Jest unit tests don't work anymore with React Native 0.56.0

I am migrating React Native from 0.55.3 to 0.56.0 but when I run Jest unit tests (that used to work with RN 0.55.3) I have such errors :

/Users/administrateur/***/***/node_modules/native-base-shoutem-theme/index.js:1
    ({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,global,jest){import connectStyle from "./src/connectStyle";
                                                                                             ^^^^^^

    SyntaxError: Unexpected token import



      at ScriptTransformer._transformAndBuildScript (node_modules/jest-runtime/build/script_transformer.js:403:17)
      at Object.<anonymous> (node_modules/native-base/dist/src/index.js:6:31)
      at Object.<anonymous> (App/Containers/Account/AccountScreen.js:1032:19)

It looks like the problem is Babel (RN 0.56.0 migrated to Babel 7) tries to transform native-base-shoutem-theme files while I added it to transformIgnorePatterns Jest configuration :

  "jest": {
   ...
    "preset": "react-native",
    "transformIgnorePatterns": [
      "node_modules/(?!(jest-)?react-native|react-navigation|native-base-shoutem-theme|native-base)"
    ]
  },

Actually it looks like the Jest transformIgnorePatterns config doesn’t work anymore.

I saw such problems on the web but no solution worked for me.

An extract from my package.json file :

  "devDependencies": {
    "@babel/core": "7.0.0-beta.51",
    "babel-core": "7.0.0-bridge.0",
    "babel-jest": "23.4.2",
    "babel-preset-react-native": "5.0.2",
    "jest": "23.4.2",
  },

Any idea how I could solve this problem ?

[thymikee]

This is an issue with default template from React Native. You need to add babel-core@7.0.0-bridge.0 to your deps and change .babelrc to babel.config.js. Please file an issue in their side or better, send a PR 😃

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