamp="2026-01-01T00:00:03+00:00",
+        turn=0,
+        node_id="node-1",
+        node_name="Greeting",
+    )
+    bot_text = stamp_realtime_feedback_event(
+        build_bot_text_event(
+            text="Hello there",
+            timestamp="2026-01-01T00:00:01+00:00",
+        ),
+        timestamp="2026-01-01T00:00:02+00:00",
+        turn=0,
+    )
+
+    events = sorted([node_transition, bot_text], key=realtime_feedback_event_sort_key)
+
+    assert events == [bot_text, node_transition]
+    assert node_transition["node_id"] == "node-1"
+    assert node_transition["node_name"] == "Greeting"