code: def test_register_validate_input(client, username, password, message):
      response = client.post(
          "/auth/register",
          data={"username": username, "password": password},
      )
      assert message in response.text
  
file_path: flask-sqlalchemy/examples/flaskr/tests/test_auth.py
imports: import pytest
  from flask import g
  from flask import session
  from flaskr import db
  from flaskr.auth.models import User
label_desc: Use image node_id 3 for calling a global function with example usage: test_register_validate_input(client, username, password, message) without return types