运行Jest测试时未定义`regeneratorRuntime`

时间：2017-03-01 15:08:18

标签： reactjs babeljs jestjs babel-polyfill babel-jest

标题几乎解释了我所面临的问题。我正在尝试测试具有某种状态的React组件，并尝试将我的商店提供给组件以获得所需的内容。当我使用Jest运行组件测试时，出现以下错误：

ReferenceError: regeneratorRuntime is not defined

我已经通过一些阅读确定这是由babel-polyfill或regenerator-runtime没有正确应用于Jest引起的。但是，我已经尝试安装这两个软件包并重新运行而不会改变结果。在阅读了Jest Github问题页面（Remove auto-inclusion of babel-polyfill #2755）之后，我发现Jest自版本19以来并未自动包含babel-polyfill。我手动安装该软件包应该已经解决了问题，但确实如此。不。我已经包含了一些我认为相关的文件

.babelrc：

{
  "presets": ["es2015", "react", "stage-2"],
  "env": {
    "development": {
      "plugins": [
        ["react-transform", {
          "transforms": [{
            "transform": "react-transform-hmr",
            "imports": ["react"],
            "locals": ["module"]
          }]
        }]
      ]
    }
  }
}

jest.config：

{
    "transform": {
        "^.+\\.(js|jsx)$": "<rootDir>/node_modules/webpack-babel-jest",
        ".*\\.(vue)$": "<rootDir>/node_modules/jest-vue-preprocessor",
        ".*": "babel-jest"
    },
    "moduleNameMapper": {
        "\\.(jpg|jpeg|css|scss|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$": "<rootDir>/__tests__/__mocks__/fileMock.js",
        ".*\\.(vue)$": "vue/dist/vue.js"
    },
    "testPathIgnorePatterns": ["type_parser.spec.js", 
                               "<rootDir>/__tests__/__mocks__/",
                               "__tests__/unit/core/util/type_parser.js",
                               "__tests__/GitlabLoader.test.js"
                               ]
}

