code: def test_whitespace(self, s, exp):
      tokenizer = text_encoder.Tokenizer(alphanum_only=False)
      self.assertEqual(exp, tokenizer.tokenize(s))
      self.assertEqual(s, tokenizer.join(tokenizer.tokenize(s)))
  
imports: from __future__ import unicode_literals
  import os
  from absl.testing import parameterized
  import numpy
  from tensorflow_datasets import testing
  from tensorflow_datasets.core.deprecated.text import text_encoder
label_desc: Use image node_id 3 for calling the TokenizeTest obj's underlying member method code with example usage: obj.test_whitespace(s, exp) without return types