Update: improve the unit testing of tutorial assistants and OCR assistants.

tests/metagpt/roles/test_tutorial_assistant.py

@@ -5,19 +5,27 @@
 @Author  : Stitch-z
 @File    : test_tutorial_assistant.py
 """
+import shutil
 import aiofiles
 import pytest
 
+from metagpt.const import TUTORIAL_PATH
 from metagpt.roles.tutorial_assistant import TutorialAssistant
 
 
 @pytest.mark.asyncio
 @pytest.mark.parametrize(("language", "topic"), [("Chinese", "Write a tutorial about pip")])
 async def test_tutorial_assistant(language: str, topic: str):
+    shutil.rmtree(path=TUTORIAL_PATH, ignore_errors=True)
+
     role = TutorialAssistant(language=language)
     msg = await role.run(topic)
+    assert TUTORIAL_PATH.exists()
     filename = msg.content
     async with aiofiles.open(filename, mode="r", encoding="utf-8") as reader:
         content = await reader.read()
-        assert content
+        assert "pip" in content
 
+
+if __name__ == "__main__":
+    pytest.main([__file__, "-s"])