code: def test_deployment_options_default_route(serve_instance):
      @serve.deployment
      class D1:
          pass
  
      serve.run(D1.bind())
  
      routes = requests.get("http://localhost:8000/-/routes").json()
      assert len(routes) == 1
      assert "/" in routes, routes
      assert routes["/"] == SERVE_DEFAULT_APP_NAME
  
file_path: ray/python/ray/serve/tests/test_http_routes.py
imports: import time
  import pytest
  import requests
  from fastapi import FastAPI, Request
  from starlette.responses import RedirectResponse
  import ray
  from ray import serve
  from ray.serve._private.constants import SERVE_DEFAULT_APP_NAME
label_desc: Use image node_id 5 for calling a global function with example usage: test_deployment_options_default_route(serve_instance) without return types