code: def test_default(self, doc_en):
      result = list(extract.noun_chunks(doc_en))
      assert all(isinstance(span, Span) for span in result)
  
imports: import collections
  import pytest
  from spacy.tokens import Span, Token
  from textacy import extract
  from textacy.extract import basics
label_desc: Use image node_id 1 for calling the TestNounChunks obj's underlying member method code with example usage: obj.test_default(doc_en) without return types