code: def test_n_less_than_1(self, doc_en):
      with pytest.raises(ValueError):
          _ = list(extract.ngrams(doc_en, 0))
  
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 3 for calling the TestNGrams obj's underlying member method code with example usage: obj.test_n_less_than_1(doc_en) without return types