code: def test_suite():
      return unittest.TestLoader().loadTestsFromName(__name__)
  
imports: import gc
  import time
  import unittest
  import warnings
  import psycopg2
  import psycopg2.errors
  from psycopg2 import extensions
  from .testutils import ConnectingTestCase, StringIO, skip_before_postgres, skip_if_crdb, crdb_version, slow
label_desc: Use image node_id 1 for calling a global function with example usage: test_suite() and returns: unittest