Question

我正在尝试开始使用jest并进行快照测试。我实际上已经有了这个工作，我来了，看到了下面的错误，所以我继续阅读并尽可能地升级包，但我仍然得到错误。

Splash.test.js

import { shallow } from 'enzyme';
import shallowToJson from 'enzyme-to-json';
import Splash from './Splash';

it('Splash page is rendered', () => {
    const result = shallow(
        <Splash />,
    );

    expect(shallowToJson(result)).toMatchSnapshot();
});

终端输出

> jest

 FAIL  src/components/Splash/Splash.test.js
  ● Test suite failed to run

    Cannot find module 'enzyme/build/RSTTraversal' from 'shallow.js'

      at Resolver.resolveModule (node_modules/jest-resolve/build/index.js:194:17)
      at Object.<anonymous> (node_modules/enzyme-to-json/shallow.js:15:21)

Test Suites: 1 failed, 1 total
Tests:       0 total
Snapshots:   0 total
Time:        0.83s
Ran all test suites.

大型Package.json

{
  ....
  "scripts": {
    "test": "jest",
  },
  "dependencies": {
    "enzyme": "^2.9.1",
    "react": "^15.5.0",
    "react-addons-test-utils": "^15.5.0",
    "react-css-modules": "^4.1.0",
    "react-dom": "^15.5.0",
    "react-redux": "^5.0.3",
    "react-router": "^4.1.1",
    "react-router-dom": "^4.0.0",
    "react-router-page-transition": "^3.0.2",
    "react-router-redux": "^5.0.0-alpha.6",
    "react-tap-event-plugin": "^2.0.1",
    "react-test-renderer": "^15.5.4",
    "redux": "^3.6.0",
    "webpack": "^2.2.1"
    ......
  },
  "devDependencies": {
    ......
    "babel-cli": "^6.24.0",
    "babel-core": "^6.24.0",
    "babel-jest": "^22.0.6",
    "babel-loader": "^6.4.0",
    "babel-plugin-dynamic-import-node": "^1.1.0",
    "babel-plugin-module-resolver": "^2.7.1",
    "babel-plugin-react-css-modules": "^3.3.0",
    "babel-plugin-transform-react-require": "^1.0.1",
    "babel-plugin-transform-react-stateless-component-name": "^1.1.2",
    "babel-plugin-transform-runtime": "^6.23.0",
    "babel-preset-env": "^1.2.2",
    "babel-preset-es2015": "^6.24.0",
    "babel-preset-react": "^6.23.0",
    "babel-preset-react-hmre": "^1.1.1",
    "babel-preset-stage-0": "^6.24.1",
    "babel-register": "^6.24.1",
    "babel-runtime": "^6.23.0",
    "enzyme-to-json": "^3.3.0",
    "jest": "^22.0.6",
    "jest-cli": "^22.0.6",
    "jest-enzyme": "^4.0.2",
    "react-hot-loader": "^3.0.0-beta.7",
    "redux-actions": "^2.2.1",
    "redux-devtools-extension": "^2.13.2",
    "redux-form": "^6.7.0",
    "redux-logger": "^3.0.0",
    "redux-persist": "^4.8.0",
    "regenerator-runtime": "^0.11.0",
    "require-hacker": "^3.0.0",
    "resolve-url-loader": "^2.0.2",
    "style-loader": "^0.16.0",
    "svg-react-loader": "^0.4.5",
    "url-loader": "^0.5.8",
    "webpack-config": "^7.0.0",
    "webpack-dashboard": "^0.3.0",
    "webpack-dev-server": "^2.4.2"
  },
  ......
  "jest": {
    "setupTestFrameworkScriptFile": "./node_modules/jest-enzyme/lib/index.js",
    "moduleFileExtensions": [
      "js"
    ],
    "moduleDirectories": [
      "node_modules"
    ],
    "testPathIgnorePatterns": [
      "<rootDir>/node_modules/",
      "<rootDir>/app/"
    ],
    "moduleNameMapper": {
      "moduleNameMapper": {
        "\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$": "<rootDir>/__mocks__/fileMock.js",
        "\\.(css|less)$": "identity-obj-proxy"
      }
    },
    "transform": {
      "^.+\\.js$": "babel-jest"
    }
  }
}

Answer 1

当我的酶与酶-json之间的版本不匹配时，我得到了同样的错误。您需要升级酶或将酶降级为json。

我目前在不同的项目中有两种不同的组合：

酶2.8.2＆amp;酶-json 1.5.0

酶3.3.0＆amp;酶-json 3.3.0

Answer 2

尝试将shallowToJson导入替换为：

import { shallowToJson } from 'enzyme-to-json';

由于RSTTraversal不可用，shallow（）失败

2 个答案: