test(test_internal_user_endpoints.py): add unit testing to handle user_email=None

tests/litellm/proxy/management_endpoints/test_internal_user_endpoints.py

@@ -0,0 +1,57 @@
+import json
+import os
+import sys
+
+import pytest
+from fastapi.testclient import TestClient
+
+sys.path.insert(
+    0, os.path.abspath("../../../..")
+)  # Adds the parent directory to the system path
+
+from litellm.proxy._types import LiteLLM_UserTableFiltered, UserAPIKeyAuth
+from litellm.proxy.management_endpoints.internal_user_endpoints import ui_view_users
+from litellm.proxy.proxy_server import app
+
+client = TestClient(app)
+
+
+@pytest.mark.asyncio
+async def test_ui_view_users_with_null_email(mocker, caplog):
+    """
+    Test that /user/filter/ui endpoint returns users even when they have null email fields
+    """
+    # Mock the prisma client
+    mock_prisma_client = mocker.MagicMock()
+
+    # Create mock user data with null email
+    mock_user = mocker.MagicMock()
+    mock_user.model_dump.return_value = {
+        "user_id": "test-user-null-email",
+        "user_email": None,
+        "user_role": "proxy_admin",
+        "created_at": "2024-01-01T00:00:00Z",
+    }
+
+    # Setup the mock find_many response
+    # Setup the mock find_many response as an async function
+    async def mock_find_many(*args, **kwargs):
+        return [mock_user]
+
+    mock_prisma_client.db.litellm_usertable.find_many = mock_find_many
+
+    # Patch the prisma client import in the endpoint
+    mocker.patch("litellm.proxy.proxy_server.prisma_client", mock_prisma_client)
+
+    # Call ui_view_users function directly
+    response = await ui_view_users(
+        user_api_key_dict=UserAPIKeyAuth(user_id="test_user"),
+        user_id="test_user",
+        user_email=None,
+        page=1,
+        page_size=50,
+    )
+
+    assert response == [
+        LiteLLM_UserTableFiltered(user_id="test-user-null-email", user_email=None)
+    ]