Add chart freshness diagnostics

2026-06-10 15:34:34 +08:00
parent ba012736c9
commit 5a7d302d11
14 changed files with 833 additions and 42 deletions
@@ -4,6 +4,7 @@ from fastapi.testclient import TestClient

 from web.app import app
 from web.routers import sse_router
+from web.sse_manager import SseManager


 def _decode_sse_events(text: str):
@@ -15,6 +16,25 @@ def _decode_sse_events(text: str):
    return events


+def test_sse_format_event_stamps_emit_time_for_latency_diagnostics(monkeypatch):
+    monkeypatch.setattr("web.sse_manager.time.time", lambda: 1780750904.5)
+
+    frame = SseManager._format_event(
+        {
+            "type": "city_observation_patch.v1",
+            "revision": 123,
+            "city": "busan",
+            "source": "amos",
+            "ts": 1780750864062,
+            "payload": {"temp": 23.0},
+        }
+    )
+
+    event = _decode_sse_events(frame)[0]
+    assert event["sse_emitted_at_ms"] == 1780750904500
+    assert event["payload"]["temp"] == 23.0
+
+
 def test_events_endpoint_replays_only_requested_cities(monkeypatch):
    captured = {}