npmjestjs95% confidence\u2191 261

Jest gives an error: "SyntaxError: Unexpected token export"

Full error message

I'm using Jest to test my React app.

Recently, I added DeckGL to my app. My tests fail with this error:

Test suite failed to run

/my_project/node_modules/deck.gl/src/react/index.js:21
export {default as DeckGL} from './deckgl';
^^^^^^

SyntaxError: Unexpected token export

  at ScriptTransformer._transformAndBuildScript (node_modules/jest-runtime/build/script_transformer.js:318:17)
  at Object.<anonymous> (node_modules/deck.gl/dist/react/deckgl.js:9:14)
  at Object.<anonymous> (node_modules/deck.gl/dist/react/index.js:7:15)

This looks like an issue with Jest transforming a node module before running it's tests.

Here is my .babelrc:

{
  "presets": ["react", "es2015", "stage-1"]
}

Here is my jest setup:

"jest": {
    "testURL": "http://localhost",
    "setupFiles": [
      "./test/jestsetup.js"
    ],
    "snapshotSerializers": [
      "<rootDir>/node_modules/enzyme-to-json/serializer"
    ],
    "moduleDirectories": [
      "node_modules",
      "/src"
    ],
    "moduleNameMapper": {
      "\\.(css|scss)$": "<rootDir>/test/EmptyModule.js"
    }
  },

I seem to have the correct things necessary to transform export {default as DeckGL }. So any ideas whats going wrong?

Solutionsource: stackoverflow \u2197

This means, that a file is not transformed through TypeScript compiler, e.g. because it is a JS file with TS syntax, or it is published to npm as uncompiled source files. Here's what you can do. Adjust your transformIgnorePatterns allowed list: { "jest": { "transformIgnorePatterns": [ "node_modules/(?!@ngrx|(?!deck.gl)|ng-dynamic)" ] } } By default Jest doesn't transform node_modules, because they should be valid JavaScript files. However, it happens that library authors assume that you'll compile their sources. So you have to tell this to Jest explicitly. Above snippet means that @ngrx, deck and ng-dynamic will be transformed, even though they're node_modules.

API access

Get this solution programmatically \u2014 free, no authentication.

curl https://depscope.dev/api/error/099356220128d602485ac33770ed801494a6067a8ed797e579140361ca3f82ed

hash \u00b7 099356220128d602485ac33770ed801494a6067a8ed797e579140361ca3f82ed

Jest gives an error: &quot;SyntaxError: Unexpected token export&quot;

Jest gives an error: "SyntaxError: Unexpected token export"