I18n matchers for rspec 2

i18n_matchers.rb

RSpec::Matchers.define :translate_to do |key, options|
  match do |actual|
    @expected = I18n.t(key, options)
    @failure = nil
    @failure ||= :bad_actual if actual.start_with?('translation missing:')
    @failure ||= :bad_expected if @expected.start_with?('translation missing:')
    @failure ||= :no_match if @expected != actual
    @failure.nil?
  end

  failure_message_for_should do |actual|
    if @failure == :no_match
      "expected \"#{expected}\" to equal \"#{actual}\" but it does not."
    else
      "missing translation for I18n.t('#{key}'#{options ? ", #{options}" : ''})."
    end
  end
end

RSpec::Matchers.define :have_translation_for do |key, options|
  match do |actual|
    @expected = I18n.t(key, options)
    @failure = nil
    @failure ||= :bad_expected if @expected.start_with?('translation missing:')
    @failure ||= :bad_actual if actual.include?('translation missing:')
    @failure ||= :no_match if !actual.include?(@expected)
    @failure.nil?
  end

  failure_message_for_should do |actual|
    case @failure
      when :no_match

        ['expected:', actual, "to include \"#{@expected}\" but it does not."].join("\n")
      when :bad_actual
        ['actual:', actual, 'has missing translations.'].join("\n")
      when :bad_expected
        "missing translation for I18n.t('#{key}'#{options ? ", #{options}" : ''})."
    end
  end
end

RSpec::Matchers.define :have_missing_translations do
  match do |actual|
    actual =~ /translation missing:|%{.+}/
  end

  failure_message_for_should do |actual|
    [actual, 'should have missing translations.'].join("\n")
  end

  failure_message_for_should_not do |actual|
    ['expected:', actual, 'to not have missing translations.'].join("\n")
  end
end