code: def test_search(self):
      self.assertEqual(len(self.corpus.search("bigram")), 1)
      df = self.corpus.search("bigram")
      d = dict(df.iloc[0])
      self.assertEqual(d["category"], "???")
      self.assertEqual(d["document_lengths"], 44)
      self.assertEqual(
          str(d["parsed"]),
          "speak up, speak up, this is a repeat bigram.",
      )
      self.assertEqual(len(self.corpus.search("the")), 2)
  
file_path: scattertext/scattertext/test/test_ParsedCorpus.py
imports: from unittest import TestCase
  import pandas
  from scattertext import whitespace_nlp, CorpusFromParsedDocuments
  from scattertext.test.test_corpusFromPandas import get_docs_categories
label_desc: Use image node_id 6 for calling the TestParsedCorpus obj's underlying member method code with example usage: obj.test_search() without return types