[ticket/11927] Correctly add new files on update

Currently we ignore language and style files when the directory where they
go to do not exist. However in 3.1 we introduce some new sub directories:
* language/en/email/short/
* styles/prosilver/theme/en/
So we need to change our check to look whether the language or style exist,
rather then the parent directory.

PHPBB3-11927

tests/functions_install/ignore_new_file_on_update_test.php

@@ -0,0 +1,39 @@
+<?php
+/**
+*
+* @package testing
+* @copyright (c) 2013 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+require_once dirname(__FILE__) . '/../../phpBB/includes/functions_install.php';
+
+class phpbb_functions_install_ignore_new_file_on_update_test extends phpbb_test_case
+{
+	static public function ignore_new_file_on_update_data()
+	{
+		return array(
+			array('willneverexist.php', false),
+			array('includes/dirwillneverexist/newfile.php', false),
+
+			array('language/en/email/short/bookmark.txt', false),
+			array('language/languagewillneverexist/email/short/bookmark.txt', true),
+
+			array('styles/prosilver/template/bbcode.html', false),
+			array('styles/stylewillneverexist/template/bbcode.html', true),
+
+			array('styles/prosilver/theme/en/icon_user_online.gif', false),
+			array('styles/prosilver/theme/languagewillneverexist/icon_user_online.gif', true),
+		);
+	}
+
+	/**
+	* @dataProvider ignore_new_file_on_update_data
+	*/
+	public function test_ignore_new_file_on_update($file, $expected)
+	{
+		global $phpbb_root_path;
+		$this->assertEquals($expected, ignore_new_file_on_update($phpbb_root_path, $file));
+	}
+}