fix(analytics): churn 排序决胜列+active_days去重日+边界测试

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

yunke-server/tests/test_analytics_churn_unreplied.py

@@ -1,6 +1,8 @@
 """A3 三分法流失 + B2 该回未回。"""
 from __future__ import annotations
 
+import pytest
+
 from app.analytics import metrics
 from app.db.models import Customer, MsgDailyStats, Staff
 
@@ -77,3 +79,58 @@ async def test_churn_endpoint_422(make_client):
     assert r.status_code == 422
     r2 = await client.get("/api/analytics/churn", params={"channel": "sms"})
     assert r2.status_code == 422
+
+
+async def test_churn_tier_membership_and_min_msgs_boundary(make_client, monkeypatch):
+    """tier60/90 会员资格([tier, next) 区间)+ min_msgs 恰等阈值的包含边界。"""
+    monkeypatch.setattr(metrics, "_now_ms", lambda: _NOW)
+    day_ms = 86_400_000
+
+    async def seed(session):
+        # 沉默 75 天:∈[60,90) → tier60 含、tier30 不含
+        session.add(_cust("c75", last_chat=_NOW - 75 * day_ms))
+        # 沉默 100 天:≥90 → tier90 含、tier60 不含
+        session.add(_cust("c100", last_chat=_NOW - 100 * day_ms))
+        # 历史消息恰好 5 条(=min_msgs,含边界)+ 沉默 45 天 → 入 tier30
+        session.add(_cust("c5", last_chat=_NOW - 45 * day_ms))
+        for peer, n in (("c75", 6), ("c100", 6), ("c5", 5)):
+            session.add(MsgDailyStats(channel="wechat", owner_account_id="wx1",
+                                      peer_kind="friend", peer_id=peer, day=20260601,
+                                      send_cnt=n, recv_cnt=0,
+                                      last_ts=_NOW - 110 * day_ms,
+                                      last_is_send=True))
+        await session.commit()
+
+        t30 = await metrics.churn(session, channel="wechat", kind="real",
+                                  tier=30, min_msgs=5, page=1, page_size=20)
+        assert {r["friend_id"] for r in t30["items"]} == {"c5"}
+        t60 = await metrics.churn(session, channel="wechat", kind="real",
+                                  tier=60, min_msgs=5, page=1, page_size=20)
+        assert {r["friend_id"] for r in t60["items"]} == {"c75"}
+        t90 = await metrics.churn(session, channel="wechat", kind="real",
+                                  tier=90, min_msgs=5, page=1, page_size=20)
+        assert {r["friend_id"] for r in t90["items"]} == {"c100"}
+
+    await make_client(seed)
+
+
+async def test_churn_handover_excludes_null_user(make_client, monkeypatch):
+    """user_id NULL(未映射归属)的客户不进待交接名单。"""
+    monkeypatch.setattr(metrics, "_now_ms", lambda: _NOW)
+    async def seed(session):
+        session.add(Staff(user_id="u9", name="离职的", is_on_job=False))
+        session.add(_cust("c_hand", user_id="u9"))
+        session.add(_cust("c_nouser", user_id=None))
+        await session.commit()
+        p = await metrics.churn(session, channel="wechat", kind="handover",
+                                tier=30, min_msgs=5, page=1, page_size=20)
+        assert {r["friend_id"] for r in p["items"]} == {"c_hand"}
+
+    await make_client(seed)
+
+
+def test_next_tier_bad_tier_raises_value_error():
+    """非法 tier 报 ValueError(与 churn 的 kind 分支报错类型一致)。"""
+    with pytest.raises(ValueError):
+        metrics._next_tier(45)
+    assert metrics._next_tier(90) == 10_000  # 90 档=≥90 的开区间上限