add test config

tests/metagpt/test_config.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""
+@Time    : 2024/1/9 15:57
+@Author  : alexanderwu
+@File    : test_config.py
+"""
+
+from metagpt.config2 import Config, config
+from metagpt.configs.llm_config import LLMType
+
+
+def test_config_1():
+    cfg = Config.default()
+    llm = cfg.get_openai_llm()
+    assert llm is not None
+    assert llm.api_type == LLMType.OPENAI
+
+
+def test_config_2():
+    assert config == Config.default()