code: def test_str(self, corpus):
      cstr = str(corpus)
      assert cstr.startswith("Corpus")
      assert all(
          f"{n}" in cstr for n in [corpus.n_docs, corpus.n_tokens]
      )
  
imports: import collections
  import itertools
  import numpy
  import pytest
  from spacy.tokens import Doc
  from textacy import Corpus
  from textacy import load_spacy_lang
label_desc: Use image node_id 1 for calling the TestCorpusDunder obj's underlying member method code with example usage: obj.test_str(corpus) without return types