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无法在我的 react-native 项目上运行。

尝试在 react-native 项目上设置 jest 时，出现以下错误：

<project_root>\node_modules\react-native\Libraries\polyfills\error-guard.js:14
type ErrorHandler = (error: mixed, isFatal: boolean) => void;
     ^^^^^^^^^^^^

SyntaxError: Unexpected identifier

  at Runtime._execModule (node_modules/jest-runtime/build/index.js:1157:58)
  at Object.<anonymous> (node_modules/react-native/jest/setup.js:16:6)

看来我的笑话运行 react-native's jest/setup.js。并且由于“类型”（流关键字）而无法编译它的依赖关系。

我将 jest-expo（版本 42.0.1）与 babel-jest 一起使用，并按此处 babel-plugin-transform-flow-strip-types所述添加。

我尝试了很多解决方案。一种是自己编译这些流文件，并使用 jestmoduleNameMapper将它们替换为 react-native 的。但这引起了更多问题...

我开玩笑的配置package.json：

 "jest": {
"preset": "jest-expo",
"setupFilesAfterEnv": [
  "@testing-library/jest-native/extend-expect"
],
"moduleNameMapper": {
  "@react-native-firebase/analytics$": "<rootDir>/__mocks__/@react-native-firebase/analytics.js"
},
"transformIgnorePatterns": [
  "rootDir>/node_modules/(?!(jest-)?react-native|react-clone-referenced-element|@react-native-community|expo(nent)?|@expo(nent)?/.*|react-navigation|@react-navigation/.*|@unimodules/.*|unimodules|sentry-expo|native-base|@sentry/.*)",
  "<rootDir>/node_modules/(?!expo-image-manipulator|@react-native|@react-native-firebase/analytics|@unimodules/)",
  "<rootDir>/node_modules/(?!expo-facebook)"
],
"collectCoverage": false,
"setupFiles": [
  "./jestSetup.js"
],
"collectCoverageFrom": [
  "**/*.{js,jsx}",
  "!**/coverage/**",
  "!**/node_modules/**",
  "!**/babel.config.js",
  "!**/jest.setup.js"
]

}

我的babel.config.js：

module.exports = function (api) {
   api.cache(true);
   return {
   presets: ["babel-preset-expo"],
   plugins: ["@babel/plugin-transform-flow-strip-types"],
   };
};

我会非常感谢你的帮助。

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0 回答 0