增加接口测试功能

conftest.py

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+import pytest
+import asyncio
+from unittest.mock import AsyncMock
+from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession
+from sqlalchemy.orm import sessionmaker
+
+# 测试数据库配置
+TEST_DATABASE_URL = "sqlite+aiosqlite:///./test.db"
+
+@pytest.fixture(scope="session")
+def event_loop():
+    """创建一个事件循环实例用于测试"""
+    loop = asyncio.get_event_loop_policy().new_event_loop()
+    yield loop
+    loop.close()
+
+@pytest.fixture
+async def test_engine():
+    """创建测试数据库引擎"""
+    from sqlalchemy.ext.asyncio import create_async_engine
+    engine = create_async_engine(TEST_DATABASE_URL, echo=False)
+    yield engine
+    await engine.dispose()
+
+@pytest.fixture
+async def test_db_session(test_engine):
+    """创建测试数据库会话"""
+    from app.database import Base
+    
+    # 创建所有表
+    async with test_engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)
+    
+    # 创建会话
+    async_session = sessionmaker(
+        test_engine, class_=AsyncSession, expire_on_commit=False
+    )
+    
+    async with async_session() as session:
+        yield session
+    
+    # 清理：删除所有表
+    async with test_engine.begin() as conn:
+        await conn.run_sync(Base.metadata.drop_all)