text: import Vue from 'vue';
  import c404 from '@/components/404.vue';
  
  describe('404.vue', () => {
    it('should render correct contents', () => {
      const Constructor = Vue.extend(c404);
      const vm = new Constructor().$mount();
      expect(vm.$el.querySelector('h1').textContent).to.equal('You are lost.');
    });
  });
  