public function testinsertMailBoxFolders()
 {
     $inboundEmail = new InboundEmail();
     $inboundEmail->id = '101';
     //execute the method and test if it works and does not throws an exception.
     try {
         $inboundEmail->insertMailBoxFolders(array('INBOX', 'OUTBOX'));
         $this->assertTrue(true);
     } catch (Exception $e) {
         $this->fail();
     }
 }