"Encountered an error: 'SyntaxError: Import statement can only be used within a module' while executing a Jest test in Vue Js

After following a tutorial on building a Vue.js component (), I proceeded to follow another tutorial on unit testing the same component (). Unfortunately, the unit test failed at the import statement within the component code, resulting in the following error message:

● Test suite failed to run

C:\Users\SHINIGAMI-ALFSABAH\Documents\Workspace\Dev\Vue\star-rating\node_modules\vue-awesome\icons\star.js:1
({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,global,jest){import Icon from '../components/Icon.vue'
                                                                                         ^^^^^^

SyntaxError: Cannot use import statement outside a module

  12 | 
  13 | <script>
> 14 |     import 'vue-awesome/icons/star'
     | ^
  15 |     import Icon from 'vue-awesome/components/Icon'
  16 | 
  17 |     export default {

  at ScriptTransformer._transformAndBuildScript (node_modules/@jest/transform/build/ScriptTransformer.js:537:17)
  at ScriptTransformer.transform (node_modules/@jest/transform/build/ScriptTransformer.js:579:25)
  at src/components/Rating.vue:14:1
  at Object.<anonymous> (src/components/Rating.vue:67:3)

Any assistance provided would be greatly appreciated.

javascriptunit-testingvue.jsjestjs

Answer №1

While searching for a solution, I came across a helpful answer on Stack Overflow related to an issue similar to mine. The question was about an 'Unexpected token import' error when running Jest tests. You can view the original post here.

The solution involved making a simple change to the transformIgnorePatterns array in my Jest configuration. Initially, it looked like this:

transformIgnorePatterns: ["/node_modules/"],

After implementing the recommended adjustment, it became:

transformIgnorePatterns: ["/node_modules/(?!vue-awesome)"],

This modification ensured that Jest compiled the 'vue-awesome' module correctly for use in the test environment.

Answer №2

My approach involved setting up the necessary dependencies for vue and jest to function harmoniously. This encompassed installing crucial packages and creating configuration files for babel and jest.

//Installing essential dependencies for jest and vue js
npm i -D @vue/test-utils jest vue-jest @vue/babel-preset-app babel-core@^7.0.0-bridge.0


//jest.config.js
module.exports = {
    moduleFileExtensions: ['js', 'jsx', 'json', 'vue'],
    transform: {
        ".*\\.(vue)$": "vue-jest",
        "^.+\\.js$": "<rootDir>/node_modules/babel-jest"
    }
};


//babel.config.js
module.exports = {
    presets: [
        '@vue/app'
    ]
};

Answer №3

In my case, the issue stemmed from a crucial name: field missing in the components, which was resolved by clearing the jest cache.

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