make qa_engineer, enable writetest and runcode

tests/metagpt/actions/test_write_test.py

@@ -8,19 +8,35 @@
 import pytest
 
 from metagpt.actions.write_test import WriteTest
+from metagpt.logs import logger
 
 
 @pytest.mark.asyncio
 async def test_write_test():
     code = """
-    def add(a, b):
-        return a + b
+    import random
+    from typing import Tuple
+
+    class Food:
+        def __init__(self, position: Tuple[int, int]):
+            self.position = position
+
+        def generate(self, max_y: int, max_x: int):
+            self.position = (random.randint(1, max_y - 1), random.randint(1, max_x - 1))
     """
 
-    write_test = WriteTest("write_test")
+    write_test = WriteTest()
 
-    test_cases = await write_test.run(code)
+    test_code = await write_test.run(
+        code_to_test=code,
+        test_file_name="test_food.py",
+        source_file_path="/some/dummy/path/cli_snake_game/cli_snake_game/food.py",
+        workspace="/some/dummy/path/cli_snake_game"
+    )
+    logger.info(test_code)
 
     # We cannot exactly predict the generated test cases, but we can check if it is a string and if it is not empty
-    assert isinstance(test_cases, str)
-    assert len(test_cases) > 0
+    assert isinstance(test_code, str)
+    assert "from cli_snake_game.food import Food" in test_code
+    assert "class TestFood(unittest.TestCase)" in test_code
+    assert "def test_generate" in test_code