public function testTransactionalFailsAndDoesNotGetAdded()
 {
     $clients = new Clients(5, 'John Doe', new DateTime('2014-12-11'), 3, [new DateTime('2014-12-16'), new DateTime('2014-12-31'), new DateTime('2015-03-11')], 25.125);
     $transaction = function () use($clients) {
         $this->repository->add($clients);
         throw new \Exception('Just making it fail');
     };
     try {
         $this->repository->transactional($transaction);
     } catch (\Exception $e) {
         $this->assertEquals(4, $this->repository->count());
     }
 }