package.json：

{
  "name": "my_project",
  "version": "0.2.0",
  "description": "My Project",
  "scripts": {
    "clean:build": "node ./bin/clean.js createdir",
    "build:html": "node ./bin/buildHtml.js",
    "deployProduction": "node ./bin/deployProduction.js",
    "start": "webpack-dev-server --config ./config/webpack.config.dev.js --hot --inline --progress",
    "serve": "npm run deployProduction&& supervisor --watch ./production-copy src/js/server",
    "prebuild": "npm run clean:build",
    "postbuild": "node ./bin/postBuild.js",
    "rebuild-win": "set BUILD_TYPE=preview& npm run prebuild & npm run build-win & npm run serve",
    "build": "set BUILD_TYPE=final& npm run prebuild & npm run build-win",
    "deploy": "npm run build & npm run serve",
    "build-win": "set NODE_ENV=production & npm run element-build & npm run build-doc & npm run build:html &  webpack -p --config ./config/webpack.config.prod.js --json > webpack.log.json & npm run postbuild",
    "lint": "eslint config src/js/**/*.js",
    "jscs": "jscs src/js/",
    "test": "jest --no-cache --verbose --config=./__tests__/jest.config",
    "test:watch": "npm run test -- --watch",
    "element-init": "node node_modules/element-theme/bin/element-theme -i src/js/core/ui/element-theme.css",
    "element-build": "node node_modules/element-theme/bin/element-theme -c src/js/core/ui/element-theme.css -o src/js/core/ui/element-theme ",
    "build-doc": "node bin/buildDoc.js ",
    "storybook": "start-storybook -p 9001 -c .storybook"
  },
  "repository": {
    "type": "git",
    "url": "my_url"
  },
  "license": "MIT",
  "bugs": {
    "url": "my_url"
  },
  "homepage": "my_homepage",
  "dependencies": {
    "autoprefixer": "^6.3.6",
    "axios": "^0.11.1",
    "babel-runtime": "^6.23.0",
    "babel-standalone": "^6.10.3",
    "bluebird": "^3.4.0",
    "brace": "^0.8.0",
    "browserify": "^13.0.1",
    "chai": "^3.5.0",
    "classnames": "2.2.3",
    "cls-bluebird": "^1.0.1",
    "codemirror": "^5.16.0",
    "connect-history-api-fallback": "^1.3.0",
    "continuation-local-storage": "^3.1.7",
    "dateformat": "^1.0.12",
    "diff": "^3.0.1",
    "element-theme": "^0.4.0",
    "element-ui": "^1.1.5",
    "express-history-api-fallback": "^2.0.0",
    "filedrop": "^2.0.0",
    "fs-extra": "^0.30.0",
    "history": "^2.0.2",
    "humps": "^1.0.0",
    "immutability-helper": "^2.1.1",
    "isomorphic-fetch": "^2.2.1",
    "json-loader": "^0.5.4",
    "jszip": "^3.0.0",
    "jszip-utils": "0.0.2",
    "material-ui": "^0.16.7",
    "materialize-css": "^0.97.6",
    "mocha": "^2.5.3",
    "moment": "^2.17.1",
    "normalizr": "^1.0.0",
    "raven-js": "^3.9.1",
    "react": "^15.0.1",
    "react-ace": "^3.5.0",
    "react-addons-update": "^15.4.2",
    "react-dom": "^15.0.1",
    "react-redux": "^4.4.5",
    "react-router": "^2.3.0",
    "react-router-redux": "^4.0.2",
    "redux": "^3.4.0",
    "redux-logger": "^2.6.1",
    "redux-saga": "^0.9.5",
    "request": "^2.72.0",
    "request-promise": "^3.0.0",
    "reselect": "^2.5.4",
    "save-as": "^0.1.7",
    "showdown": "^1.4.2",
    "three": "^0.79.0",
    "url-pattern": "^1.0.3",
    "vue": "^2.0.5",
    "vue-easy-slider": "^1.4.0",
    "vue-loader": "^9.8.1",
    "vue-router": "^2.0.1",
    "vue-slider-component": "^2.0.4",
    "walk": "^2.3.9"
  },
  "devDependencies": {
    "@kadira/storybook": "^2.35.3",
    "babel-core": "^6.7.6",
    "babel-eslint": "^6.1.0",
    "babel-jest": "^18.0.0",
    "babel-loader": "^6.0.2",
    "babel-plugin-react-transform": "^2.0.2",
    "babel-polyfill": "^6.23.0",
    "babel-preset-es2015": "^6.22.0",
    "babel-preset-es2016": "^6.22.0",
    "babel-preset-react": "^6.23.0",
    "babel-preset-stage-2": "^6.5.0",
    "babel-register": "^6.7.2",
    "chai": "3.5.0",
    "chai-jquery": "2.0.0",
    "cheerio": "0.20.0",
    "colors": "1.1.2",
    "concurrently": "^2.0.0",
    "copy-webpack-plugin": "2.1.1",
    "css-loader": "0.23.1",
    "element-theme-default": "^1.1.5",
    "enzyme": "^2.7.1",
    "eslint": "^2.13.1",
    "eslint-config-airbnb": "^9.0.1",
    "eslint-plugin-import": "^2.2.0",
    "eslint-plugin-jsx-a11y": "^4.0.0",
    "eslint-plugin-react": "^5.2.2",
    "express": "^4.13.4",
    "extract-text-webpack-plugin": "1.0.1",
    "file-loader": "0.8.5",
    "identity-obj-proxy": "^3.0.0",
    "jest": "^19.0.2",
    "jest-cli": "^18.1.0",
    "jest-css-modules": "^1.1.0",
    "jest-enzyme": "^2.1.2",
    "jest-vue-preprocessor": "^0.1.2",
    "jquery": "2.2.3",
    "jscs": "3.0.3",
    "jsdoc-to-markdown": "^2.0.0",
    "jsdom": "8.4.0",
    "json-loader": "^0.5.4",
    "mocha": "^2.4.5",
    "ncp": "^2.0.0",
    "node-sass": "3.7.0",
    "postcss-loader": "0.8.2",
    "react-addons-test-utils": "^15.4.2",
    "react-hot-loader": "1.3.0",
    "react-test-renderer": "^15.4.2",
    "react-transform-hmr": "^1.0.4",
    "redux-devtools": "^3.3.1",
    "redux-devtools-dock-monitor": "^1.1.1",
    "redux-devtools-log-monitor": "^1.0.11",
    "regenerator-runtime": "^0.10.3",
    "remotedev": "^0.1.2",
    "rimraf": "^2.5.2",
    "sass-loader": "3.2.0",
    "storybook-addon-material-ui": "^0.7.6",
    "style-loader": "0.13.1",
    "url-loader": "0.5.7",
    "vueify": "^9.4.0",
    "webpack": "^1.13.0",
    "webpack-babel-jest": "^1.0.4",
    "webpack-dev-middleware": "^1.6.1",
    "webpack-dev-server": "^1.16.3",
    "webpack-hot-middleware": "^2.10.0"
  }
}

