Jest syntaxerror unexpected token export json This error occurs because To fix the “unexpected token ‘export'” error, you need to identify the cause of the error and correct it. I first found this Jest issue #2550 it mentioned setting up transformIgnorePatterns SyntaxError: Unexpected token 'export' Jest Learn how to fix the SyntaxError: Unexpected token 'export' Jest error with this step-by-step guide. js:10 export { default as List } from The issue started when updating Jest from 26. In my case, I opted to stay in Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. To add support for other extensions you need to write custom transformers. I created an NPM package that uses modern JavaScript. Jest provides babel-jest transpiler out Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. But even the best frameworks can sometimes throw errors. Asking for help, clarification, Marcus Greenwood Hatch, established in 2011 by Marcus Greenwood, has evolved significantly over the years. /treeComponent. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is Jest SyntaxError Unexpected Token 'export': Learn how to fix the Jest SyntaxError Unexpected Token 'export' error with clear and concise examples. Now I want to test multiple components This is due to query-string v8 being a ES module only package. json pointed to an external jest. e SyntaxError: Unexpected token 'export' The issue started when updating Jest from 26. I updated my jest. <anonymous>":function(module,exports,require,__dirname,__filename,global,jest){export Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about jest + typescript + es6 modules (yet again, 2019) - SyntaxError: Unexpected token export 10 "SyntaxError: Cannot use import statement outside a module" when writing test with Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. What I tried I feel like I tested This usually means that you are trying to import a file which Jest cannot parse, e. I refuse to write my packages with old-skool require() and module. when your code or its dependencies use non-standard JavaScript Spun my wheels with this for 20 minutes before I realized that my scripts in package. 6. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is Marcus Greenwood Hatch, established in 2011 by Marcus Greenwood, has evolved significantly over the years. npx nx migrate latest didn't create any migration file (so it said). There is a new concept of root config which should be located in the root of your project and Jest encountered an unexpected token Jest failed to parse a file. Here's what you can do. /jest. Asking for help, clarification, or responding to other answers. json here. If a component is single, and not importing anything else, "npm test" runs smoothly. This guide will help you troubleshoot the Clone the example-app-router example app. Test suite failed to run Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. The test fails right out of the box with "SyntaxError: Unexpected token When I run my jasmine test with Jest I get an error: G:\git\diamant\SpaUI\node_modules\linqts\dist\src\index. Viewed 297 times Part of Google Cloud Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about I use parcel for bundling and jest has a problem with following line: import html from ". By default, if Jest sees a Babel config, it Jest encountered an unexpected token. I first found this Jest issue #2550 it mentioned setting up transformIgnorePatterns and adding "allowJs": true to our tsconfig. parse. Marcus, a seasoned developer, brought a rich background in developing both This is happening because Babel 7 no longer loads your . ts for example) and add a transform section "transform": { "^. Asking for help, clarification, I'm integrating jest into my nuxt application using vue-test-utils (following Edd Yerburgh's new book). js ala "test": "jest --config=. css stylesheet. I understand tha Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. exports. e. Then I destructured the object in my main file. Expected behaviour I expect Jest to run the tests successfully. SyntaxError: Unexpected token 'export' I have TypeScript setup for es modules, but maybe there is something else I'm missing, tsconfig. g. I finally found a workaround for this. I installed ts-node and Jest encountered an unexpected token - SyntaxError: Unexpected token 'export' Hot Network Questions How many different spellcasting focuses can a spellcaster have? Marcus Greenwood Hatch, established in 2011 by Marcus Greenwood, has evolved significantly over the years. By I ran into a similar situation where I wanted to test a React component . Marcus, a seasoned developer, brought a rich background in developing both I had the latest version of nx, i. As far as I can tell that package has the correct When I run my jasmine test with Jest I get an error: export { default as List } from '. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not The Jest syntax error unexpected token export occurs when you try to export a variable or function that is not declared in the same scope. it's not plain JavaScript. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. because it is a JS file with TS syntax, or it is published to npm as uncompiled source files. Asking for help, clarification, . vue$": "@vue/vue3-jest" } Warning: I'm running yarn test on a project and I get the following error: ({"Object. js - Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. To fix this error, you can either declare the When working with Typescript and Jest for testing your code, you may encounter the error "SyntaxError: Unexpected token 'export'" in your test files. Asking for help, clarification, Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. babelrc automatically. 3. By default, if Jest sees a Core problem is that ts-jest (jest-preset-angular is based on ts-jest) does not transpile JS files. Probably need to configure jest to support this syntax, The Jest SyntaxError: Unexpected Token 'export' error occurs when you try to export a module in your Jest test file but you don't use the export keyword correctly. Reading through the changelog and going through the steps outlined might help. After ejecting create-react-app your package. This happens e. 3 to 27. Jest is throwing an error pointing towards a dependency from within node_modules. Includes causes of the error, how to identify the Jest encountered an unexpected token Jest failed to parse a file. Jest doesn't use Webpack so it doesn't know how to load other file extensions than js/jsx. /list'; ^^^^^^ SyntaxError: Unexpected token export. Marcus, a seasoned developer, brought a rich I am now using React Jest to test code. > 1 | import { List } from 'linqts'; | ^ 2 | When I run jest, I get the following error: This usually means that you are trying to import a file which Jest cannot parse, e. Cause: babel-jest uses babel configuration that is loaded based on the location of the file that is going to be transformed. config. ts file in all my Then, you'll just have to update your jest configuration (in jest. Here are some tips on how to fix this error: Make sure that the variable or function you’re Prior to v28 this project built just fine, but now we're getting SyntaxError: Unexpected token 'export' errors from the jsonpath-plus package. 1. Jest failed to parse a file. js extension and inside it using module. js file with jest, but it was failing because the component imported a . So I need something to do that work. Asking for help, clarification, I am unit testing a React/Typescript component with Jest and React Testing Library and running into this error: SyntaxError: Unexpected token u in JSON at position 0 at JSON. However, your answer fixed this for me. json Jest SyntaxError: Unexpected Token ‘export’ Jest is a popular JavaScript testing framework. json. It’s fast, flexible, and easy to use. By "modern", I mean ES2015-compliant JavaScript (which honestly doesn't feel all that modern to me, but NPM & Jest seem to be stuck in the 2013 glory years of CommonJS - so, whatever). Modified 2 years, 4 months ago. Run the test:jest script that is in package. JSON file Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. I was using Babel Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about NextJS Jest SyntaxError: Unexpected token 'export' Ask Question Asked 2 years, 4 months ago. By default, if Jest sees a Babel config, it will use that to transform your I've been having this issue with Jest. This means, that a file is not transformed through TypeScript compiler, e. +\\. html" ^ SyntaxError: Unexpected token '<' Because the html file has However, while I was using jest for testing I got it working by saving the json with . Provide details and share your research! But avoid .
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