@silverwind/ioredis-mock/lib/commands/sunion.js

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

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.sunion = sunion;

function sunion(...keys) {
  keys.forEach(key => {
    if (this.data.has(key) && !(this.data.get(key) instanceof Set)) {
      throw new Error(`Key ${key} does not contain a set`);
    }
  });
  const sets = keys.map(key => this.data.has(key) ? this.data.get(key) : new Set());
  const union = new Set(sets.reduce((combined, set) => [...combined, ...Array.from(set)], []));
  return Array.from(union);
}