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This is documentation for the next version of K6. For the latest stable release, go to the latest version.

Open source

Client.exists(keys)

Returns the number of key arguments that exist. Note that if the same existing key is mentioned in the argument multiple times, it will be counted multiple times.

Parameters

ParameterTypeDescription
keysstring[]the keys to check the existence of.

Returns

TypeResolves withRejected when
Promise<number>On success, the promise resolves with the number of keys that exist from those specified as arguments.

Example

JavaScript
import redis from 'k6/experimental/redis';

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

export default async function () {
  let exists = await redisClient.exists('mykey');
  if (exists === true) {
    throw new Error('mykey should not exist');
  }

  await redisClient.set('mykey', 'myvalue', 0);

  exists = await redisClient.exists('mykey');
  if (exists === false) {
    throw new Error('mykey should exist');
  }

  await redisClient.del('mykey');
}