public static function performSetup(ezcWebdavClientTest $test, $testSetName)
 {
     if (basename(dirname($testSetName)) !== self::$lastTestSuite) {
         self::$lastTestSuite = basename(dirname($testSetName));
         self::$backend = self::setupBackend();
     }
     $test->server = self::getServer(new ezcWebdavBasicPathFactory('http://webdav'));
     $test->backend = self::$backend;
 }