Add unit tests for models and services

- Implemented unit tests for Object model including folder and file creation, properties, and path retrieval.
- Added unit tests for Setting model covering creation, unique constraints, and type enumeration.
- Created unit tests for User model focusing on user creation, uniqueness, and group relationships.
- Developed unit tests for Login service to validate login functionality, including 2FA and token generation.
- Added utility tests for JWT creation and verification, ensuring token integrity and expiration handling.
- Implemented password utility tests for password generation, hashing, and TOTP verification.

tests/check_imports.py

@@ -0,0 +1,113 @@
+#!/usr/bin/env python
+"""
+检查测试所需的所有导入是否可用
+
+运行此脚本以验证测试环境配置是否正确。
+"""
+import sys
+import traceback
+
+
+def check_import(module_name: str, description: str) -> bool:
+    """检查单个模块导入"""
+    try:
+        __import__(module_name)
+        print(f"✅ {description}: {module_name}")
+        return True
+    except ImportError as e:
+        print(f"❌ {description}: {module_name}")
+        print(f"   错误: {e}")
+        return False
+
+
+def main():
+    """主检查函数"""
+    print("=" * 60)
+    print("DiskNext Server 测试环境检查")
+    print("=" * 60)
+    print()
+
+    checks = [
+        # 测试框架
+        ("pytest", "测试框架"),
+        ("pytest_asyncio", "异步测试支持"),
+
+        # 数据库
+        ("sqlmodel", "SQLModel ORM"),
+        ("sqlalchemy", "SQLAlchemy"),
+        ("aiosqlite", "异步 SQLite 驱动"),
+
+        # FastAPI
+        ("fastapi", "FastAPI 框架"),
+        ("httpx", "HTTP 客户端"),
+
+        # 工具库
+        ("loguru", "日志库"),
+        ("argon2", "密码哈希"),
+        ("jwt", "JWT 令牌"),
+        ("pyotp", "TOTP 两步验证"),
+        ("itsdangerous", "签名工具"),
+
+        # 项目模块
+        ("models", "数据库模型"),
+        ("models.user", "用户模型"),
+        ("models.group", "用户组模型"),
+        ("models.object", "对象模型"),
+        ("models.setting", "设置模型"),
+        ("models.policy", "策略模型"),
+        ("models.database", "数据库连接"),
+        ("utils.password.pwd", "密码工具"),
+        ("utils.JWT.JWT", "JWT 工具"),
+        ("service.user.login", "登录服务"),
+    ]
+
+    results = []
+    for module, desc in checks:
+        result = check_import(module, desc)
+        results.append((module, desc, result))
+
+    print()
+    print("=" * 60)
+    print("检查结果")
+    print("=" * 60)
+
+    success_count = sum(1 for _, _, result in results if result)
+    total_count = len(results)
+
+    print(f"成功: {success_count}/{total_count}")
+
+    failed = [(m, d) for m, d, r in results if not r]
+    if failed:
+        print()
+        print("失败的导入:")
+        for module, desc in failed:
+            print(f"  - {desc}: {module}")
+        print()
+        print("请运行以下命令安装依赖:")
+        print("  uv sync")
+        print("  或")
+        print("  pip install -e .")
+        return 1
+    else:
+        print()
+        print("✅ 所有检查通过! 测试环境配置正确。")
+        print()
+        print("运行测试:")
+        print("  pytest                    # 运行所有测试")
+        print("  pytest --cov              # 带覆盖率运行")
+        print("  python run_tests.py       # 使用测试脚本")
+        return 0
+
+
+if __name__ == "__main__":
+    try:
+        exit_code = main()
+    except Exception as e:
+        print()
+        print("=" * 60)
+        print("检查过程中发生错误:")
+        print("=" * 60)
+        traceback.print_exc()
+        exit_code = 1
+
+    sys.exit(exit_code)