new_contents: '''
  Test Matcher matches with '*' operator and Boolean flag
  '''
  from __future__ import unicode_literals
  import pytest
  
  from ...matcher import Matcher
  from ...vocab import Vocab
  from ...attrs import LOWER
  from ...tokens import Doc
  
  
  @pytest.mark.xfail
  def test_issue850():
      matcher = Matcher(Vocab())
      IS_ANY_TOKEN = matcher.vocab.add_flag(lambda x: True)
      matcher.add_pattern(
          "FarAway",
          [
              {LOWER: "bob"},
              {'OP': '*', IS_ANY_TOKEN: True},
              {LOWER: 'frank'}
          ])
      doc = Doc(matcher.vocab, words=['bob', 'and', 'and', 'cat', 'frank'])
      match = matcher(doc)
      assert len(match) == 1
      start, end, label, ent_id = match 
      assert start == 0
      assert end == 4
  
subject: Add test for 850: Matcher fails on zero-or-more.