feat: unify card runtime and event-driven web ui

tests/test_events_route.py

@@ -0,0 +1,44 @@
+from __future__ import annotations
+
+import json
+import unittest
+from types import SimpleNamespace
+
+from routes.sessions import stream_ui_events
+from ui_event_bus import UiEventBus
+
+
+class DummyRequest:
+    def __init__(self, chat_id: str) -> None:
+        self.query_params = {"chat_id": chat_id}
+
+    async def is_disconnected(self) -> bool:
+        return False
+
+
+class EventsRouteTests(unittest.IsolatedAsyncioTestCase):
+    async def test_events_stream_emits_ready_and_published_payload(self) -> None:
+        runtime = SimpleNamespace(event_bus=UiEventBus())
+
+        response = await stream_ui_events(DummyRequest("test-chat"), runtime=runtime)
+        iterator = response.body_iterator
+
+        first_chunk = await anext(iterator)
+        self.assertEqual(first_chunk, ": stream-open\n\n")
+
+        second_chunk = await anext(iterator)
+        ready_payload = json.loads(second_chunk.removeprefix("data: ").strip())
+        self.assertEqual(ready_payload["type"], "events.ready")
+        self.assertEqual(ready_payload["chat_id"], "test-chat")
+
+        await runtime.event_bus.publish(
+            {"type": "cards.changed", "chat_id": "test-chat"},
+            chat_id="test-chat",
+        )
+
+        third_chunk = await anext(iterator)
+        event_payload = json.loads(third_chunk.removeprefix("data: ").strip())
+        self.assertEqual(event_payload["type"], "cards.changed")
+        self.assertEqual(event_payload["chat_id"], "test-chat")
+
+        await iterator.aclose()