public function testDelegatorFromCallback()
 {
     $realService = $this->getMock('stdClass', array(), array(), 'RealService');
     $delegator = $this->getMock('stdClass', array(), array(), 'Delegator');
     $delegatorFactoryCallback = function ($serviceManager, $cName, $rName, $callback) use($delegator) {
         $delegator->real = call_user_func($callback);
         return $delegator;
     };
     $this->serviceManager->setFactory('foo-service', function () use($realService) {
         return $realService;
     });
     $this->serviceManager->addDelegator('foo-service', $delegatorFactoryCallback);
     $service = $this->serviceManager->create('foo-service');
     $this->assertSame($delegator, $service);
     $this->assertSame($realService, $service->real);
 }