code: def client(atm):
      app = create_app(atm)
  
      app.config["TESTING"] = True
      client = app.test_client()
      yield client
  
file_path: ATM/tests/api/test___init__.py
imports: import json
  import os
  import pytest
  from atm.api import create_app
  from atm.core import ATM
  from atm.database import Database
label_desc: Use image node_id 3 for calling a global function with example usage: client(atm) without return types