refactor: update tests to use async mocks and improve readability

tests/unit/test_config_e2e.py

@@ -1,13 +1,16 @@
 """End-to-end test for configuration management system."""
 
-from unittest.mock import MagicMock, Mock, patch
+from unittest.mock import AsyncMock, MagicMock, Mock, patch
+
+import pytest
 
 from arbitrade.config.service import ConfigurationService
 from arbitrade.config.settings import Settings
 from arbitrade.storage.repositories import AuditRepository
 
 
-def test_end_to_end_config_workflow():
+@pytest.mark.asyncio
+async def test_end_to_end_config_workflow():
     """Test complete configuration workflow."""
     # Create mocks
     settings = Mock(spec=Settings)
@@ -36,13 +39,14 @@ def test_end_to_end_config_workflow():
         # Mock the setting creation
         mock_created_setting = Mock()
         mock_created_setting.updated_at = "2023-01-01T00:00:00"
-        mock_repo_instance.create_setting.return_value = mock_created_setting
-        mock_repo_instance.get_setting.return_value = None
-        mock_repo_instance.get_latest_updated_at.return_value = None
-        mock_repo_instance.list_settings.return_value = []
+        mock_repo_instance.create_setting = AsyncMock(
+            return_value=mock_created_setting)
+        mock_repo_instance.get_setting = AsyncMock(return_value=None)
+        mock_repo_instance.get_latest_updated_at = AsyncMock(return_value=None)
+        mock_repo_instance.list_settings = AsyncMock(return_value=[])
 
         # Set a setting
-        service.set_setting("test_key", "test_value", "test_user")
+        await service.set_setting("test_key", "test_value", "test_user")
 
         # Verify setting was retrieved
         result = service.get_setting("test_key", "default")