test: isolate cow cli plugin import

plugins/cow_cli/cow_cli.py

@@ -428,7 +428,7 @@ class CowCliPlugin(Plugin):
 
     @staticmethod
     def _resolve_bot_type_for_model(model_name: str) -> str:
-        """Resolve bot_type from model name, reusing AgentBridge mapping."""
+        """Resolve bot_type from model name, matching AgentBridge mapping."""
         from common import const
         _EXACT = {
             "wenxin": const.BAIDU, "wenxin-4": const.BAIDU,

tests/test_qianfan_provider.py

@@ -57,6 +57,14 @@ class TestQianfanConstantsAndRouting(unittest.TestCase):
         import plugins
 
         old_plugin_path = plugins.instance.current_plugin_path
+        cow_cli_was_registered = "COW_CLI" in plugins.instance.plugins
+        old_cow_cli_plugin = plugins.instance.plugins.get("COW_CLI")
+        module_names = ("plugins.cow_cli", "plugins.cow_cli.cow_cli")
+        old_modules = {
+            name: sys.modules[name]
+            for name in module_names
+            if name in sys.modules
+        }
         plugins.instance.current_plugin_path = os.path.join(
             os.path.dirname(__file__), "..", "plugins", "cow_cli"
         )
@@ -65,6 +73,15 @@ class TestQianfanConstantsAndRouting(unittest.TestCase):
             cow_cli_plugin = plugins.instance.plugins["COW_CLI"]
         finally:
             plugins.instance.current_plugin_path = old_plugin_path
+            if cow_cli_was_registered:
+                plugins.instance.plugins["COW_CLI"] = old_cow_cli_plugin
+            else:
+                plugins.instance.plugins.pop("COW_CLI", None)
+            for name in module_names:
+                if name in old_modules:
+                    sys.modules[name] = old_modules[name]
+                else:
+                    sys.modules.pop(name, None)
 
         self.assertEqual(
             cow_cli_plugin._resolve_bot_type_for_model("ernie-4.5-turbo-128k"),