text: from torchtext.data import Example, Field
  
  from rnng.actions import NT, REDUCE, SHIFT, get_nonterm, is_nt
  from rnng.example import make_example
  from rnng.oracle import Oracle
  
  
  def test_make_example_from_disc_oracle():
      actions = [
          NT('S'),
          NT('NP'),
          SHIFT,
          REDUCE,
          NT('VP'),
          SHIFT,
          NT('NP'),
          SHIFT,
          REDUCE,
          REDUCE,
          REDUCE,
      ]
      pos_tags = 'NNP VBZ NNP'.split()
      words = 'John loves Mary'.split()
      oracle = Oracle(actions, pos_tags, words)
      fields = [
          ('actions', Field()),
          ('nonterms', Field()),
          ('pos_tags', Field()),
          ('words', Field()),
      ]
  
      example = make_example(oracle, fields)
  
      assert isinstance(example, Example)
      assert example.actions == actions
      assert example.nonterms == [get_nonterm(a) for a in actions if is_nt(a)]
      assert example.pos_tags == pos_tags
      assert example.words == words
  