code: def test_create_required_step_files(tmp_path):
      class TestStep(BaseStepImplemented):
          def __init__(self):  # pylint: disable=super-init-not-called
              pass
  
          @property
          def name(self):
              return "test_step"
  
      def check_required_files(check_exist):
          for required_file in [
              "steps",
              "steps/ingest.py",
              "steps/split.py",
              "steps/train.py",
              "steps/transform.py",
              "steps/custom_metrics.py",
          ]:
              assert (tmp_path / required_file).exists() is check_exist
  
      test_step = TestStep()
      check_required_files(False)
      _get_or_create_execution_directory(
          recipe_root_path=tmp_path,
          recipe_steps=[test_step],
          template="regression/v1",
      )
      check_required_files(True)
  
imports: import os
  import pathlib
  import shutil
  import time
  from unittest import mock
  import pandas
  import pytest
  from mlflow.environment_variables import MLFLOW_RECIPES_EXECUTION_TARGET_STEP_NAME
  from mlflow.recipes import Recipe
  from mlflow.recipes.step import StepStatus
  from mlflow.recipes.steps.ingest import IngestStep
  from mlflow.recipes.steps.split import SplitStep
  from mlflow.recipes.steps.transform import TransformStep
  from mlflow.recipes.utils.execution import _ExecutionPlan, _get_or_create_execution_directory, get_step_output_path, run_recipe_step
  from tests.recipes.helper_functions import BaseStepImplemented
label_desc: Use image node_id 4 for calling a global function with example usage: test_create_required_step_files(tmp_path) and returns: str