Gate one-open-per-expiry by historical expiry_ymd across days.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/tests/test_skip_expiry_next.py

@@ -1,11 +1,14 @@
-"""空仓选约：跳过当日已用到期与残留待结算到期。"""
+"""空仓选约：跳过历史上已用到期与残留待结算到期。"""
 
 from __future__ import annotations
 
+from datetime import datetime
+from zoneinfo import ZoneInfo
+
 from app.strategy.clock import (
     expiry_blocked_by_one_per_day,
     pending_residual_expiry_ymds,
-    used_expiry_ymds_for_day,
+    used_expiry_ymds,
 )
 
 
@@ -22,32 +25,29 @@ class _FakeDB:
     def fetchall(self, sql: str, params: tuple = ()) -> list[dict]:
         s = " ".join(sql.split()).lower()
         if "from groups" in s:
-            like = params[0] if params else ""
-            prefix = like.replace("%", "")
             return [
                 r
                 for r in self._groups
-                if str(r.get("group_id", "")).startswith(prefix)
+                if str(r.get("expiry_ymd") or "").strip()
             ]
         if "from residual_options" in s:
             return [r for r in self._residuals if r.get("status") == "pending"]
         return []
 
 
-def test_used_expiry_ymds_for_day() -> None:
+def test_used_expiry_ymds_across_calendar_days() -> None:
+    """8.2 开过 260803 后，8.3 零点仍须拦截同到期。"""
     db = _FakeDB(
         groups=[
             {"group_id": "G-20260802-01", "expiry_ymd": "260803"},
             {"group_id": "G-20260801-01", "expiry_ymd": "260802"},
         ]
     )
-    from datetime import datetime
-    from zoneinfo import ZoneInfo
-
-    now = datetime(2026, 8, 2, 12, 0, tzinfo=ZoneInfo("Asia/Shanghai"))
-    assert used_expiry_ymds_for_day(db, now) == {"260803"}
-    assert expiry_blocked_by_one_per_day("260803", {"260803"}, enabled=True)
-    assert not expiry_blocked_by_one_per_day("260804", {"260803"}, enabled=True)
+    now_aug3 = datetime(2026, 8, 3, 0, 0, 2, tzinfo=ZoneInfo("Asia/Shanghai"))
+    used = used_expiry_ymds(db, now_aug3)
+    assert used == {"260803", "260802"}
+    assert expiry_blocked_by_one_per_day("260803", used, enabled=True)
+    assert not expiry_blocked_by_one_per_day("260804", used, enabled=True)
 
 
 def test_pending_residual_expiry_ymds() -> None: