code: def testImporterDriver(self, reimport: bool):
      with metadata.Metadata(
          connection_config=self.connection_config
      ) as m:
          m.publish_artifacts(self.existing_artifacts)
          driver = importer.ImporterDriver(metadata_handle=m)
          execution_result = driver.pre_execution(
              component_info=self.component_info,
              pipeline_info=self.pipeline_info,
              driver_args=self.driver_args,
              input_dict={},
              output_dict=self.output_dict,
              exec_properties={
                  importer.SOURCE_URI_KEY: self.source_uri,
                  importer.REIMPORT_OPTION_KEY: int(reimport),
                  importer.OUTPUT_KEY_KEY: importer.IMPORT_RESULT_KEY,
              },
          )
          self.assertFalse(execution_result.use_cached_results)
          self.assertEmpty(execution_result.input_dict)
          result_artifacts = execution_result.output_dict[
              execution_result.exec_properties[importer.OUTPUT_KEY_KEY]
          ]
          self.assertLen(result_artifacts, 1)
          result = result_artifacts[0]
          self.assertEqual(result.uri, self.source_uri)
          self.assertTrue(result.is_external)
          self.assertEqual(
              self.properties,
              data_types_utils.build_value_dict(
                  result.mlmd_artifact.properties
              ),
          )
          expected_custom_properties = {
              **self.custom_properties,
              "is_external": 1,
          }
          self.assertEqual(
              expected_custom_properties,
              data_types_utils.build_value_dict(
                  result.mlmd_artifact.custom_properties
              ),
          )
  
imports: from absl.testing import parameterized
  import tensorflow
  from tfx import types
  from tfx.dsl.components.common import importer
  from tfx.orchestration import data_types
  from tfx.orchestration import data_types_utils
  from tfx.orchestration import metadata
  from tfx.types import artifact_utils
  from tfx.types import standard_artifacts
  from tfx.utils import json_utils
  from ml_metadata.proto import metadata_store_pb2
label_desc: Use image node_id 2 for calling the ImporterDriverTest obj's underlying member method code with example usage: obj.testImporterDriver(reimport) without return types