public function testFindByDistinct()
 {
     $distinctFields = new Fields(['name']);
     $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);
     $this->repository->add($clients);
     $results = $this->repository->findByDistinct($distinctFields);
     $this->assertEquals(4, count($results));
 }