public function renderGetsIdentifierForObjectFromPersistenceManager()
{
$object = new \stdClass();
$this->mockPersistenceManager->expects($this->atLeastOnce())->method('getIdentifierByObject')->with($object)->will($this->returnValue('6f487e40-4483-11de-8a39-0800200c9a66'));
$expectedResult = '6f487e40-4483-11de-8a39-0800200c9a66';
$actualResult = $this->viewHelper->render($object);
$this->assertEquals($expectedResult, $actualResult);
}