instrumental/spec/controllers/concerns/localized_spec.rb

# frozen_string_literal: true

require 'rails_helper'

describe ApplicationController, type: :controller do
  controller do
    include Localized

    def success
      head 200
    end
  end

  around do |example|
    current_locale = I18n.locale
    example.run
    I18n.locale = current_locale
  end

  before do
    routes.draw { get 'success' => 'anonymous#success' }
  end

  shared_examples 'default locale' do
    it 'sets available and preferred language' do
      request.headers['Accept-Language'] = 'ca-ES, fa'
      get 'success'
      expect(I18n.locale).to eq :fa
    end

    it 'sets available and compatible language if none of available languages are preferred' do
      request.headers['Accept-Language'] = 'fa-IR'
      get 'success'
      expect(I18n.locale).to eq :fa
    end

    it 'sets default locale if none of available languages are compatible' do
      request.headers['Accept-Language'] = ''
      get 'success'
      expect(I18n.locale).to eq :en
    end
  end

  context 'user with valid locale has signed in' do
    it "sets user's locale" do
      user = Fabricate(:user, locale: :ca)

      sign_in(user)
      get 'success'

      expect(I18n.locale).to eq :ca
    end
  end

  context 'user with invalid locale has signed in' do
    before do
      user = Fabricate.build(:user, locale: :invalid)
      user.save!(validate: false)
      sign_in(user)
    end

    include_examples 'default locale'
  end

  context 'user has not signed in' do
    include_examples 'default locale'
  end
end