fix bugs

metagpt/tools/search_engine.py

@@ -42,7 +42,7 @@ class SearchEngine:
 
     def __init__(
         self,
-        engine: Optional[SearchEngineType] = None,
+        engine: Optional[SearchEngineType] = SearchEngineType.SERPER_GOOGLE,
         run_func: Callable[[str, int, bool], Coroutine[None, None, Union[str, list[str]]]] = None,
     ):
         if engine == SearchEngineType.SERPAPI_GOOGLE:

metagpt/tools/ut_writer.py

@@ -4,6 +4,7 @@
 import json
 from pathlib import Path
 
+from metagpt.config2 import config
 from metagpt.provider.openai_api import OpenAILLM as GPTAPI
 from metagpt.utils.common import awrite
 
@@ -281,6 +282,6 @@ class UTGenerator:
         """Choose based on different calling methods"""
         result = ""
         if self.chatgpt_method == "API":
-            result = await GPTAPI().aask_code(messages=messages)
+            result = await GPTAPI(config.get_llm_config()).aask_code(messages=messages)
 
         return result

metagpt/tools/web_browser_engine.py

@@ -15,7 +15,7 @@ from metagpt.utils.parse_html import WebPage
 class WebBrowserEngine:
     def __init__(
         self,
-        engine: WebBrowserEngineType | None = None,
+        engine: WebBrowserEngineType | None = WebBrowserEngineType.PLAYWRIGHT,
         run_func: Callable[..., Coroutine[Any, Any, WebPage | list[WebPage]]] | None = None,
     ):
         if engine is None: