add residue code

tests/metagpt/environment/api/__init__.py

@@ -0,0 +1,3 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# @Desc   :

tests/metagpt/environment/gym_env/__init__.py

@@ -0,0 +1,3 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# @Desc   :

tests/metagpt/environment/software_env/__init__.py

@@ -0,0 +1,3 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# @Desc   :

tests/metagpt/environment/test_base_env.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# @Desc   : the unittest of ExtEnv&Env
+
+import pytest
+
+from metagpt.environment.base_env import Env, mark_as_writeable, mark_as_readable
+from metagpt.environment.api.env_api import EnvAPIAbstract
+
+
+class ForTestEnv(Env):
+    value: int = 0
+
+    @mark_as_readable
+    def read_api_no_parms(self):
+        return self.value
+
+    @mark_as_readable
+    def read_api(self, a: int, b: int):
+        return a + b
+
+    @mark_as_writeable
+    def write_api(self, a: int, b: int):
+        self.value = a + b
+
+
+def test_ext_env():
+    env = ForTestEnv()
+    assert len(env.read_api_registry) == 2
+    assert len(env.write_api_registry) == 1
+
+    assert env.step(EnvAPIAbstract(api_name="write_api", kwargs={"a": 5, "b": 10})) == 15
+    with pytest.raises(ValueError):
+        env.observe("not_exist_api")
+
+    assert env.observe("read_api_no_parms") == 15
+    assert env.observe(EnvAPIAbstract(api_name="read_api", kwargs={"a": 5, "b": 5})) == 10

tests/metagpt/environment/werewolf_env/__init__.py

@@ -0,0 +1,3 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# @Desc   :