/**
 * Будет resolved через 1000 милисекунд.
 */
const min = new Promise(resolve => setTimeout(resolve, 1000));

/**
 * Будет resolved через 2000 милисекунд.
 */
const max = new Promise(resolve => setTimeout(resolve, 2000));

/**
 * Будет resolved через случайное время.
 */
const requiredRandom =
  new Promise(resolve => setTimeout(resolve, Math.floor(Math.random() * 5000)));

/**
 * Будет resolved через случайное время.
 */
const optionalRandom =
  new Promise(resolve => setTimeout(resolve, Math.floor(Math.random() * 5000)));

/**
 * Promise такой, что:
 * requiredRandom =  500, optionalRandom =  500 => promise = 1000 (promise = min)
 * requiredRandom =  500, optionalRandom = 1500 => promise = 1500 (promise = optionalRandom)
 * requiredRandom =  500, optionalRandom = 2500 => promise = 2000 (promise = max)
 * requiredRandom = 1500, optionalRandom =  500 => promise = 1500 (promise = requiredRandom)
 * requiredRandom = 1500, optionalRandom = 1500 => promise = 1500 (promise = requiredRandom)
 * requiredRandom = 1500, optionalRandom = 2500 => promise = 2000 (promise = max)
 * requiredRandom = 2500, optionalRandom =  500 => promise = 2500 (promise = requiredRandom)
 * requiredRandom = 2500, optionalRandom = 1500 => promise = 2500 (promise = requiredRandom)
 * requiredRandom = 2500, optionalRandom = 2500 => promise = 2500 (promise = requiredRandom)
 */
const promise = undefined;