code: def test_suite():
      return unittest.TestLoader().loadTestsFromName(__name__)
  
imports: import unittest
  from collections import deque
  import psycopg2
  from psycopg2 import extensions
  from psycopg2.extensions import Notify
  from .testutils import ConnectingTestCase, skip_if_crdb, slow
  from .testconfig import dsn
  import sys
  import time
  import select
  from subprocess import Popen, PIPE
label_desc: Use image node_id 1 for calling a global function with example usage: test_suite() and returns: unittest