LCORE-1360: Integration tests for /root endpoint

Author: tisnik

tests/integration/endpoints/test_root_endpoint.py

@@ -0,0 +1,71 @@
+"""Integration tests for the /root endpoint."""
+
+from typing import Generator, Any
+import pytest
+from pytest_mock import MockerFixture
+
+from fastapi import Request, status
+from llama_stack_client.types import VersionInfo
+from authentication.interface import AuthTuple
+
+from configuration import AppConfig
+from app.endpoints.root import root_endpoint_handler
+
+
+@pytest.fixture(name="mock_llama_stack_client")
+def mock_llama_stack_client_fixture(
+    mocker: MockerFixture,
+) -> Generator[Any, None, None]:
+    """Mock only the external Llama Stack client.
+
+    This is the only external dependency we mock for integration tests,
+    as it represents an external service call.
+
+    Parameters:
+        mocker (pytest_mock.MockerFixture): The pytest-mock fixture used to apply the patch.
+
+    Yields:
+        AsyncMock: A mocked Llama Stack client configured for tests.
+    """
+    mock_holder_class = mocker.patch("app.endpoints.info.AsyncLlamaStackClientHolder")
+
+    mock_client = mocker.AsyncMock()
+    # Mock the version endpoint to return a known version
+    mock_client.inspect.version.return_value = VersionInfo(version="0.2.22")
+
+    # Create a mock holder instance
+    mock_holder_instance = mock_holder_class.return_value
+    mock_holder_instance.get_client.return_value = mock_client
+
+    yield mock_client
+
+
+@pytest.mark.asyncio
+async def test_root_endpoint(
+    test_config: AppConfig,
+    test_request: Request,
+    test_auth: AuthTuple,
+) -> None:
+    """Test that Root endpoint returns index HTML page.
+
+    This integration test verifies:
+    - Endpoint handler
+    - No authentication is used
+    - Response structure matches expected format
+
+    Parameters:
+        test_config (AppConfig): Loads root configuration
+        test_request (Request): FastAPI request
+        test_auth (AuthTuple): noop authentication tuple
+    """
+    # Fixtures with side effects (needed but not directly used)
+    _ = test_config
+
+    response = await root_endpoint_handler(auth=test_auth, request=test_request)
+
+    assert response.media_type == "text/html"
+    assert response.status_code == status.HTTP_200_OK
+    # retrieve response body as a string
+    body = response.body.decode("utf-8")
+    assert "<title>Lightspeed core service</title>" in body
+    assert "<h1>Lightspeed core service</h1>" in body