text: import pytest
  from tests.utils import Command
  from thefuck.rules.yarn_command_replaced import match, get_new_command
  
  
  stderr = ('error `install` has been replaced with `add` to add new '
            'dependencies. Run "yarn add {}" instead.').format
  
  
  @pytest.mark.parametrize('command', [
      Command(script='yarn install redux', stderr=stderr('redux')),
      Command(script='yarn install moment', stderr=stderr('moment')),
      Command(script='yarn install lodash', stderr=stderr('lodash'))])
  def test_match(command):
      assert match(command)
  
  
  @pytest.mark.parametrize('command', [
      Command('yarn install')])
  def test_not_match(command):
      assert not match(command)
  
  
  @pytest.mark.parametrize('command, new_command', [
      (Command('yarn install redux', stderr=stderr('redux')),
       'yarn add redux'),
      (Command('yarn install moment', stderr=stderr('moment')),
       'yarn add moment'),
      (Command('yarn install lodash', stderr=stderr('lodash')),
       'yarn add lodash')])
  def test_get_new_command(command, new_command):
      assert get_new_command(command) == new_command
  