Javascript 在VueJS中运行测试时出错：路由导航期间出现vue路由器未捕获错误

当我的模板中有路由器组件时，我在单元测试中不断收到此警告：

我曾经为此开过罚单，我也试过同样的方法，但没有成功。只是想知道是否有人知道更多关于这个错误的信息

FinalCountdown.html

<div id="c-final-countdown">
  <h1>Hello App!</h1>
  <p>
    <!-- use router-link component for navigation. -->
    <!-- specify the link by passing the `to` prop. -->
    <!-- <router-link> will be rendered as an `<a>` tag by default -->
    <router-link to="/foo">Go to Foo</router-link>
    <router-link to="/bar">Go to Bar</router-link>
  </p>
</div>

然后我们可以看到组件安装，但我得到了警告错误。希望一切都有意义：D

警告日志：'[vue路由器]路由导航期间未捕获错误：'

import Vue from 'vue'
import router from '../../router'
import FinalCountdown from 'src/components/workflow/FinalCountdown'

describe('workflow/FinalCoundDown component.'), () => {
  const getComponent = (date) => {
    let vm = new Vue({
      template: '<div><final-countdown ref="component"></final-countdown></div>',
      components: {
        FinalCountdown
      }
    })
    return vm
  }

  it('Should render correctly with a date in the future.', () => {
    const tomorrow = new Date(new Date().getTime() + 24 * 60 * 60 * 1000)
    const vm = getComponent().$mount()
    const component = vm.$refs.component

    expect(vm.$el).toBeTruthy()
    console.log(vm.$el) // <div><!----></div>
  })
}

  const getComponent = (date) => {
    Vue.use(vueRouter)
    const routes = { ... };
    const router = new VueRouter({ routes })
    let vm = new Vue({
      router,
      template: '<div><final-countdown ref="component"></final-countdown></div>',
      components: {
        FinalCountdown
      }
    })
    return vm
  }