Update test to skip when optional dependencies are not installed

Author: dagardner-nv

tests/conftest.py

@@ -1125,6 +1125,16 @@ def langchain_community_fixture(fail_missing: bool):
                          fail_missing=fail_missing)
 
 
+@pytest.fixture(name="langchain_openai", scope='session')
+def langchain_community_fixture(fail_missing: bool):
+    """
+    Fixture to ensure langchain_openai is installed
+    """
+    yield import_or_skip("langchain_openai",
+                         reason=OPT_DEP_SKIP_REASON.format(package="langchain_openai"),
+                         fail_missing=fail_missing)
+
+
 @pytest.fixture(name="langchain_nvidia_ai_endpoints", scope='session')
 def langchain_nvidia_ai_endpoints_fixture(fail_missing: bool):
     """

tests/morpheus_llm/llm/conftest.py

@@ -61,6 +61,14 @@ def langchain_community_fixture(langchain_community: types.ModuleType):
     yield langchain_community
 
 
+@pytest.fixture(name="langchain_openai", scope='session', autouse=True)
+def langchain_community_fixture(langchain_openai: types.ModuleType):
+    """
+    Fixture to ensure langchain_openai is installed
+    """
+    yield langchain_openai
+
+
 @pytest.fixture(name="langchain_nvidia_ai_endpoints", scope='session', autouse=True)
 def langchain_nvidia_ai_endpoints_fixture(langchain_nvidia_ai_endpoints: types.ModuleType):
     """

tests/morpheus_llm/llm/test_agents_simple_pipe.py

@@ -127,7 +127,7 @@ def test_agents_simple_pipe_integration_openai(config: Config, questions: list[s
     assert float(response_match.group(1)) >= 3.7
 
 
-@pytest.mark.usefixtures("openai", "restore_environ")
+@pytest.mark.usefixtures("langchain_community", "langchain_openai", "openai", "restore_environ")
 @mock.patch("langchain_community.utilities.serpapi.SerpAPIWrapper.aresults")
 @mock.patch("langchain_openai.OpenAI._agenerate",
             autospec=True)  # autospec is needed as langchain will inspect the function