code: def test_app():
      response = client.get("/info")
      data = response.json()
      assert data == {
          "app_name": "Awesome API",
          "admin_email": "testing_admin@example.com",
          "items_per_user": 50,
      }
  
imports: from fastapi.testclient import TestClient
  from .config import Settings
  from .main import app, get_settings
label_desc: Use image node_id 2 for calling a global function with example usage: test_app() without return types