refactor(database): isolate configuration transactions

tests/test_user_config_endpoint.py

@@ -0,0 +1,54 @@
+"""用户配置 API 的异步应用端口测试。"""
+
+from types import SimpleNamespace
+from unittest.mock import AsyncMock, MagicMock
+
+import pytest
+
+from app.api.endpoints import user as user_endpoint
+
+
+@pytest.mark.asyncio
+async def test_set_config_waits_for_async_configuration_write(monkeypatch) -> None:
+    """更新接口等待用户配置事务完成后再返回成功。"""
+    service = MagicMock()
+    service.async_set = AsyncMock(return_value=True)
+    monkeypatch.setattr(
+        user_endpoint,
+        "get_configured_user_configuration",
+        lambda: service,
+    )
+
+    response = await user_endpoint.set_config(
+        "theme",
+        "dark",
+        current_user=SimpleNamespace(name="alice"),
+    )
+
+    assert response.success is True
+    service.async_set.assert_awaited_once_with(
+        username="alice",
+        key="theme",
+        value="dark",
+    )
+
+
+@pytest.mark.asyncio
+async def test_get_config_reads_loaded_snapshot(monkeypatch) -> None:
+    """查询接口直接读取已加载的用户配置快照。"""
+    service = MagicMock()
+    service.get.return_value = "dark"
+    monkeypatch.setattr(
+        user_endpoint,
+        "get_configured_user_configuration",
+        lambda: service,
+    )
+
+    response = await user_endpoint.get_config(
+        "theme",
+        current_user=SimpleNamespace(name="alice"),
+    )
+
+    assert response.success is True
+    assert response.data == {"value": "dark"}
+    service.get.assert_called_once_with(username="alice", key="theme")