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

Documentation

Client.decr(key)

Open source

Client.decr(key)

Decrements the number stored at key by one. If the key does not exist, it is set to zero before performing the operation.

Parameters

Parameter	Type	Description
`key`	string	the key to decrement.

Returns

Type	Resolves with	Rejected when
`Promise<number>`	On success, the promise resolves with the value of `key` after the decrement.	If the key contains a value of the wrong type, or contains a string that cannot be represented as an integer, the promise is rejected with an error.

Example

import redis from 'k6/experimental/redis';

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

export default async function () {
  await redisClient.set('mykey', 10, 0);

  let value;
  value = await redisClient.incr('mykey');
  value = await redisClient.incrBy('mykey', value);
  value = await redisClient.decrBy('mykey', value);
  value = await redisClient.decr('mykey');

  if (value !== -1) {
    throw new Error('mykey should have been -1');
  }
}