code: def _assertInfraValidatorPassed(self):
      blessing = self._get_latest_output_artifact(
          "InfraValidator", "blessing"
      )
      self._assertFileExists(
          os.path.join(blessing.uri, "INFRA_BLESSED")
      )
  
imports: import os
  import subprocess
  from absl.testing import parameterized
  import tensorflow
  from tfx.dsl.io import fileio
  from tfx.examples.penguin import penguin_pipeline_local_infraval
  from tfx.orchestration import metadata
  from tfx.orchestration.local.local_dag_runner import LocalDagRunner
  from tfx.utils import path_utils
  from ml_metadata.proto import metadata_store_pb2
label_desc: Use image node_id 5 for calling the PenguinPipelineLocalInfravalEndToEndTest obj's underlying member method code with example usage: obj._assertInfraValidatorPassed() without return types