Jest - SyntaxError: Cannot use import statement outside a module

问题

I am using jest:24.9.0 without any configuration, installed globally from a create-react-app. Inside these files I am using es6 modules. There is no error when using "test": "react-scripts test"

However when I move to use jest with "test": "jest --config jest.config.js", I see the below error.

 FAIL  src/configuration/notifications.test.js
  ● Test suite failed to run

    /var/www/management/node/src/configuration/notifications.test.js:1
    ({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,global,jest){import notifications from './notifications';
                                                                                             ^^^^^^

    SyntaxError: Cannot use import statement outside a module

回答1:

Jest doesn't support ES6 module and hence throwing this error when you directly run the test with Jest. if you want to run like that then you have to add babel.

On the other side, when you run the test with react-scripts it uses babel behind the scene to Transpile the code.

Hope this answer your question.

来源：https://stackoverflow.com/questions/59879689/jest-syntaxerror-cannot-use-import-statement-outside-a-module