typescript - 找不到相对于目录的预设 "module:metro-react-native-babel-preset"

我正在尝试运行测试套件，但出现以下错误:

Couldn't find preset "module:metro-react-native-babel-preset" relative to directory "/Users/dan/Sites/X"

      at node_modules/babel-core/lib/transformation/file/options/option-manager.js:293:19
          at Array.map (<anonymous>)
      at OptionManager.resolvePresets (node_modules/babel-core/lib/transformation/file/options/option-manager.js:275:20)
      at OptionManager.mergePresets (node_modules/babel-core/lib/transformation/file/options/option-manager.js:264:10)
      at OptionManager.mergeOptions (node_modules/babel-core/lib/transformation/file/options/option-manager.js:249:14)
      at OptionManager.init (node_modules/babel-core/lib/transformation/file/options/option-manager.js:368:12)
      at File.initOptions (node_modules/babel-core/lib/transformation/file/index.js:212:65)
      at File.initOptions (node_modules/ts-jest/dist/util/hacks.js:23:43)
      at new File (node_modules/babel-core/lib/transformation/file/index.js:135:24)
      at Pipeline.transform (node_modules/babel-core/lib/transformation/pipeline.js:46:16)

这是我在jest中的package.json配置:

"jest": {
    "preset": "react-native",
    "moduleFileExtensions": [
      "ts",
      "tsx",
      "js",
      "jsx",
      "json"
    ],
    "transform": {
      "^.+\\.(js)$": "<rootDir>/node_modules/react-native/jest/preprocessor.js",
      "\\.(ts|ts)x?$": "ts-jest"
    },
    "testRegex": "/src/.*.spec.(js|ts|tsx)?$",
    "globals": {
      "ts-jest": {
        "useBabelrc": true
      }
    }
  }

如果需要，这是babelrc的内容

{
  "presets": ["module:metro-react-native-babel-preset"],
  "plugins": [
    [
      "module-resolver",
      {
        "alias": {
          "~": "./src"
        }
      }
    ]
  ]
}

最佳答案

在撰写本文时，This issue保持打开状态。
用户似乎对修复的结果不一，但是这两个对我有用:
选项1:将.babelrc更改为.babelrc.js
只需将.babelrc重命名为.babelrc.js或babel.config.js即可。
不要忘记在文件的开头添加module.exports = 。
这解决了我开玩笑的问题，但为我破坏了其他eslint插件。
选项2:将转换添加到Jest配置
对于选项2，我认为可以通过在所有javascript文件上手动调用react-native预处理程序来解决此问题。

transform: { '^.+\\.js$': '<rootDir>/node_modules/react-native/jest/preprocessor.js' }

如果没有单独的Jest配置文件，则可以将其添加到package.json中，例如...

{
  "jest": {
    "transform": {
      "^.+\\.js$": "<rootDir>/node_modules/react-native/jest/preprocessor.js"
    }
  }
}