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

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

"use strict";

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

function sdiff(ours, ...theirs) {
  if (this.data.has(ours) && !(this.data.get(ours) instanceof Set)) {
    throw new Error(`Key ${ours} does not contain a set`);
  }

  theirs.forEach(key => {
    if (this.data.has(key) && !(this.data.get(key) instanceof Set)) {
      throw new Error(`Key ${key} does not contain a set`);
    }
  });
  const ourSet = this.data.has(ours) ? this.data.get(ours) : new Set();
  const theirSets = theirs.map(key => this.data.has(key) ? this.data.get(key) : new Set());
  const difference = new Set(Array.from(ourSet).filter(ourValue => theirSets.reduce((isUnique, set) => set.has(ourValue) ? false : isUnique,
  /* isUnique */
  true)));
  return Array.from(difference);
}