public function testGetAccessToken()
 {
     $session = $this->createSessionStub();
     $client = $this->createClientStub();
     $this->manager->setTokenGenerator($this->createTokenGeneratorStub());
     $accessToken = $this->manager->createAccessToken($session, $client);
     $loadedAccessToken = $this->manager->getAccessToken($accessToken->getToken());
     $this->assertEquals($loadedAccessToken->toArray(), $accessToken->toArray());
 }