/**
  * @test
  */
 public function it_retrieves_the_service_when_set_up_has_been_called()
 {
     $serviceContainer = new ServiceContainer();
     $serviceContainer['some_service'] = $serviceContainer->share(function () {
         return new \stdClass();
     });
     $serviceContainer->setUp();
     $serviceExists = $serviceContainer['some_service'];
     $this->assertInstanceOf('stdClass', $serviceExists);
 }