8 个答案:

答案 0 :(得分：18)

我使用import "babel-polyfill"并解决了我的问题

答案 1 :(得分：10)

如果您使用的是 setupTests.js 文件，则可以从此处导入 regenerator-runtime ：

// setupTests.js

import 'regenerator-runtime/runtime'
import Enzyme from 'enzyme'
import EnzymeAdapter from 'enzyme-adapter-react-16'

Enzyme.configure({
  adapter: new EnzymeAdapter()
})


然后，您可以将 setupTests.js 导入每个测试文件或更好的测试文件中，只需在 package.json 中将 setupFilesAfterEnv 添加到Jest配置中： / p> 

// package.json

{
  ...
  "dependencies": {
    ...
  },
  "devDependencies": {
    ...
  },
  "jest": {
    "setupFilesAfterEnv": ["./pathToYour/setupTests.js"] 
  }
}


不要忘记安装regenerator-runtime软件包：

$ yarn add regenerator-runtime


无需导入完整的babel-polyfill（如果Babel≥v.7.0.0，则为@ babel / polyfill），因为btw已depracated，而直接包含core-js / stable和regenerator-runtime /运行时。

答案 2 :(得分：8)

对于经过2020年彻底解决此问题的任何人，这里都是我发现其他任何答案都找不到的信息。

我的项目已按照Babel 7.9.0 setup中的建议进行配置。 完成所有这些步骤并将 @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment View view = inflater.inflate(R.layout.fragment_search, container, false); searchFragmentInstance = this; filterManager = new FilterManager(); //set toolbar Toolbar toolbar = view.findViewById(R.id.toolbar_search); ((AppCompatActivity)getActivity()).setSupportActionBar(toolbar); //other code... return view; } 导入两个入口点的顶部之后，ReferenceError仍然存在。从玩笑的文档中，我发现了这一点，从而解决了我的问题：

// babel.config.js 

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {

    super.onPrepareOptionsMenu(menu);
    inflater.inflate(R.menu.search, menu);
    MenuItem item = menu.findItem(R.id.action_search);

    SearchManager searchManager = (SearchManager) getContext().getSystemService(Context.SEARCH_SERVICE);

    SearchView searchView = (SearchView) item.getActionView();
    searchView.setSearchableInfo(searchManager.getSearchableInfo(getActivity().getComponentName()));
    searchView.setBackgroundColor(getResources().getColor(R.color.colorPrimaryDark));

  //other code...
}

Jest documentation reference

答案 3 :(得分：2)

我在 Laravel mix 中使用 Vuejs、Vue Jest，这对我有用

import 'regenerator-runtime/runtime'
import { mount } from '@vue/test-utils'
import App from '../App';

// eslint-disable-next-line no-undef
test('it works', () => {
  // eslint-disable-next-line no-undef
  expect(1 + 1).toBe(2);
});

// eslint-disable-next-line no-undef
test('should mount without crashing', () => {
  const wrapper = mount(App);
  // eslint-disable-next-line no-undef
  expect(wrapper).toMatchSnapshot();
});

答案 4 :(得分：1)

截至2019年10月2日的最新解决方案是将以下内容导入您的setupTests.js文件中。

import 'core-js/stable';
import 'regenerator-runtime/runtime';

babel-polyfill已过时。

答案 5 :(得分：1)

跟进 Jero 的回答。如果您使用的是 npm，则可以在测试文件中执行 npm i -D regenerator-runtime 和 import 'regenerator-runtime/runtime';。

答案 6 :(得分：0)

在将babel-polyfill导入到每个有效的测试中时，Updated jest docs (v24)建议在babel配置中进行设置。如果执行此操作，则不再需要导入babel-polyfill。 （个人而言，我在targets配置中缺少preset-env选项）。

// babel.config.js
module.exports = {
  presets: [
    [
      '@babel/preset-env',
      {
        targets: {
          node: 'current',
        },
      },
    ],
  ],
};

答案 7 :(得分：0)

如果有人在搜索错误消息时登陆这里但没有使用 Babel，那么可能是从 according to Jest documentation 开始，项目目录中存在旧的 Babel 配置文件：

<块引用>

让你的 Babel 配置能够感知笑话
[...]
如果 babel 配置，Jest 会自动转换文件 存在于您的项目中。为避免这种行为，您可以明确地 重置转换配置选项：

// jest.config.js
module.exports = {
  transform: {},
};
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