public function testMutatorsAccessors() { self::assertCount(0, $this->message->getNotificationPayload()); $this->message->addNotificationPayload('first', 'first'); self::assertCount(1, $this->message->getNotificationPayload()); $this->message->setNotificationPayload(['first' => 'first', 'second' => 'second']); self::assertCount(2, $this->message->getNotificationPayload()); $this->message->clearNotificationPayload(); self::assertCount(0, $this->message->getNotificationPayload()); }