code: def testBuffering(self):
      test_filenames = self._createFiles(2, 5, crlf=True)
  
      repeat_dataset = readers.TextLineDataset(
          test_filenames, buffer_size=10
      )
      expected_output = []
      for j in range(2):
          expected_output.extend(
              [self._lineText(j, i) for i in range(5)]
          )
      self.assertDatasetProduces(
          repeat_dataset, expected_output=expected_output
      )
  
imports: import gzip
  import os
  import pathlib
  import zlib
  from absl.testing import parameterized
  from tensorflow.python.data.kernel_tests import checkpoint_test_base
  from tensorflow.python.data.kernel_tests import test_base
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.data.ops import readers
  from tensorflow.python.framework import combinations
  from tensorflow.python.framework import errors
  from tensorflow.python.platform import test
  from tensorflow.python.util import compat
label_desc: Use image node_id 3 for calling the TextLineDatasetTest obj's underlying member method code with example usage: obj.testBuffering() without return types