A replacement for sinon.useFakeTimers

useFakeDate.js

const OriginalDate = global.Date
function restoreFakeDate () {
  global.Date = OriginalDate
}

function useFakeDate (date) {
  date = new OriginalDate(date)

  class Date extends OriginalDate {
    constructor (...args) {
      if (args.length) super(...args)
      else super(date)
    }

    static now () {
      return date.getTime()
    }
  }

  global.Date = Date
  return {
    restore: restoreFakeDate,
    tick (ms) {
      date = new OriginalDate(date.getTime() + ms)
    }
  }
}

module.exports = useFakeDate