code: def test_root_token_jessica(client: TestClient):
      response = client.get("/?token=jessica")
      assert response.status_code == 200
      assert response.json() == {
          "message": "Hello Bigger Applications!"
      }
  
imports: import pytest
  from dirty_equals import IsDict
  from fastapi.testclient import TestClient
  from fastapi.utils import match_pydantic_error_url
  from ...utils import needs_py39
label_desc: Use image node_id 18 for calling a global function with example usage: test_root_token_jessica(client) without return types