code: def test_pipeline_create_and_update_without_role_arn(
      sagemaker_session_mock,
  ):
      mock_session = copy.deepcopy(sagemaker_session_mock)
      mock_session.sagemaker_config = {}
      pipeline = Pipeline(
          name="MyPipeline",
          parameters=[],
          steps=[],
          sagemaker_session=mock_session,
      )
      with pytest.raises(ValueError):
          pipeline.create()
      with pytest.raises(ValueError):
          pipeline.update()
      with pytest.raises(ValueError):
          pipeline.upsert()
  
imports: from __future__ import absolute_import
  import copy
  import json
  import pytest
  from mock import Mock, call, patch
  from sagemaker import s3
  from sagemaker.remote_function.job import _JobSettings
  from sagemaker.session_settings import SessionSettings
  from sagemaker.workflow.condition_step import ConditionStep
  from sagemaker.workflow.conditions import ConditionEquals
  from sagemaker.workflow.execution_variables import ExecutionVariables
  from sagemaker.workflow.function_step import DelayedReturn, step
  from sagemaker.workflow.functions import JsonGet, Join
  from sagemaker.workflow.parameters import ParameterString
  from sagemaker.workflow.pipeline import Pipeline, PipelineGraph, _replace_pipeline_name_in_json_get_s3_uri
  from sagemaker.workflow.pipeline_context import _PipelineConfig
  from sagemaker.workflow.pipeline_definition_config import PipelineDefinitionConfig
  from sagemaker.workflow.pipeline_experiment_config import PipelineExperimentConfig, PipelineExperimentConfigProperties
  from sagemaker.workflow.step_collections import StepCollection
  from tests.unit.sagemaker.workflow.helpers import ordered, CustomStep, CustomFunctionStep
  from sagemaker.local.local_session import LocalSession
  from botocore.exceptions import ClientError
  from sagemaker.workflow.selective_execution_config import SelectiveExecutionConfig
label_desc: Use image node_id 2 for calling a global function with example usage: test_pipeline_create_and_update_without_role_arn(sagemaker_session_mock) without return types