ioredis-mock/lib/commands/lset.js

This library emulates ioredis by performing all operations in-memory.

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.lset = lset;
function lset(key, i, value) {
  if (!this.data.has(key)) {
    throw new Error('no such key');
  }

  if (this.data.has(key) && !(this.data.get(key) instanceof Array)) {
    throw new Error('Key ' + key + ' does not contain a list');
  }

  var index = parseInt(i, 10);
  var list = this.data.get(key) || [];
  list[index < 0 ? list.length + index : index] = value;
  this.data.set(key, list);

  return 'OK';
}