改用mysql

backend/tests/conftest.py

@@ -1,7 +1,7 @@
-"""测试配置：每个测试用例使用隔离的内存数据库。"""
+"""测试配置：每个测试用例使用隔离的内存 SQLite（不依赖远程 MySQL）。"""
 
 import pytest
-from sqlalchemy import create_engine
+from sqlalchemy import create_engine, event
 from sqlalchemy.orm import sessionmaker
 
 from app.core import db as db_module
@@ -10,16 +10,10 @@ from app.models import Base
 
 @pytest.fixture(autouse=True)
 def _isolate_db(tmp_path, monkeypatch):
-    """每个测试用例：创建独立内存 SQLite → 建表 → 替换全局引擎 → 测试结束自动清理。
-
-    这确保测试之间完全隔离，不共享任何数据。
-    """
+    """每个测试用例：创建独立内存 SQLite → 建表 → 替换全局引擎 → 测试结束自动清理。"""
     test_db_url = f"sqlite:///{tmp_path}/test.db"
     engine = create_engine(test_db_url, connect_args={"check_same_thread": False})
 
-    # 启用 WAL + 外键
-    from sqlalchemy import event, text
-
     @event.listens_for(engine, "connect")
     def _set_pragma(dbapi_conn, _):
         cursor = dbapi_conn.cursor()
@@ -34,9 +28,33 @@ def _isolate_db(tmp_path, monkeypatch):
     monkeypatch.setattr(db_module, "_engine", engine)
     monkeypatch.setattr(db_module, "_session_factory", test_factory)
 
+    # Mock settings 让 is_mysql 返回 False
+    from app.core.config import get_settings, Settings
+    original_settings = get_settings()
+
+    class TestSettings:
+        """测试用 settings mock，保持 SQLite 行为。"""
+        environment = "local"
+        database_url = test_db_url
+        storage_root = str(tmp_path)
+        default_storage_quota = 104_857_600
+        default_max_file_size = 20_971_520
+        rate_limit_per_token_per_min = 60
+        rate_limit_per_ip_per_min = 30
+        frontend_origin = "http://localhost:5173"
+        is_production = False
+        is_mysql = False
+        is_sqlite = True
+
+        @property
+        def storage_root_path(self):
+            from pathlib import Path
+            return Path(self.storage_root)
+
+    monkeypatch.setattr("app.core.config.get_settings", lambda: TestSettings())
+
     # 清空内存 session 存储
     from app.core import session as session_module
-
     session_module._store.clear()
 
     yield