- Jest encountered an unexpected token export react or search How to resolve unexpected tokens in TypeScript. json to have "test": "react-scripts test" or replacing "jest" with "react-scripts test" under scripts just like this: package. By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules". Jan 14, 2021 · Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. js:. Modified 5 years, 11 months ago. 34. You signed out in another tab or window. It collects links to all the places you might be looking at while hunting down a tough bug. 1. Jest encountered an unexpected token because trying to import a file which Jest cannot parse. This did not work, what did solve it in the end was adding the following to our jest. Ask Question Asked 5 years, 11 months ago. Feb 3, 2022 · Jest - SyntaxError: React Navigation - Unexpected token export for [node_modules\react-navigation\src\react-navigation. Use the <rootDir> string token to include the path to your project's root directory to prevent it from accidentally ignoring all of your files in different environments that may have different root directories. 13. Jan 25, 2017 · I am now using React Jest to test code. when your code or its dependencies use non-standard Sep 4, 2019 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. json, I have the failing test: FAIL src/tests/index. TypeScript Jest: Unexpected Token Export I'm trying to run unit tests for a TypeScript project which uses another TypeScript project I've created as a dependency. Viewed 10k times Jest encountered an unexpected token: What it is and how to fix it. Unexpected token 'export' > 2 | import { Swiper, SwiperSlide } from 'swiper/react'; Jest encountered an Feb 9, 2024 · Jest encountered an unexpected token. Nov 4, 2021 · The issue started when updating Jest from 26. Transform react-markdown (and its dependencies) using babel-jest (solution for CRA 4. ":function(module,exports,require,__dirname,__filename,jest){export { DemoContainer, DemoItem } from '. "^lodash-es$": "lodash" Feb 23, 2021 · If you Google "jest unexpected token", there are several signs that this is a really nasty issue: There are a great many threads on the issue - on Stack Overflow and otherwise. create-react Oct 14, 2024 · In my project I was upgraded nodejs version to 20 and after that test cases failed. 0. It’s known for its simplicity and speed, making it a great choice for testing both small and large projects. This means that a file is not transformed through TypeScript compiler, e. 10. Jan 31, 2023 · Jest encountered an unexpected token Jest failed to parse a file. Nov 23, 2021 · It seems that it has less to do with the version of the dependencies. All the solutions are about installing ts-jest and babel I created my pr. The threads span a number of years - meaning that the issue keeps cropping up for people repeatedly. com Jest SyntaxError: Unexpected token 'export' Apr 22, 2022 Copy link tyler-dane commented Apr 22, 2022 Feb 17, 2022 · Jest encountered an unexpected token Jest failed to parse a file. Nov 30, 2022 · You signed in with another tab or window. js to . Jul 9, 2019 · Trying to set up Jest to test my React components (Technically I'm using Preact) but same idea Anytime I try to get a coverage report, I get errors when it hits any jsx syntax. Nov 16, 2019 · Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. js altered with the new transformIgnorePatterns and transform configurations. module. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax. Tried few solutions, Which are posted on StackOverFlow but none worked for me. json. Apr 7, 2020 · Jest公式によると、react-nativeに組み込まれたJestプリセットにはデフォルトのモックが付属しているものの、いくつかのコンポーネントにはそれが無く、ネイティブコードに依存しているためマニュアルでモック化する必要があるとかなんとか FAIL src/index. Marcus, a seasoned developer, brought a rich background in developing both B2B and consumer software for a diverse range of organizations, including hedge funds and web agencies. Nov 10, 2022 · I have searched 3 days about fixing this problem in my React app, I have read a lot of similar topics and could not fix it. js, and the last one was close but I was still missing one important thing the imports. エラー元の tsconfig というパッケージについて調べたら TypeScript 公式のものではなく、しかも 3 年前から更新されていませんでした。 