require 'abstract_unit' class LocalizedController < ActionController::Base def hello_world end end class LocalizedTemplatesTest < ActionController::TestCase tests LocalizedController def test_localized_template_is_used I18n.locale = :de get :hello_world assert_equal "Gutten Tag", @response.body end def test_default_locale_template_is_used_when_locale_is_missing I18n.locale = :dk get :hello_world assert_equal "Hello World", @response.body end end