code: def test_connect(self, corenlp_client):
      corenlp_client.ensure_alive()
      assert corenlp_client.is_active
      assert corenlp_client.is_alive()
  
imports: from http.server import BaseHTTPRequestHandler, HTTPServer
  import multiprocessing
  import pytest
  import requests
  import stanza.server
  import stanza.server.client
  import shlex
  import subprocess
  import time
  from stanza.models.constituency import tree_reader
  from stanza.tests import *
label_desc: Use image node_id 2 for calling the TestCoreNLPClient obj's underlying member method code with example usage: obj.test_connect(corenlp_client) without return types