# coding=utf-8
"""Scripts/bin 测试公共 fixture.

预先注入 pymysql mock，使 db_pool 模块能在无 pymysql 环境下被导入。
"""

import sys
import types

# db_pool.py 顶层 import pymysql，测试环境可能未安装，
# 注入一个空模块使导入成功，具体行为由测试中的 patch 控制。
if "pymysql" not in sys.modules:
    _pymysql_mock = types.ModuleType("pymysql")
    _pymysql_mock.connect = lambda **kw: None
    _pymysql_mock.Error = type("Error", (Exception,), {})
    _pymysql_mock.OperationalError = type("OperationalError", (Exception,), {})
    sys.modules["pymysql"] = _pymysql_mock