ReferenceError: regeneratorRuntime is not defined with Jest

[akana]

I use react-numpad in my React project. It works fine for npm run build and npm start. I use Jest and Enzyme for test. Unfortunately, when i run npm test, i get error of importing react-numpad as below:

ReferenceError: regeneratorRuntime is not defined
      3 | import _ from "lodash";
      4 | import { Trans } from "react-i18next";
    > 5 | import NumPad from "react-numpad";
        | ^
      6 | import Decimal from "decimal.js-light";
      at Object.<anonymous> (node_modules/react-numpad/build/elements/TimeView.js:24:1)
      at Object.<anonymous> (node_modules/react-numpad/build/elements/Calendar.js:28:40)
      at Object.<anonymous> (node_modules/react-numpad/build/elements/index.js:51:40)
      at Object.<anonymous> (node_modules/react-numpad/build/components/Number.js:12:17)
      at Object.<anonymous> (node_modules/react-numpad/build/index.js:8:38)

System

• OS : Ubuntu 18.04
• Node : 12.13.1
• npm : 6.12.1

package.json

{
  "version": "0.1.0",
  "dependencies": {
    "axios": "^0.19.0",
    "bootstrap": "^4.4.1",
    "bootstrap-datepicker": "^1.9.0",
    "change-case": "^3.1.0",
    "check-prop-types": "^1.1.2",
    "i18next": "^14.1.1",
    "immer": "^2.1.5",
    "jquery": "^3.4.1",
    "lodash": "^4.17.15",
    "lodash-humps": "^3.1.5",
    "react": "^16.12.0",
    "react-datepicker": "^2.10.1",
    "react-dom": "^16.12.0",
    "react-i18next": "^10.13.2",
    "react-numpad": "^5.0.4",
    "react-paginate": "^6.3.2",
    "react-redux": "^6.0.1",
    "react-router-breadcrumbs-hoc": "^3.2.4",
    "react-router-dom": "^4.3.1",
    "react-scripts": "^3.3.0",
    "react-select": "^3.0.8",
    "redux": "^4.0.4",
    "redux-orm": "^0.12.4",
    "redux-starter-kit": "^0.4.3",
    "redux-thunk": "^2.3.0",
    "reselect": "^4.0.0"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "test-watch": "jest --watch",
    "eject": "react-scripts eject",
  },
  "eslintConfig": {
    "extends": "react-app"
  },
  "browserslist": [
    ">0.2%",
    "not dead",
    "not ie <= 11",
    "not op_mini all"
  ],
  "devDependencies": {
    "@babel/core": "^7.7.5",
    "@babel/plugin-transform-runtime": "^7.7.6",
    "@babel/preset-env": "^7.7.6",
    "babel-jest": "^24.9.0",
    "enzyme": "^3.10.0",
    "enzyme-adapter-react-16": "^1.15.1",
    "identity-obj-proxy": "^3.0.0",
    "jest": "^24.9.0",
    "jest-enzyme": "^7.1.2",
    "node-sass": "^4.13.0",
    "react-test-renderer": "^16.12.0",
    "redux-devtools-extension": "^2.13.8",
    "regenerator-runtime": "^0.13.3",
    "sass-loader": "^7.3.1"
  }
}

babel.config.js

module.exports = function(api) {
  api.cache(true);

  const presets = [
    "@babel/preset-react",
    ["@babel/preset-env", { targets: { node: "current" } }]
  ];

  const plugins = [
    "@babel/plugin-transform-runtime",
    "@babel/plugin-proposal-class-properties"
  ];

  return {
    presets,
    plugins
  };
};

jest.config.js

module.exports = {
  moduleNameMapper: {
    "\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$":
      "<rootDir>/__mocks__/fileMock.js",
    "\\.(css|less|sass|scss)$": "identity-obj-proxy"
  },
  transform: {
    "^.+\\.js$": "babel-jest"
  },
  setupFilesAfterEnv: ["<rootDir>/src/setupTest.js"],
  moduleFileExtensions: ["css", "scss", "js", "json", "jsx"],
  testRegex: "/src/.*\\.test\\.js$",
  transformIgnorePatterns: ["/node_modules/(?!test-component).+\\.js$"],
  moduleDirectories: ["src", "node_modules"],
  testEnvironment: "enzyme",
  testEnvironmentOptions: {
    enzymeAdapter: "react16"
  }
};

Any help would be appreciated 😄

[akana]

The problem is solved by import "babel-polyfill"; in setupTests.js. Source

[maxi-gomez]

Fuente

Gracias crack..! me sirvió te lo agradezco