public function testLogError()
 {
     $SofortLibAbstractMock = new SofortLibAbstractMock(self::$configkey);
     $FileLoggerHandler = $this->getMockForAbstractClass('fileLogger');
     $FileLoggerHandler->expects($this->any())->method('log')->with('error')->will($this->returnValue('error'));
     $SofortLibAbstractMock->setLogger($FileLoggerHandler);
     $SofortLibAbstractMock->setLogEnabled();
     $this->assertNull($SofortLibAbstractMock->logError('error'));
 }