89

标题几乎解释了我所面临的。我正在尝试测试React具有某种状态的组件，并尝试将我的商店提供给组件以获得它需要的东西。当我使用 Jest 运行组件测试时，出现以下错误：

ReferenceError: regeneratorRuntime is not defined

我通过一些阅读确定这是由于babel-polyfill或未regenerator-runtime正确应用于 Jest 引起的。但是，我尝试安装这两个软件包并重新运行，结果没有任何变化。在阅读了 Jest Github 问题页面（删除 babel-polyfill #2755 的自动包含）后，我发现babel-polyfillJest 从版本 19 开始并未自动包含该问题。我手动安装该软件包应该已经解决了该问题，但确实如此不是。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"
  }
}
4

9 回答 9

106

如果您使用的是setupTests.js文件，您可以从那里导入regenerator-runtime ：

// setupTests.js

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

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

 
然后你可以将setupTests.js导入到每个测试文件中，或者更好的是，在你的package.json中，只需将setupFilesAfterEnv添加到 jest 配置中：

// package.json

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

 
不要忘记安装regenerator-runtime包：

$ yarn add regenerator-runtime --dev

 
不需要导入完整的 babel-polyfill（或 @babel/polyfill，如果 Babel ≥ v.7.0.0），btw 已被弃用，而是直接包含 core-js/stable 和 regenerator-runtime/runtime。

于 2019-08-10T06:20:13.177 回答
56

虽然导入babel-polyfill到每个测试都有效，但更新的 jest 文档 (v24)建议在您的 babel 配置中进行设置。如果你这样做，你应该不再需要导入babel-polyfill. （就我个人而言，我的配置中缺少该targets选项preset-env）。

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

明智的一句话：指定targets将覆盖browserslist您定义的任何配置（否则 babel 会使用）。因此，在 Web 项目中，您可能希望创建一个babel.config.js“可感知开玩笑”的动态，以便仅targets在测试环境时添加。请参阅jest 文档中标题为“让你的 Babel 配置 jest-aware”的部分。

于 2019-05-23T03:21:03.720 回答
44

我用过import "babel-polyfill"，它解决了我的问题。

2020 年更新： 此答案已过时，babel-polyfill已弃用。查看文档和Jero 的答案。

于 2017-09-21T05:26:46.380 回答
25

babel-core@bridge安装和@babel/core@7：

我通过添加插件@babel/plugin-transform-runtime并将以下内容传递给我的 babel 配置解决了这个问题：

{
 // ...
 env: {
   test: {
     // ...
      plugins: [
        '@babel/plugin-transform-runtime'
      ]
    }
  }
}

编辑：或者，正如其他人评论的那样，您也可以只向的配置添加一个选项@babel/preset-env，它应该可以工作：

{
  "presets": [
    [
      "@babel/preset-env",
      {
        "targets": {
          "node": "current"
        }
      }
    ]
  ]
}
于 2020-01-20T12:49:53.303 回答
20

对于在 2020 年遇到此问题的任何人，在彻底阅读 SO 之后，这里是我发现在任何其他答案中都缺少的信息。

我的项目按照Babel 7.9.0 setup中的建议进行配置。在完成所有这些步骤并导入'@babel/register'到我的两个入口点的顶部之后，ReferenceError 仍然存在。从开玩笑的文档中，我发现了这个，它解决了我的问题：

// babel.config.js

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

Jest 文档参考

于 2020-04-05T11:24:58.947 回答
19

setupTests.js截至 2019 年 10 月 2 日的最新解决方案是在您的文件中导入以下内容。

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

babel-polyfill已弃用。

于 2019-10-02T11:29:51.737 回答
3

如果有人在搜索错误消息时登陆这里但没有使用 Babel，那么根据 Jest 文档，可能是项目目录中存在旧的 Babel 配置文件：

让您的 Babel 配置具有 jest-aware
[...]
如果您的项目中存在 babel 配置，Jest 将自动转换文件。为避免此行为，您可以显式重置转换配置选项：

// jest.config.js
module.exports = {
  transform: {},
};
于 2021-06-09T18:34:51.243 回答
3

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();
});
于 2021-02-28T09:25:22.390 回答
2

跟进杰罗的回答。如果您使用的是 npm，您可以这样做npm i -D regenerator-runtime，然后import 'regenerator-runtime/runtime';在您的测试文件中。

于 2021-02-08T05:06:19.157 回答