Question

不确定为什么在此行抱怨：

const wrapper = shallow(<BitcoinWidget {...props} />);

整个测试：

import React from 'react';
import { shallow } from 'enzyme';
import toJson from 'enzyme-to-json';

// Local components
import BitcoinWidget from './bitcoinWidget';

const props = {
  logo: 'foobar',
  coin: {
    price: 0
  },
  refresh: jest.fn()
}

describe('when rendering', () => {
  const wrapper = shallow(<BitcoinWidget {...props} />);

  it('should render a component matching the snapshot', () => {
    const tree = toJson(wrapper);
    expect(tree).toMatchSnapshot();
    expect(wrapper).toHaveLength(1);
  });
});

组件

import React from 'react';

const BitcoinWidget = ({ logo, coin : { price }, refresh }) => {
  return (
    <div className="bitcoin-wrapper shadow">
      <header>
        <img src={logo} alt="Bitcoin Logo"/>
      </header>
      <div className="price">
        Coinbase
        ${price}
      </div>
      <button className="btn striped-shadow white" onClick={refresh}>
        <span>Refresh</span>
      </button>
    </div>
  );
}

export default BitcoinWidget;

还有我的package.json

{
  "name": "bitcoin",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "axios": "^0.18.0",
    "react": "^16.4.2",
    "react-dom": "^16.4.2",
    "react-redux": "^5.0.7",
    "react-scripts": "1.1.5",
    "redux": "^4.0.0",
    "redux-thunk": "^2.3.0"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "eject": "react-scripts eject",
    "test": "yarn run test-jest:update --verbose --maxWorkers=2",
    "test-jest:update": "jest src --updateSnapshot",
    "test-jest": "jest src"
  },
  "now": {
    "name": "bitcoin",
    "engines": {
      "node": "8.11.3"
    },
    "alias": "leongaban.com"
  },
  "jest": {
    "verbose": true,
    "moduleNameMapper": {
      "\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$": "<rootDir>/client/assetsTransformer.js"
    },
    "moduleFileExtensions": [
      "js",
      "jsx"
    ],
    "moduleDirectories": [
      "node_modules"
    ]
  },
  "devDependencies": {
    "enzyme": "^3.4.4",
    "enzyme-to-json": "^3.3.4",
    "jest": "^23.5.0"
  }
}

Answer 1

将此添加到您的package.json玩笑配置中。

"transform": {
      "\\.js$": "<rootDir>/node_modules/babel-jest"
    },

让我知道问题是否仍然存在。

Answer 2

在使用Webpack创建的React应用程序中设置Jest时，我也遇到了相同的错误。我必须添加@babel/preset-env，并且它已修复。我也写了一篇关于博客的文章。

npm i -D @babel/preset-env

然后将其添加到.babelrc文件的“预设”中。例如

{ 
  "presets": ["@babel/react", "@babel/env"]
}

https://medium.com/@shubhgupta147/how-i-solved-issues-while-setting-up-jest-and-enzyme-in-a-react-app-created-using-webpack-7e321647f080?sk=f3af93732228d60ccb24b47ef48d7062

Answer 3

对于使用create-react-app的任何人，在使用create-react-app时，package.json中只能更改某些笑话配置。

我在Jest提取内部库方面遇到问题，无论我从该库中导入什么内容，Jest都会显示“意外令牌”错误。

要解决此问题，您可以将测试脚本更改为以下内容： "test": "react-scripts test --transformIgnorePatterns 'node_modules/(?!(<your-package-goes-here>)/)'",

Answer 4

对于任何在这个问题上挣扎并且上述答案都不适合他/她的人。

找了好久，终于找到了这个方案

编辑您的 jest.config.js 以添加 transformIgnorePatterns

//jest.config.js

module.exports = {
    preset: 'ts-jest',
    testEnvironment: 'jsdom',
    testMatch: ["**/__tests__/**/*.ts?(x)", "**/?(*.)+(test).ts?(x)"],
    transform: {
        "^.+\\.(js|ts)$": "ts-jest",
    },
    transformIgnorePatterns: [
        "/node_modules/(?![@autofiy/autofiyable|@autofiy/property]).+\\.js$",
        "/node_modules/(?![@autofiy/autofiyable|@autofiy/property]).+\\.ts$",
        "/node_modules/(?![@autofiy/autofiyable|@autofiy/property]).+\\.tsx$",
    ],
}

将要忽略的包放在[]中，并用|

隔开

就我而言[@autofiy/autofiyable|@autofiy/property]

开玩笑遇到了意外的令牌

4 个答案: