code: def test_mock_distribute(tmp_path):
      def process_fn():
          assert "KERASTUNER_ORACLE_IP" in os.environ
          # Wait, to test that other threads aren't overriding env vars.
          time.sleep(1)
          assert isinstance(os.environ, mock_distribute.MockEnvVars)
          tuner_id = os.environ["KERASTUNER_TUNER_ID"]
          if "worker" in tuner_id:
              # Give the chief process time to write its value,
              # as we do not join on the chief since it will run
              # a server.
              time.sleep(2)
          fname = os.path.join(str(tmp_path), tuner_id)
          with open(fname, "w") as f:
              f.write(tuner_id)
  
      mock_distribute.mock_distribute(process_fn, num_workers=3)
  
      for tuner_id in {"chief", "worker0", "worker1", "worker2"}:
          fname = os.path.join(str(tmp_path), tuner_id)
          with open(fname, "r") as f:
              assert f.read() == tuner_id
  
imports: import os
  import time
  import pytest
  from keras_tuner.test_utils import mock_distribute
label_desc: Use image node_id 1 for calling a global function with example usage: test_mock_distribute(tmp_path) without return types