[ticket/11792] Add functional test for var lang_set_ext of core.user_setup

To ensure that the new lang_set_ext variable available with the
core.user_setup event works properly, a functional test was added. It
overwrites the value of the 'SKIP' language key, which is assumed to remain
in use for some time to come.

PHPBB3-11792

tests/functional/fixtures/ext/foo/bar/event/user_setup.php

@@ -0,0 +1,43 @@
+<?php
+
+/**
+*
+* @package testing
+* @copyright (c) 2013 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+/**
+* @ignore
+*/
+
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+/**
+* Event listener
+*/
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+class phpbb_ext_foo_bar_event_user_setup implements EventSubscriberInterface
+{
+	static public function getSubscribedEvents()
+	{
+		return array(
+			'core.user_setup'	=> 'add_global_translations',
+		);
+	}
+
+	public function add_global_translations($event)
+	{
+		$lang_set_ext = $event['lang_set_ext'];
+		$lang_set_ext[] = array(
+			'ext_name' => 'foo/bar',
+			'lang_set' => 'foo_global',
+		);
+		$event['lang_set_ext'] = $lang_set_ext;
+	}
+}

tests/functional/fixtures/ext/foo/bar/language/en/foo_global.php

@@ -0,0 +1,5 @@
+<?php
+
+$lang = array_merge($lang, array(
+	'SKIP'		=> 'Overwritten by foo',
+));