code: def test_tar_stream(self):
      self._test_extract(
          TAR_STREAM,
          "arch1.tar",
          {"6pixels.png": self.f1_content, "foo.csv": self.f2_content},
      )
  
imports: import os
  from unittest import mock
  import tensorflow
  from tensorflow_datasets import testing
  from tensorflow_datasets.core.download import extractor
  from tensorflow_datasets.core.download import resource
label_desc: Use image node_id 8 for calling the ExtractorTest obj's underlying member method code with example usage: obj.test_tar_stream() without return types