code: def test_tokenize(self):
      featurizer = SimpleFeaturizer.from_config(
          SimpleFeaturizer.Config(), FeatureConfig()
      )
      features = featurizer.featurize(
          InputRecord(raw_text=self.sentence)
      )
      expected_tokens = ["order", "me", "a", "coffee"]
      expected_chars = [list(tok) for tok in expected_tokens]
      self.assertListEqual(features.tokens, expected_tokens)
      self.assertListEqual(features.characters, expected_chars)
  
file_path: pytext/pytext/data/test/simple_featurizer_test.py
imports: import unittest
  from pytext.config.field_config import FeatureConfig
  from pytext.data.featurizer import InputRecord, SimpleFeaturizer
label_desc: Use image node_id 2 for calling the SimpleFeaturizerTest obj's underlying member method code with example usage: obj.test_tokenize() without return types