code: def test_whitespace_nlp_with_sentences_singleton(self):
      raw = "Blah"
      self.assertEqual(whitespace_nlp_with_sentences(raw).text, raw)
      self.assertEqual(len(whitespace_nlp_with_sentences(raw).sents), 1)
      self.assertEqual(
          len(whitespace_nlp_with_sentences(raw).sents[0]), 1
      )
  
      raw = "Blah."
      self.assertEqual(whitespace_nlp_with_sentences(raw).text, raw)
      self.assertEqual(len(whitespace_nlp_with_sentences(raw).sents), 1)
      self.assertEqual(
          len(whitespace_nlp_with_sentences(raw).sents[0]), 2
      )
  
imports: from unittest import TestCase
  from scattertext.WhitespaceNLP import whitespace_nlp_with_sentences, whitespace_nlp, Tok, Doc
label_desc: Use image node_id 3 for calling the TestWhitespaceNLP obj's underlying member method code with example usage: obj.test_whitespace_nlp_with_sentences_singleton() without return types