Add tests for some LLM provider endpoints + small logic change to ensure that display_model_names is not empty

backend/onyx/server/manage/llm/api.py

@@ -142,19 +142,20 @@ def put_llm_provider(
             detail=f"LLM Provider with name {llm_provider.name} already exists",
         )
 
-    # Ensure default_model_name and fast_default_model_name are in display_model_names
-    # This is necessary for custom models and Bedrock/Azure models
-    if llm_provider.display_model_names is None:
-        llm_provider.display_model_names = []
+    if llm_provider.display_model_names is not None:
+        # Ensure default_model_name and fast_default_model_name are in display_model_names
+        # This is necessary for custom models and Bedrock/Azure models
+        if llm_provider.default_model_name not in llm_provider.display_model_names:
+            llm_provider.display_model_names.append(llm_provider.default_model_name)
 
-    if llm_provider.default_model_name not in llm_provider.display_model_names:
-        llm_provider.display_model_names.append(llm_provider.default_model_name)
-
-    if (
-        llm_provider.fast_default_model_name
-        and llm_provider.fast_default_model_name not in llm_provider.display_model_names
-    ):
-        llm_provider.display_model_names.append(llm_provider.fast_default_model_name)
+        if (
+            llm_provider.fast_default_model_name
+            and llm_provider.fast_default_model_name
+            not in llm_provider.display_model_names
+        ):
+            llm_provider.display_model_names.append(
+                llm_provider.fast_default_model_name
+            )
 
     try:
         return upsert_llm_provider(

backend/tests/integration/conftest.py

@@ -4,8 +4,12 @@ from collections.abc import Generator
 import pytest
 from sqlalchemy.orm import Session
 
+from onyx.auth.schemas import UserRole
 from onyx.db.engine import get_session_context_manager
 from onyx.db.search_settings import get_current_search_settings
+from tests.integration.common_utils.constants import GENERAL_HEADERS
+from tests.integration.common_utils.managers.user import build_email
+from tests.integration.common_utils.managers.user import DEFAULT_PASSWORD
 from tests.integration.common_utils.managers.user import UserManager
 from tests.integration.common_utils.reset import reset_all
 from tests.integration.common_utils.reset import reset_all_multitenant
@@ -57,6 +61,30 @@ def new_admin_user(reset: None) -> DATestUser | None:
         return None
 
 
+@pytest.fixture
+def admin_user() -> DATestUser | None:
+    try:
+        return UserManager.create(name="admin_user")
+    except Exception:
+        pass
+
+    try:
+        return UserManager.login_as_user(
+            DATestUser(
+                id="",
+                email=build_email("admin_user"),
+                password=DEFAULT_PASSWORD,
+                headers=GENERAL_HEADERS,
+                role=UserRole.ADMIN,
+                is_active=True,
+            )
+        )
+    except Exception:
+        pass
+
+    return None
+
+
 @pytest.fixture
 def reset_multitenant() -> None:
     reset_all_multitenant()

backend/tests/integration/openai_assistants_api/conftest.py

@@ -7,40 +7,12 @@ import requests
 from tests.integration.common_utils.constants import API_SERVER_URL
 from tests.integration.common_utils.constants import GENERAL_HEADERS
 from tests.integration.common_utils.managers.llm_provider import LLMProviderManager
-from tests.integration.common_utils.managers.user import build_email
-from tests.integration.common_utils.managers.user import DEFAULT_PASSWORD
-from tests.integration.common_utils.managers.user import UserManager
-from tests.integration.common_utils.managers.user import UserRole
 from tests.integration.common_utils.test_models import DATestLLMProvider
 from tests.integration.common_utils.test_models import DATestUser
 
 BASE_URL = f"{API_SERVER_URL}/openai-assistants"
 