Feb 11, 2019 · For those that travelled this far. By making it "^uuid$" this started working for me. Jest encountered an unexpected token ReactJS. Jest is a popular JavaScript testing framework. Modified 5 years, 7 months ago. ' Try npm test and note that tests fail with SyntaxError: Unexpected token export; Note that you can get jest to run and the tests to pass by: changing the absolute import on line 5 of App. I am struck here, Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Mar 13, 2023 · Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. My case was module federation shared dependencies caused a legacy package's css not to get picked up. config. Jest encountered an Jun 20, 2022 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. I. Dec 23, 2020 · but Jest doesn't like it and throws a SyntaxError: Unexpected token 'export' I tried different things, like play around with . This usually means that you are trying to import a file which Jest cannot parse, e. g. Aug 26, 2022 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand May 7, 2024 · Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. json . ts Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. david-wb changed the title Jest SyntaxError: Unexpected token 'export' site:stackoverflow. Apr 22, 2019 · Sorry for unclear answer, I meant that, the line of code where Jest fails on, is part of react-navigation-tabs library, not my code; But where my code, needs and imports it, there is not any issues with jest, so, Jest does work in my files but fails on the sub-libraries (I can not just remove all my usages of external libraries, specially this one is required for the tabs of the application) So, finally i've solved this. babelrc and some dependencies, moduleNameMapper and transformIgnorePatterns in jest. Component { ^^^^^ SyntaxError: Unexpected token export at transformAndBuildScript (node_modules\jest-runtime\build\transform. Jun 27, 2023 · Configuring transformIgnorePatterns: To address unexpected token errors in Jest, the transformIgnorePatterns option plays a crucial role. In this guide, we’ll walk through setting up… Nov 13, 2020 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Feb 16, 2020 · React Jest causing "SyntaxError: Unexpected token . Nov 24, 2024 · Jest encountered an unexpected token Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. test. I updated my jest. When I run jest, I get the following error: Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. js file to ensure that the transform configuration for Typescript files is properly set up. Dec 26, 2023 · Marcus Greenwood Hatch, established in 2011 by Marcus Greenwood, has evolved significantly over the years. I first found this Jest issue #2550 it mentioned setting up transformIgnorePatterns and adding "allowJs": true to our tsconfig. I'm using Jest to test my React app. Have you configured jest together with react-testing-library and now gotten Jest SyntaxError: Unexpected token 'export' when building? I tried multiple things, like modifying . ts file and the quotes kept getting stripped off "uuid" and the fix didn’t work. However mine was fixed by just modifying package. Recently, I added DeckGL to my app. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not Dec 1, 2022 · Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. js:5 export default class FaAngleDown extends React. , it's not plain JavaScript. Jan 21, 2025 · You signed in with another tab or window. While using old babel version everything worked fine, but because of some project problems we had to upgrade babel to 7 Apr 15, 2023 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. <anonymous> (src\components\category-tree\category-tree. Mar 14, 2019 · jyurek changed the title Jest encountered an unexpected token Jest you need to read the guide on the jest docs for how to use jest with react-native. Oct 21, 2020 · I can't get my tests to run. Jan 18, 2020 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. The Error Feb 20, 2024 · $ npx jest FAIL . exports = { presets: ['@babel/preset-env', '@babel/preset-react'], }; package. yarn add --dev babel-preset-env Mar 11, 2019 · The only way I could get this to work for myself was to add: { "targets": { "node": "current" } } So that my presets read: You signed in with another tab or window. You might be safe if you use "!node_modules/lodash-es" in your transformIgnorePatterns instead so that jest runs babel on lodash-es only. you’ve probably encountered the dreaded “unexpected token ‘export I was able to get this working by doing the following: Added NODE_OPTIONS=--experimental-vm-modules to the test script in package. Sep 10, 2020 · SyntaxError: Unexpected token 'export' Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. You switched accounts on another tab or window. jsx'] to jest. 6. I managed to solve it by installing the below presets and having the babel configuration file as follows: Jan 31, 2019 · I ran into a similar situation where I wanted to test a React component . Mar 2, 2018 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Feb 14, 2022 · 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. Try Teams for free Explore Teams Jest unexpected token 'export': How to fix Jest is a popular JavaScript testing framework. 