vue 单元测试报错单元脚本错误?

Question

下面是我写的代码，报的错懵了

import "babel-polyfill"
import Vue from 'vue'
import HiddenDetail from '@/components/components/HiddenDetail.vue'
import Vuex from 'vuex'
import ElementUI from 'element-ui'
import { mount, createLocalVue } from 'vue-test-utils'
Vue.use(ElementUI)
const localVue = createLocalVue()
localVue.use(Vuex)
let wrapper
describe('单元测试开始', () => {
  console.log(HiddenDetail, 'xcccss')
})