public function testConstructor()
 {
     $client = new Client();
     $hydrator = new APIHydrator([], null);
     $collection = new Collection();
     $service = new TestService($client, $hydrator, $collection);
     $this->assertSame($client, $service->getClient());
     $this->assertSame($hydrator, $service->getHydrator());
     $this->assertAttributeEquals($collection, 'collectionPrototype', $service);
 }