code: def test_vectors(self, corpus):
      vectors = corpus.vectors
      assert isinstance(vectors, np.ndarray)
      assert len(vectors.shape) == 2
      assert vectors.shape[0] == len(corpus)
  
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 TestCorpusProperties obj's underlying member method code with example usage: obj.test_vectors(corpus) without return types