Rails 中由 around_action 设置的测试条件

Question

In a Rails app the current locale ist set in ApplicationController through a around_action callback. This is a cleaner solution than using only a before_action which would leave the request specific locale hanging around.

class ApplicationController < ActionController::Base
  around_action :with_locale

  def with_locale
    I18n.with_locale(find_current_locale) { yield }
  end
end

Since the current locale is reset after the request finished its not so easy to access the request specific locale in a test. With a before_filter the following test would pass:

it 'sets locale from request'
  get :action, locale: locale
  I18n.locale.should == locale
end

I cannot think of a way to implement this test to work with an around_filter without injecting some additional logic into the controller. Is there a simpler way with RSpec?

Answer 1

How about checking if I18n.with_locale has been called with proper parameters.

it 'sets locale from request'
  allow(I18n).to receive(:with_locale)
  get :action, locale: locale
  expect(I18n).to have_received(:with_locale).with(locale)   
end