 
-@pytest.fixture
-def admin_user() -> DATestUser | None:
-    try:
-        return UserManager.create("admin_user")
-    except Exception:
-        pass
-
-    try:
-        return UserManager.login_as_user(
-            DATestUser(
-                id="",
-                email=build_email("admin_user"),
-                password=DEFAULT_PASSWORD,
-                headers=GENERAL_HEADERS,
-                role=UserRole.ADMIN,
-                is_active=True,
-            )
-        )
-    except Exception:
-        pass
-
-    return None
-
-
 @pytest.fixture
 def llm_provider(admin_user: DATestUser | None) -> DATestLLMProvider:
     return LLMProviderManager.create(user_performing_action=admin_user)

backend/tests/integration/tests/llm_provider/test_llm_provider.py

@@ -0,0 +1,120 @@
+import uuid
+
+import requests
+
+from tests.integration.common_utils.constants import API_SERVER_URL
+from tests.integration.common_utils.test_models import DATestUser
+
+
+_DEFAULT_MODELS = ["gpt-4", "gpt-4o"]
+
+
+def _get_provider_by_id(admin_user: DATestUser, provider_id: str) -> dict | None:
+    """Utility function to fetch an LLM provider by ID"""
+    response = requests.get(
+        f"{API_SERVER_URL}/admin/llm/provider",
+        headers=admin_user.headers,
+    )
+    assert response.status_code == 200
+    providers = response.json()
+    return next((p for p in providers if p["id"] == provider_id), None)
+
+
+def test_create_llm_provider_without_display_model_names(
+    admin_user: DATestUser,
+) -> None:
+    """Test creating an LLM provider without specifying
+    display_model_names and verify it's null in response"""
+    # Create LLM provider without model_names
+    response = requests.put(
+        f"{API_SERVER_URL}/admin/llm/provider",
+        headers=admin_user.headers,
+        json={
+            "name": str(uuid.uuid4()),
+            "provider": "openai",
+            "default_model_name": _DEFAULT_MODELS[0],
+            "model_names": _DEFAULT_MODELS,
+            "is_public": True,
+            "groups": [],
+        },
+    )
+    assert response.status_code == 200
+    created_provider = response.json()
+    provider_data = _get_provider_by_id(admin_user, created_provider["id"])
+
+    # Verify model_names is None/null
+    assert provider_data is not None
+    assert provider_data["model_names"] == _DEFAULT_MODELS
+    assert provider_data["default_model_name"] == _DEFAULT_MODELS[0]
+    assert provider_data["display_model_names"] is None
+
+
+def test_update_llm_provider_model_names(admin_user: DATestUser) -> None:
+    """Test updating an LLM provider's model_names"""
+    # First create provider without model_names
+    name = str(uuid.uuid4())
+    response = requests.put(
+        f"{API_SERVER_URL}/admin/llm/provider",
+        headers=admin_user.headers,
+        json={
+            "name": name,
+            "provider": "openai",
+            "default_model_name": _DEFAULT_MODELS[0],
+            "model_names": [_DEFAULT_MODELS[0]],
+            "is_public": True,
+            "groups": [],
+        },
+    )
+    assert response.status_code == 200
+    created_provider = response.json()
+
+    # Update with model_names
+    response = requests.put(
+        f"{API_SERVER_URL}/admin/llm/provider",
+        headers=admin_user.headers,
+        json={
+            "id": created_provider["id"],
+            "name": name,
+            "provider": created_provider["provider"],
+            "default_model_name": _DEFAULT_MODELS[0],
+            "model_names": _DEFAULT_MODELS,
+            "is_public": True,
+            "groups": [],
+        },
+    )
+    assert response.status_code == 200
+
+    # Verify update
+    provider_data = _get_provider_by_id(admin_user, created_provider["id"])
+    assert provider_data is not None
+    assert provider_data["model_names"] == _DEFAULT_MODELS
+
+
+def test_delete_llm_provider(admin_user: DATestUser) -> None:
+    """Test deleting an LLM provider"""
+    # Create a provider
+    response = requests.put(
+        f"{API_SERVER_URL}/admin/llm/provider",
+        headers=admin_user.headers,
+        json={
+            "name": "test-provider-delete",
+            "provider": "openai",
+            "default_model_name": _DEFAULT_MODELS[0],
+            "model_names": _DEFAULT_MODELS,
+            "is_public": True,
+            "groups": [],
+        },
+    )
+    assert response.status_code == 200
+    created_provider = response.json()
+
+    # Delete the provider
+    response = requests.delete(
+        f"{API_SERVER_URL}/admin/llm/provider/{created_provider['id']}",
+        headers=admin_user.headers,
+    )
+    assert response.status_code == 200
+
+    # Verify provider is deleted by checking it's not in the list
+    provider_data = _get_provider_by_id(admin_user, created_provider["id"])
+    assert provider_data is None