code: def test_get_exception():
      response = client.get("/unicorns/yolo")
      assert response.status_code == 418, response.text
      assert response.json() == {
          "message": "Oops! yolo did something. There goes a rainbow..."
      }
  
imports: from fastapi.testclient import TestClient
  from docs_src.handling_errors.tutorial003 import app
label_desc: Use image node_id 2 for calling a global function with example usage: test_get_exception() without return types