public function testJsonResult()
{
$this->message->setRegistrationIds(['sdfshj']);
$this->message->setCollapseKey('key');
$this->message->setDelayWhileIdle(true);
$this->message->setTimeToLive(600);
$this->message->setRestrictedPackageName('package.name');
$this->message->setDryRun(true);
$this->message->setData(['key' => 'value']);
$this->message->addNotificationPayload('first', 'first');
$result = json_decode($this->message->toJson());
self::assertTrue(isset($result->notification->first));
}