code: def test_delimited_dna_encoder(self):
      original = (
          "TTCGCGGNNN,AACCCAACGC,CATCTATGTA,NNTTGAGTTG,TTGAGTTAAA"
      )
  
      # Encoding should be reversible for any reasonable chunk size.
      for chunk_size in [1, 2, 4, 6, 8]:
          encoder = dna_encoder.DelimitedDNAEncoder(
              chunk_size=chunk_size
          )
          encoded = encoder.encode(original)
          decoded = encoder.decode(encoded)
          self.assertEqual(original, decoded)
  
file_path: tensor2tensor/tensor2tensor/data_generators/dna_encoder_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from tensor2tensor.data_generators import dna_encoder
  import tensorflow.compat.v1
label_desc: Use image node_id 2 for calling the DnaEncoderTest obj's underlying member method code with example usage: obj.test_delimited_dna_encoder() without return types