3 to 27. npx nx migrate latest didn't create any migration file (so it said). Jest encountered an unexpected token Jest failed to parse a file. SyntaxError: Unexpected token '. <anonymous> (src\components\category\category. it's not plain Aug 10, 2023 · Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Mar 13, 2023 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Sep 24, 2019 · Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. " Babel7 Jest unexpected token export. Feb 8, 2023 · Test suite failed to run, Jest encountered an unexpected token Hey everyone, I recently imported the @FluentUI\react-charting module into my UX code so I could create a sparkline chart, and everything compiles and renders correctly. Choosing the Right Transformer You can use babel-jest or ts-jest as a transformer: Using babel-jest as the Transformer You should use babel-jest Aug 1, 2022 · Add a transform for js which uses babel-jest-- Jest encountered an unexpected token - SyntaxError: Unexpected token 'export' Update my tsconfig to output commonJS modules Update my tsconfig to allowJs:true and update my jest transforms to parse JS with ts-jest Nov 19, 2023 · Ask questions, find answers and collaborate at work with Stack Overflow for Teams. 3. css stylesheet. Jest SyntaxError: Unexpected Token ‘export’ Jest is a popular JavaScript testing framework. Incorrect Jest Configuration: Ensure that your Jest configuration is set up correctly to work with Typescript files. Dec 29, 2019 · I am building an expo react-native app with expo SDK 36. Sep 29, 2024 · For those who have struggled with Jest configuration issues and the previous solutions did not resolve the problem, here’s a working solution: Update your jest. Jun 10, 2021 · With Konva and react-konva installed and imported, my jest@enzyme tests failed to run with this error: Test suite failed to run Jest encountered an unexpected token This usually means that you are Aug 2, 2022 · I was using a jest. 34 Jul 1, 2021 · Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. 5. js:1 ({"Object. E:\Git\node_modules@mui\x-date-pickers\internals\demo\index. There are several changes that I needed to get this to work. The example from Sushruth resolves the issue. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your May 21, 2023 · Linting and code formatting are essential for maintaining a clean and consistent codebase. Jun 20, 2023 · To resolve the issue where Jest fails due to an unexpected token on the opening < of a JSX tag, it often comes down to setting the right React runtime. js 运行报错：Error: Export encountered errors on following paths 的错误处理; Jest 和 Jest CLI：使用 Jest CLI 进行测试; 在 Jest 测试中如何使用 Jest-Extended 来扩展 Jest 的断言？ Jul 14, 2023 · Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. js has been altered during migration, but the the projects in the workspace have not had their jest. x of jest so I think since I'm just now upgrading from 27. json: SyntaxError: Unexpected token 'export' on '@react-navigation' 2. As of Aug 23, 2022 the latest version of uuid is still beta and the linked not above indicates it was only tested with the beta 29. js file to include transformIgnorePatterns: Aug 31, 2023 · When I try to run a test using MsalReactTester, I get the following error: Jest failed to parse a file. Sep 23, 2024 · I've encountered similar errors before, so here are my thoughts: That's good that you have the ResizeObserver mocked and it's in your setupFiles (that's often forgotten to add it there). Asking for help, clarification, or responding to other answers. And I tried with many solution with jest config, but it didn't work unless and until I have created jest. Aug 25, 2019 · 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. Jest encountered an unexpected token when testing react-native with jest. Nov 6, 2023 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Aug 17, 2021 · Option 3: If you still want to make jest run react-markdown's code. babelrc file, you want something like this: May 10, 2022 · React Jest tests fails with react-dnd: SyntaxError: Unexpected token 'export' Unexpected token 'export' Jest encountered an unexpected token. 3) (credit to How to set transformIgnorePatterns to fix "Jest encountered an unexpected token" nrwl/nx#812 (comment)) Update Aug 19, 2022: Add dependency "trim-lines" 我正在使用 jest 来测试反应 typescript 应用程序。 这是我正在运行的测试： 这是我得到的错误： 我理解这是因为我使用的库 react markdown 没有预编译的源代码。 