Patch pipeline factory in test setup and teardown

Replaces direct assignment of the pipeline factory in tearDown with a patch in setUp and proper cleanup in tearDown. This ensures test isolation and avoids interference between tests by consistently patching and unpatching the factory.

Author: mabashian

ansible_ai_connect/main/tests/test_utils.py

@@ -23,6 +23,8 @@
 # )
 # from ansible_ai_connect.test_utils import WisdomServiceLogAwareTestCase
 
+from unittest.mock import patch
+
 from django.apps import apps
 from django.test import override_settings
 
@@ -34,10 +36,16 @@
 
 @override_settings(ANSIBLE_AI_MODEL_MESH_CONFIG=mock_config("wca"))
 class TestHasWCAProvidersWithWCAProvider(WisdomServiceLogAwareTestCase):
+    def setUp(self):
+        super().setUp()
+        # Patch the pipeline factory to avoid test interference
+        self.pipeline_factory_patcher = patch.object(
+            apps.get_app_config("ai"), "_pipeline_factory", ModelPipelineFactory()
+        )
+        self.pipeline_factory_patcher.start()
+
     def tearDown(self):
-        """Reset pipeline factory to avoid test interference."""
-        # Force recreation of the factory with current configuration
-        apps.get_app_config("ai")._pipeline_factory = ModelPipelineFactory()
+        self.pipeline_factory_patcher.stop()
         super().tearDown()
 
     def test_returns_true_with_wca_provider(self):