Add tests for translation scope being preserved when inheriting a con…

…troller

issue heartcombo#3367

test/controllers/inherited_controller_i18n_messages_test.rb

@@ -0,0 +1,51 @@
+require 'test_helper'
+
+class SessionsInheritedController < Devise::SessionsController
+  def test_i18n_scope
+    set_flash_message(:notice, :signed_in)
+  end
+end
+
+class AnotherInheritedController < SessionsInheritedController
+  protected
+
+  def translation_scope
+    'another'
+  end
+end
+
+class InheritedControllerTest < ActionController::TestCase
+  tests SessionsInheritedController
+
+  def setup
+    @mock_warden = OpenStruct.new
+    @controller.request.env['warden'] = @mock_warden
+    @controller.request.env['devise.mapping'] = Devise.mappings[:user]
+  end
+
+  test 'I18n scope is inherited from Devise::Sessions' do
+    I18n.expects(:t).with do |message, options|
+      message == 'user.signed_in' &&
+        options[:scope] == 'devise.sessions'
+    end
+    @controller.test_i18n_scope
+  end
+end
+
+class AnotherInheritedControllerTest < ActionController::TestCase
+  tests AnotherInheritedController
+
+  def setup
+    @mock_warden = OpenStruct.new
+    @controller.request.env['warden'] = @mock_warden
+    @controller.request.env['devise.mapping'] = Devise.mappings[:user]
+  end
+
+  test 'I18n scope is overridden' do
+    I18n.expects(:t).with do |message, options|
+      message == 'user.signed_in' &&
+        options[:scope] == 'another'
+    end
+    @controller.test_i18n_scope
+  end
+end