Issue : I am using ts-jest to test my typescript library. . Oct 7, 2018 · FAIL src/tests/ArticleService. May 1, 2023 · Jest encountered an unexpected token Jest failed to parse a file. component. Aug 9, 2023 · Jest encountered an unexpected token Jest failed to parse a file. Mar 20, 2019 · Jest encountered an unexpected token React. Sep 15, 2024 · Sentry Answers > React > Jest encountered an unexpected token - SyntaxError: Unexpected token 'export' Jest encountered an unexpected token Jest failed to parse a Jul 19, 2024 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Jun 28, 2024 · Jest encountered an unexpected token. /example. But even the best frameworks can sometimes throw errors. it's not pla Feb 10, 2022 · Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. Nov 19, 2020 · Jest encountered an unexpected token. it's not plain JavaScript. By configuring this option correctly, we can exclude Marcus Greenwood Hatch, established in 2011 by Marcus Greenwood, has evolved significantly over the years. Sep 25, 2020 · このカンマを削除したところ、無事にテストが実行できました。めでたしめでたし。 余談. js:21 export {d In this case, lodash-es specifically exports es modules, so you HAVE to let jest transform that code. It’s fast, flexible, and easy to use. The first method works if for some reason you have to import a css file from node_modules directly. Provide details and share your research! But avoid …. Aug 4, 2020 · Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. when your code or its dependencies use non-standard JavaScript syntax, or w Feb 3, 2023 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Mar 22, 2023 · Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Here's what you can do: Sep 15, 2024 · When running the Jest JavaScript testing framework in a React app, you may encounter an error such as the following: Jest failed to parse a file. js file with jest, but it was failing because the component imported a . /DemoContainer'; Test suite failed to run. js:284:10) at Object. To do this, try configuring @babel/preset-react with runtime: "automatic" (and installing @babel/preset-react if needed). Aug 29, 2022 · 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. Now I want to test multiple components together, and I immedia Jul 3, 2023 · Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Apr 26, 2022 · I'm trying to set up a new project, and simply adding these give me an error: import { configure } from "enzyme"; import Adapter from "enzyme-adapter-preact-pure"; configure({ adapter: new Adapter( Jan 27, 2021 · Skylerdw changed the title Jest encountered an unexpected token Jest encountered an Importing PDF and Document directly from 'react-pdf' works in Jest, but fails May 9, 2020 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Jest was configured and the **last pipeline on dev was able to run test, However, if I clone now, even if I have a package-lock. Oct 3, 2021 · I am trying to test my react component with jest but when I try to run it, it's giving me this error: Jest encountered an unexpected token Jest failed to parse a file. If none of the other solutions worked for you, you can try this in your jest. /common/model/MyModel'; Stuck on an issue? Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. Sep 3, 2020 · Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. js 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. ts is still using babel-jest which breaks import/export and the globals/tsconfig path isn't getting generated so jest types aren't recognized. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. js: Apr 3, 2019 · create-react-app jest encountered unexpected token {Ask Question Asked 5 years, 11 months ago. This is one method of resolving unexpected tokens in TypeScript. js:1] 0 Cannot use import statement outside a module with date-fns in Jest after updating to Angular 13 Oct 31, 2024 · Common Causes of Unexpected Token Errors in Typescript Jest. I was using Babel with Webpack. Sep 5, 2018 · So I'm trying to write tests on my React Native app with Jest and TypeScript. Sep 16, 2022 · Current Behavior The error Jest encountered an unexpected token when writing a test for a library that depends on another library, coming from the export statement Oct 17, 2018 · I have the same problem for a few days and tried different solutions but they doesn't work for me. So the final fix was: Update the imports Mar 21, 2019 · Jest encountered an unexpected token, when import new libraries in react } } export default App; [React]Jest SyntaxError: Unexpected token import. Jun 29, 2022 · Jest test 'unexpected token export' 252 Jest gives an error: "SyntaxError: Unexpected token export" Jest encountered an unexpected token React. Dec 23, 2022 · Jest encountered an unexpected token with SwiperJs. I finally found a workaround for this. The global jest. Aug 21, 2024 · Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. component Oct 30, 2023 · Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Aug 9, 2023 · - React and Typscript with Jest and React-testing-Library. This happens e. My final configs are: babel. gl/src/react/index. exports = { env: { test: { presets: [ [ '@babel/preset-env', { modules: 'commonjs', debug: false } ], '@babel/preset-flow', '@babel/preset-react' ], plugins May 29, 2023 · Version Jest: 29. Dec 28, 2022 · Jest encountered an unexpected token Jest failed to parse a file. Dec 25, 2020 · Jest encountered an unexpected token with react-native. One more attempt. Check your jest. Sep 13, 2019 · In my case it was failing because I did not set properly the typescript support for Jest. Oct 24, 2024 · Jest 异常：Jest encountered an unexpected token; Jest 运行测试时发生 "Jest encountered an unexpected token" 的解决方法; Next. json: Oct 14, 2024 · FAIL __test__/sum. 3. However, your answer fixed this for me. I'ts like @dean-g pointed out. Jun 11, 2020 · I believe your case is pretty much similar to these ones: amcharts4 issue #2133 - github OR Jest encountered an unexpected token. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is n Jan 19, 2021 · Jest encountered an unexpected token - React with jest and enzyme Hot Network Questions The double-angle formula for cosine is expressible in terms of (single-angle) cosine alone; not so for sine. When I run 'yarn test' for my react app, I get the dreaded error: Jest encountered an unexpected token. Reload to refresh your session. Viewed 2k times export default App; Jun 24, 2024 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. js. Jun 28, 2019 · Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. Adapt this code to use @babel/plugin-transform-runtime in your config, I don't know if you are using ts, if not can remove the @babel/preset-typescript: presets: [ '@babel/preset-env', '@babel/preset-typescript', ['@babel/preset-react', { runtime: 'automatic' }] ], plugins: ['@babel/plugin C:\study\reactodo\node_modules\react-icons\fa\angle-down. This error occurs because Jest does not support JavaScript ES Modules, and a Node module needs to be transpiled from an ES Module to a CommonJS module. Sep 16, 2022 · New NX projects with React are still running into this issue, the jest. Dec 24, 2023 · You can do so by checking for the following configurations: You're Using the Right Transformer ; You're Using the Right Jest Testing Environment ; You're Using the Right " jsx " Mode in tsconfig. Sep 25, 2019 · I have a test for a test for a TSX file written in a JSX file which fails to run due to unexpected token: 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. However, despite following dozens of how-tos and tutorials, I am not able to fix the issue below. Dec 29, 2022 · Jest encountered an unexpected token Jest failed to parse a file. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration. , in a normal . This should fix the issue when using @agm/core for an Angular 6 app is being used with jest. json Renamed the relevant test files from . Sep 13, 2023 · Jest encountered an unexpected token. x I'll stick with this solution for now. My tests fail with this error: Test suite failed to run /my_project/node_modules/deck. js:2:44) at Object. Sep 6, 2020 · Fix "Jest encountered an unexpected token" with "create-react-app" # jest # testing # react # javascript Here is one of the most popular question which is related to testing with jest for repo setup with create-react-app as I've seen in stackoverflow community. e. ts file in all my apps to match your snippet, and it worked. config () Oct 20, 2021 · 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. Jun 30, 2023 · Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. jsx and added extensionsToTreatAsEsm: ['. Nov 30, 2022 · Yes, the Jest when break solving some dependencies is a nightmare when crashing. tsx to a relative import: import { MyModel, Type } from '. 0 Steps to reproduce Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Jan 27, 2025 · Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Jest failed to parse a file. Aug 2, 2022 · I had the latest version of nx, i. Sep 13, 2024 · I have created react app with parcel, (New to testing) While doing unit testing for my ContactUs page, I have came across this problem. Jan 30, 2022 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. json file on root directory. Sep 12, 2020 · Jest doesn't transform node_modules by default, transforming all third-party modules would result in significant overhead and unexpected results. If a component is single, and not importing anything else, "npm test" runs smoothly. yzusp oamej jbdoj vph mauso rhxqtee kcac subakaa bbfki gmmt vaqb tbda iolhq bwdjx xpmx