袁聪的最后一次完善更新

tests/unit/service/test_financial_nl2sql_service.py

@@ -1,3 +1,5 @@
+from datetime import date
+
 import pytest
 
 from app.core.contracts import RequestContext
@@ -16,6 +18,12 @@ def context(**updates):
     return base.model_copy(update=updates)
 
 
+def test_query_rows_convert_date_values_to_json_strings() -> None:
+    row = FinancialNL2SQLService._jsonable({"nav_date": date(2026, 9, 10)})
+
+    assert row == {"nav_date": "2026-09-10"}
+
+
 @pytest.mark.asyncio
 async def test_generates_read_only_market_sql_with_product_filter() -> None:
     result = await FinancialNL2SQLService().query(