public function testReferenceUsesIdentityMap()
{
$dm = $this->createDocumentManager();
$user1 = $dm->getReference('Doctrine\\Tests\\Models\\CMS\\CmsUser', 1);
$user2 = $dm->getReference('Doctrine\\Tests\\Models\\CMS\\CmsUser', 1);
$this->assertSame($user1, $user2);
}