[Vue警告]：未知的自定义元素：<nuxt-link>-运行Jest单元测试时

Question

问题

我使用nuxt 1.4，并使用Jest进行路由以进行单元测试。我的应用程序不会抛出错误，并且看起来运行良好。但是，当运行我的单元测试npm run unit（运行笑话）时，它将在终端中引发错误：[Vue warn]: Unknown custom element: <nuxt-link> - did you register the component correctly? For recursive components, make sure to provide the "name" option.

预期

我希望它不会引发此错误，因为我的应用程序正在运行。

档案

package.json：

{
  "name": "vue-starter",
  "version": "1.0.0",
  "description": "Nuxt.js project",
  "private": true,
  "scripts": {
    "dev": "nuxt",
    "build": "nuxt build",
    "start": "nuxt start",
    "generate": "nuxt generate",
    "lint": "eslint --ext .js,.vue --ignore-path .gitignore .",
    "precommit": "npm run lint",
    "test": "npm run lint && npm run unit",
    "unit": "jest",
    "unit:report": "jest --coverage"
  },
  "dependencies": {
    "babel-jest": "^22.4.1",
    "jest-serializer-vue": "^1.0.0",
    "node-sass": "^4.7.2",
    "npm": "^5.7.1",
    "nuxt": "^1.0.0",
    "sass-loader": "^6.0.7",
    "vue-jest": "^2.1.1"
  },
  "devDependencies": {
    "@vue/test-utils": "^1.0.0-beta.12",
    "babel-eslint": "^8.2.1",
    "eslint": "^4.15.0",
    "eslint-friendly-formatter": "^3.0.0",
    "eslint-loader": "^1.7.1",
    "eslint-plugin-vue": "^4.0.0",
    "jest": "^22.4.2"
  },
  "browserslist": [
    "> 1%",
    "last 2 versions",
    "not ie <= 8"
  ],
  "jest": {
    "moduleFileExtensions": [
      "js",
      "vue"
    ],
    "transform": {
      "^.+\\.js$": "<rootDir>/node_modules/babel-jest",
      ".*\\.(vue)$": "<rootDir>/node_modules/vue-jest"
    },
    "snapshotSerializers": [
      "<rootDir>/node_modules/jest-serializer-vue"
    ]
  }
}

我测试的组件：

<template>
  <div>
    <nuxt-link class="name" :to="{ path: `entity/${item.id}`, params: { id: item.id }}">{{item.name}}</nuxt-link>
    <button class="connect" @click="connect">{{ btnText }}</button>
  </div>
</template>

<script>
  // import nuxtLink from '../.nuxt/components/nuxt-link';

  const connectionStatusMap = [
    'Connect',
    'Connected',
    'Pending',
    'Cancel',
  ];

  export default {
    /*components: {
      'nuxt-link': nuxtLink,
    },*/
    props: {
      item: {
        type: Object
      }
    },
    ...
  }
</script>

我的测试脚本：

import TestItem from '../components/TestItem';
import { shallow, mount, createLocalVue } from '@vue/test-utils';
import Vuex from 'vuex';
import VueRouter from 'vue-router';

const localVue = createLocalVue()

localVue.use(Vuex)
localVue.use(VueRouter)

...
it(`should show the entity`, () => {
    const wrapper = mount(TestItem, {
      propsData: { item },
      localVue,
      store,
      // stubs: ['nuxt-link'],
    })
    expect(wrapper.find('.name').text()).toBe(item.name);
  });

  it(`should show allow me to connect if I'm not yet connected`, () => {
    const wrapper = shallow(TestItem, {
      propsData: { item },
      localVue,
      store,
      stubs: ['nuxt-link'],
    })
    expect(wrapper.find('.connect').text()).toBe('Connect');
  });
...

我试过了

我试图创建一个localVue并捻熄组件作为建议在这个github上评论 我也试过shallow/ mount但似乎工作没有任何。

Answer 1

尽管提供的答案可能有效。我最终使用的是基于本指南

const wrapper = mount(TestItem, {
  propsData: { item },
  localVue,
  store,
  stubs: {
    NuxtLink: true,
    // Any other component that you want stubbed
  },
});

Answer 2

这就是我摆脱恼人警告的方式：

包括RouterLinkStub，例如：

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

将NuxtLink存根映射到RouterLinkStub

const wrapper = shallowMount(TestItem, {
  ...
  stubs: {
    NuxtLink: RouterLinkStub
  }
})

如果您正在检查nuxt-link文本或其他内容，请更改：

const link = wrapper.find('nuxt-link');

至

const link = wrapper.find(RouterLinkStub);

在https://onigra.github.io/blog/2018/03/19/vue-test-utils-router-link-stub/

好东西，您不需要懂日语就可以阅读代码...