test(analytics): health 契约加深——ISO 序列化断言/空库6实体/诊断端点500有意注释

Co-Authored-By: Claude Code <noreply@anthropic.com>

yunke-server/tests/test_analytics_api.py

@@ -1,7 +1,12 @@
 """/api/analytics/health:E0-lite 冒烟。"""
 from __future__ import annotations
 
-from app.db.models import MsgDailyStats
+import datetime as dt
+
+from app.db.models import Customer, MsgDailyStats
+
+# naive:updated_at 列是无时区 DateTime;fromisoformat 构造不触发 DTZ 检查
+_SEEN = "2026-09-04T12:00:00"
 
 
 async def test_health_empty(make_client):
@@ -13,7 +18,8 @@ async def test_health_empty(make_client):
     assert r.status_code == 200
     body = r.json()
     assert body["data_as_of"] is None
-    assert any(e["table"] == "message" for e in body["entities"])
+    assert len(body["entities"]) == 6
+    assert all(e["last_seen"] is None for e in body["entities"])
 
 
 async def test_health_with_stats(make_client):
@@ -31,9 +37,21 @@ async def test_health_with_stats(make_client):
                 last_is_send=False,
             )
         )
+        session.add(
+            Customer(
+                friend_id="f1",
+                channel="wechat",
+                updated_at=dt.datetime.fromisoformat(_SEEN),
+            )
+        )
         await session.commit()
 
     client = await make_client(seed)
     r = await client.get("/api/analytics/health")
     assert r.status_code == 200
     assert r.json()["data_as_of"] == 1756900000000
+    entities = {e["table"]: e["last_seen"] for e in r.json()["entities"]}
+    # 前端契约:last_seen 必须是 ISO 字符串(fromisoformat 可解析)
+    assert dt.datetime.fromisoformat(entities["customer"]) == dt.datetime.fromisoformat(
+        _SEEN
+    )