javascript - 找不到模块 'setupDevtools' React-Native

Question

我收到以下错误:

Cannot find module 'setupDevtools' from 'setup.js'

  at Resolver.resolveModule (node_modules/jest-resolve/build/index.js:169:17

我的 JSON.package 文件如下所示:

{
  "name": "MiBase",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node node_modules/react-native/local-cli/cli.js start",
    "test": "jest"
  },
  "dependencies": {
    "babel-preset-env": "^1.7.0",
    "i": "^0.3.6",
    "jest-react-native": "^18.0.0",
    "react": "16.3.1",
    "react-native": "0.55.3",
    "react-native-datepicker": "^1.7.2",
    "react-native-image-picker": "^0.26.7",
    "react-native-ui-xg": "0.0.6",
    "react-navigation": "^1.5.11"
  },
  "devDependencies": {
    "babel-jest": "^22.4.3",
    "babel-preset-react-native": "3.0.0",
    "jest": "22.4.3",
    "react-test-renderer": "^16.3.1"
  },
  "jest": {
     "preset": "react-native",
     "moduleNameMapper": {
     "\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$": "<rootDir>/__tests__/loginTest.js",
     "\\.(css|sass)$": "<rootDir>/__tests__/loginTest.js"
   },
   "transformIgnorePatterns": [
     "node_modules"
   ],
   "coveragePathIgnorePatterns": [
     "node_modules"
   ],
     "modulePathIgnorePatterns": [
     "node_modules"
   ]
 }

我的测试文件如下所示:

// __tests__/loginTest.js
import 'react-native';
import React from 'react';
import HomeSreen from '../App';

import renderer from 'react-test-renderer';

test('renders correctly', () => {
  const tree = renderer.create(<LoginScreen />).toJSON();
  expect(tree).toMatchSnapshot();
});

我对 React Native 非常陌生，甚至对使用它进行测试也很陌生。我所学到的或试图解决这个问题的一切都来自这三个地方:

https://facebook.github.io/jest/docs/en/tutorial-react-native.html Jest Cannot find module 'setupDevtools' from 'setup.js' Jest - Cannot find module 'setupDevtools' from 'setup.js'

我在类中还有其他函数，目前我不想测试这些函数。我只是想测试 GUI 功能并且一切都正确显示。这些函数用于处理 http 响应和 JSON 解析。

Answer 1

在我的例子中，我使用 TypeScript，我遇到了同样的错误，并使用以下 package.json 配置修复它:

"dependencies": {
    "react": "^16.3.0-alpha.1",
    "react-native": "0.54.3"
},
"devDependencies": {
    "@types/jest": "^22.2.2",
    "@types/react": "^16.0.41",
    "@types/react-native": "^0.52.19",
    "@types/react-test-renderer": "^16.0.1",
    "babel-jest": "22.4.3",
    "babel-preset-react-native": "4.0.0",
    "jest": "22.4.3",
    "react-addons-test-utils": "^15.6.2",
    "react-native-mock": "^0.3.1",
    "react-native-typescript-transformer": "^1.2.3",
    "react-test-renderer": "^16.3.0-alpha.1",
    "ts-jest": "^22.4.2",
    "typescript": "^2.8.1"
},
"jest": {
    "preset": "react-native",
    "moduleFileExtensions": [
        "ts",
        "tsx",
        "js"
    ],
    "transform": {
        "^.+\\.(js)$": "<rootDir>/node_modules/babel-jest",
        "\\.(ts|tsx)$": "<rootDir>/node_modules/ts-jest/preprocessor.js"
    },
    "testRegex": "(/__tests__/.*|\\.(test|spec))\\.(ts|tsx|js)$",
    "testPathIgnorePatterns": [
        "\\.snap$",
        "<rootDir>/node_modules/",
        "<rootDir>/lib/"
    ],
    "cacheDirectory": ".jest/cache"
}

您可以在 this repo 上找到此配置

希望对您有所帮助。