[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/extension_global_lang_test.php

@@ -0,0 +1,63 @@
+<?php
+/**
+*
+* @package testing
+* @copyright (c) 2013 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+/**
+* @group functional
+*/
+class phpbb_functional_extension_global_lang_test extends phpbb_functional_test_case
+{
+	protected $phpbb_extension_manager;
+
+	static private $helper;
+
+	static protected $fixtures = array(
+		'foo/bar/language/en/',
+		'foo/bar/event/',
+	);
+
+	static public function setUpBeforeClass()
+	{
+		parent::setUpBeforeClass();
+
+		self::$helper = new phpbb_test_case_helpers(self);
+		self::$helper->copy_ext_fixtures(dirname(__FILE__) . '/fixtures/ext/', self::$fixtures);
+	}
+
+	static public function tearDownAfterClass()
+	{
+		parent::tearDownAfterClass();
+
+		self::$helper->restore_original_ext_dir();
+	}
+
+	public function setUp()
+	{
+		parent::setUp();
+		
+		$this->get_db();
+
+		$this->phpbb_extension_manager = $this->get_extension_manager();
+
+		$this->purge_cache();
+	}
+
+	public function test_load_extension_lang_globally()
+	{
+		$this->phpbb_extension_manager->enable('foo/bar');
+
+		// The board index, which should contain an overwritten translation
+		$crawler = self::request('GET', 'index.php');
+
+		// language from language/en/common.php
+		$this->assertNotContains('Skip to content', $crawler->filter('.skiplink')->text());
+
+		// language from ext/foo/bar/language/en/foo_global.php
+		$this->assertContains('Overwritten by foo', $crawler->filter('.skiplink')->text());
+	}
+}