Client.persist(key)

import redis from 'k6/x/redis';

// Instantiate a new redis client
const redisClient = new redis.Client('redis://localhost:6379');

export default async function () {
  await redisClient.set('mykey', 'myvalue', 10);
  await redisClient.expire('mykey', 100);

  const ttl = await redisClient.ttl('mykey');
  if (ttl <= 10) {
    throw new Error('mykey should have a ttl of 10 <= x < 100');
  }

  await redisClient.persist('mykey', 100);
}