new_contents: # -*- coding: utf-8 -*-
  
  
  def test_config(testdir):
      """Make sure that pytest accepts the `cookies` fixture."""
  
      # create a temporary pytest test module
      testdir.makepyfile("""
          import json
  
  
          def test_user_dir(tmpdir_factory, _config_file):
              basetemp = tmpdir_factory.getbasetemp()
  
              assert _config_file.basename == 'config'
  
              user_dir = _config_file.dirpath()
              assert user_dir.fnmatch('user_dir?')
  
              assert user_dir.dirpath() == basetemp
  
  
          def test_valid_cookiecutter_config(_config_file):
              config_text = _config_file.read()
              config = json.loads(config_text)
  
              user_dir = _config_file.dirpath()
  
              expected = {
                  'cookiecutters_dir': str(user_dir.join('cookiecutters')),
                  'replay_dir': str(user_dir.join('cookiecutter_replay')),
                  'default_context': {}
              }
              assert config == expected
      """)
  
      # run pytest with the following cmd args
      result = testdir.runpytest('-vv')
  
      # fnmatch_lines does an assertion internally
      result.stdout.fnmatch_lines([
          '*::test_user_dir PASSED',
          '*::test_valid_cookiecutter_config PASSED',
      ])
  
      # make sure that that we get a '0' exit code for the testsuite
      assert result.ret == 0
  
subject: Implement tests for a new _config_file fixture