code: def test_main(self):
      doc_df = pd.DataFrame(
          {
              "Text": [
                  x.strip()
                  for x in """b a m n i b e u p
          b a s a t b e w q n
          b c a g a b e s t a
          b a g h a b e a a t
          b a h a a b e a x a t""".split(
                      "\n"
                  )
              ]
          }
      ).assign(Parse=lambda df: df.Text.apply(whitespace_nlp))
      corpus = CorpusWithoutCategoriesFromParsedDocuments(
          doc_df, parsed_col="Parse"
      ).build()
  
imports: import unittest
  import pandas
  from scattertext.WhitespaceNLP import whitespace_nlp
  from scattertext import CorpusWithoutCategoriesFromParsedDocuments
label_desc: Use image node_id 1 for calling the TestCorpusWithoutCategoriesFromParsedDocuments obj's underlying member method code with example usage: obj.test_main() without return types