From ad95a01cecd6731cae78cdaa4cb9e0ce8d7b152b Mon Sep 17 00:00:00 2001
From: Ralf Becker <RalfBecker@outdoor-training.de>
Date: Wed, 11 Apr 2018 14:05:49 +0200
Subject: [PATCH] fixing function and test

---
 api/src/Mail.php             | 2 +-
 mail/tests/SaveToVfsTest.php | 8 ++------
 2 files changed, 3 insertions(+), 7 deletions(-)

diff --git a/api/src/Mail.php b/api/src/Mail.php
index 4183bb636f..bf6be9a7c4 100644
--- a/api/src/Mail.php
+++ b/api/src/Mail.php
@@ -6447,7 +6447,7 @@ class Mail
 	 */
 	static function clean_subject_for_filename($filename)
 	{
-		static $filter_pattern = '$[\f\n\t\x0b\:*#?<>%"\|/\x{10000}-\x{10FFFF}]$u';
+		static $filter_pattern = '$[\f\n\t\x0b\:*#?<>%"\|/\x{10000}-\x{10FFFF}\\\\]$u';
 		$file = trim(preg_replace($filter_pattern, ' ', $filename));
 		if (empty($file)) $file = lang('empty');
 		return $file;
diff --git a/mail/tests/SaveToVfsTest.php b/mail/tests/SaveToVfsTest.php
index ec5d066132..236e6ef090 100644
--- a/mail/tests/SaveToVfsTest.php
+++ b/mail/tests/SaveToVfsTest.php
@@ -13,11 +13,7 @@
 
 namespace EGroupware\Mail;
 
-require_once realpath(__DIR__.'/../../api/tests/AppTest.php');	// Application test base
-
-use Egroupware\Api;
-
-class SaveToVfsTest extends \EGroupware\Api\AppTest
+class SaveToVfsTest extends \PHPUnit\Framework\TestCase
 {
 	/**
 	 * Create a custom status we can use to test
@@ -69,7 +65,7 @@ class SaveToVfsTest extends \EGroupware\Api\AppTest
 		$this->assertNotContains('😂', $cleaned);
 
 		// Check if the filename is not empty
-		$this->assertGreaterThan(0, strlen($filename), 'File name is empty');
+		$this->assertGreaterThan(0, strlen($cleaned), 'File name is empty');
 
 		if(!$replacements)
 		{