Happens both on my build and on a fresh expo init
build. In my build it just complains about version numbers. In fresh expo init, it complains about /node_modules/react-native/jest/mockComponent.js
having unexpected tokens at static displayName = 'Component';
Requires Babel "^7.0.0-0", but was loaded with "6.26.3". If you are sure you have a compatible version of @babel/core, it is likely that something in your build process is loading the wrong version. Inspect the stack trace of this error to look for the first entry that doesn't mention "@babel/core" or "babel-core" to see what is calling Babel. (While processing preset: "/node_modules/babel-preset-expo/index.js")
at throwVersionError (node_modules/@babel/helper-plugin-utils/lib/index.js:65:11)
at Object.assertVersion (node_modules/@babel/helper-plugin-utils/lib/index.js:13:11)
at _default (node_modules/@babel/plugin-proposal-decorators/lib/index.js:35:7)
at node_modules/@babel/helper-plugin-utils/lib/index.js:19:12
at Function.memoisePluginContainer (node_modules/babel-core/lib/transformation/file/options/option-manager.js:113:13)
at Function.normalisePlugin (node_modules/babel-core/lib/transformation/file/options/option-manager.js:146:32)
at node_modules/babel-core/lib/transformation/file/options/option-manager.js:184:30
at Array.map (<anonymous>)
at Function.normalisePlugins (node_modules/babel-core/lib/transformation/file/options/option-manager.js:158:20)
at OptionManager.mergeOptions (node_modules/babel-core/lib/transformation/file/options/option-manager.js:234:36)
at node_modules/babel-core/lib/transformation/file/options/option-manager.js:265:14
at node_modules/babel-core/lib/transformation/file/options/option-manager.js:323:22
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 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)
{
"name": "...",
"main": "./node_modules/expo/AppEntry.js",
"scripts": {
"start": "expo start",
"android": "expo start --android",
"ios": "expo start --ios",
"eject": "expo eject",
"test": "jest",
"testwatch": "jest --watch"
},
"devDependencies": {
"babel-plugin-transform-remove-console": "^6.9.4",
"babel-preset-expo": "^5.0.0",
"eslint": "^5.2.0",
"eslint-config-airbnb": "^17.0.0",
"eslint-config-expo": "^6.0.0",
"eslint-plugin-import": "^2.13.0",
"eslint-plugin-jsx-a11y": "^6.1.1",
"eslint-plugin-react": "^7.10.0",
"eslint-plugin-react-native": "^3.2.1",
"jest-expo": "^31.0.0",
"jest-fetch-mock": "^1.7.5",
"prettier": "^1.13.7",
"react-test-renderer": "16.2.0"
},
"jest": {
"preset": "jest-expo",
"verbose": true
},
"dependencies": {
"expo": "^31.0.4",
"react": "16.5.0",
"react-native": "https://github.com/expo/react-native/archive/sdk-31.0.1.tar.gz",
"react-native-app-link": "^0.4.1"
}
}
Fresh install throws errors about Jest’s mockComponent.js
https://github.com/expo/expo/issues/2950