Question

我在尝试运行测试用例代码时遇到错误。我正在使用本机与jest进行反应。在升级0.40之前一切正常。现在是0.42我的所有测试用例都停止工作，并在出错后收到错误。

({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,global,jest){import React, { Component, Children, PropTypes } from 'react';
                                                                                             ^^^^^^
    SyntaxError: Unexpected token import

      at transformAndBuildScript (node_modules/jest-runtime/build/transform.js:320:12)
      at Object.<anonymous> (node_modules/react-native-root-siblings/lib/AppRegistryInjection.js:3:22)
      at Object.<anonymous> (node_modules/react-native-root-siblings/lib/SiblingsManager.js:3:27)

这是我的 .babelrc 代码

{
    "presets": [
        "react-native"
    ],
    "plugins": [
        "transform-decorators-legacy"
    ]
}

我没有得到什么问题。

Answer 1

我遇到了与0.42相同的问题。在我逐个找到解决方案之前，我猛地摇头。

您需要在 package.json 中编写忽略。我的例子：

"jest": {
        "preset": "react-native",
        "setupFiles": [
            "<rootDir>/src/config/jest.js"
        ],
        "transformIgnorePatterns": [
            "<rootDir>/(node_modules)/(?!react-native|react-navigation|bugsnag-react-native)"
        ],
        "transform": {
            "^.+\\.js$": "<rootDir>/node_modules/babel-jest"
        }

我的 /config/jest.js 看起来像是：

jest.mock('Linking', () => ({
  addEventListener: jest.fn(),
  removeEventListener: jest.fn(),
  openURL: jest.fn(),
  canOpenURL: jest.fn(),
  getInitialURL: jest.fn().mockImplementation(() => new Promise((resolve) => resolve()))
}));

jest.mock('mobx-react/native', () => require('mobx-react/custom'));
jest.mock('react-native-mixpanel', () => ({
  sharedInstanceWithToken: jest.fn(),
  trackWithProperties: jest.fn()
}));
jest.mock('bugsnag-react-native', () => ({
  Client: jest.fn(),
  Configuration: jest.fn()
}));

我无法保证这会直接解决您的所有问题。但是，我们的想法是忽略所有“恶意者”（在您的情况下 react-native-root-siblings ），从而避免出现此类错误消息。

Answer 2

我得到了解决方案

"jest": {
        "preset": "react-native",
        "transformIgnorePatterns": [
          "node_modules"
        ],
        "coveragePathIgnorePatterns": [
          "node_modules"
        ],
        "modulePathIgnorePatterns": [
          "node_modules"
        ]
      },

在我的 devDependencies 中我添加了"react-addons-test-utils"， "react-dom"，

"devDependencies": {
    "babel-core": "^6.17.0",
    "babel-eslint": "^7.2.1",
    "babel-jest": "^19.0.0",
    "babel-loader": "^6.2.5",
    "babel-plugin-transform-decorators": "^6.13.0",
    "babel-plugin-transform-decorators-legacy": "^1.3.4",
    "babel-preset-es2017": "^6.16.0",
    "babel-preset-react": "^6.16.0",
    "babel-preset-react-native": "^1.9.1",
    "babel-preset-stage-0": "^6.16.0",
    "enzyme": "^2.8.0",
    "jest": "^19.0.2",
    "npm": "^4.4.4",
    "react-addons-test-utils": "^15.4.2",
    "react-dom": "^15.4.2",
    "react-test-renderer": "^15.4.2"
}

这解决了所有问题。

用React Native来解决问题

2 个答案: