Object.create = function (proto) {
  function F () {}
  F.prototype = proto
  return new F()
}

function mockNew (constructor, ...args) {
  const isPrimitive = result => {
    if (result instanceof Object === true) {
      return true
    }
    return false
  }

  const o = Object.create(constructor.prototype)
  const result = constructor.apply(o, args)

  return isPrimitive(result) ? o : result
}