require File.expand_path('../../test_helper', __FILE__)

require 'mocha/change_state_side_effect'

class ChangeStateSideEffectTest < Mocha::TestCase
  include Mocha

  class FakeState
    attr_reader :active
    attr_writer :description

    def activate
      @active = true
    end

    def mocha_inspect
      @description
    end
  end

  def test_should_activate_the_given_state
    state = FakeState.new
    side_effect = ChangeStateSideEffect.new(state)

    side_effect.perform

    assert state.active
  end

  def test_should_describe_itself_in_terms_of_the_activated_state
    state = FakeState.new
    state.description = 'the-new-state'
    side_effect = ChangeStateSideEffect.new(state)

    assert_equal 'then the-new-state', side_effect.mocha_inspect
  end
end