vuejs2 - Vue-Test-Utils 未知的自定义元素 : <router-link>

Question

我正在使用 Jest 使用 vue-test-utils 库运行我的测试。

即使我已将 VueRouter 添加到 localVue 实例，它仍说它实际上无法找到 router-link 组件。如果代码看起来有点古怪，那是因为我使用的是 TypeScript，但它应该读起来非常接近 ES6……主要是 @Prop() 与传入 props 相同:{..}

Vue 组件:

<template>
  <div>
    <div class="temp">
      <div>
        <router-link :to="temp.url">{{temp.name}}</router-link>
      </div>
    </div>
  </div>
</template>

<script lang="ts">
import Vue from 'vue'
import Component from 'vue-class-component'
import { Prop } from 'vue-property-decorator'
import { Temp } from './Temp'

@Component({
  name: 'temp'
})
export default class TempComponent extends Vue {
  @Prop() private temp: Temp
}
</script>

<style lang="scss" scoped>
.temp {
  padding-top: 10px;
}
</style>

临时型号:

export class Temp {
  public static Default: Temp = new Temp(-1, '')

  public url: string

  constructor(public id: number, public name: string) {
    this.id = id
    this.name = name
    this.url = '/temp/' + id
  }
}

Jest 测试

import { createLocalVue, shallow } from '@vue/test-utils'
import TempComponent from '@/components/Temp.vue'
import { Temp } from '@/components/Temp'
import VueRouter from 'vue-router'

const localVue = createLocalVue()
localVue.use(VueRouter)

describe('Temp.vue Component', () => {
  test('renders a router-link tag with to temp.url', () => {
    const temp = Temp.Default
    temp.url = 'http://some-url.com'

    const wrapper = shallow(TempComponent, {
      propsData: { temp }
    })
    const aWrapper = wrapper.find('router-link')
    expect((aWrapper.attributes() as any).to).toBe(temp.url)
  })
})

我错过了什么？测试实际上通过了，它只是抛出警告。事实上，这里是输出:

测试输出:

$ jest --config test/unit/jest.conf.js
 PASS  ClientApp\components\__tests__\temp.spec.ts
  Temp.vue Component
    √ renders a router-link tag with to temp.url (30ms)

  console.error node_modules\vue\dist\vue.runtime.common.js:589
    [Vue warn]: Unknown custom element: <router-link> - did you register the 
component correctly? For recursive components, make sure to provide the 
"name" option.

    (found in <Root>)

Test Suites: 1 passed, 1 total
Tests:       1 passed, 1 total
Snapshots:   0 total
Time:        4.677s
Ran all test suites.
Done in 6.94s.

感谢您提供的任何帮助!

Answer 1

添加 router-link stub 到 shallow (或 shallowMount )方法选项如下:

const wrapper = shallow(TempComponent, {
     propsData: { temp },
     stubs: ['router-link']
})

或 this way :

import { RouterLinkStub } from '@vue/test-utils';

const wrapper = shallow(TempComponent, {
     propsData: { temp },
     stubs: {
         RouterLink: RouterLinkStub
     }
})

执行此操作后，错误应该消失。