Jest encountered an unexpected token nextjs json. js, I set the "transorm" option with babe.

Jest encountered an unexpected token nextjs json. Here is my final jest configuraiton (package.

Jest encountered an unexpected token nextjs json Current Behavior Tests are failing on frontend services but passing at backend services (Same jest. The test fails right out of the box with "SyntaxError: Unexpected token {". yarn run v1. Next. I am trying to set up firebase authentication on my Next. {color: red} ) before a className in CSS files 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; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I'm encountering a weird issue with either Babel or Next. json. now jest 28+ will load in the browser esm code, but jest esm support is not fully supported. . it's not plain JavaScript. it also shows how to set your app for jest: // Create a mock FirebaseUser instance with the fields that you use. json pointed to an external jest. You could use next-firebase-auth. 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; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company This is one of these post: explaining how to glue pieces together and humbly describes one task done. I have 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. It looks like Jest wasn't expecting the export token from the uuid package (a dependency of DynamoDB). jsonの該当項目はビルド時に自動的に"preserve"に書き換わる挙動をするようだったので、 Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. New-line characters. js) Expected Behavior Tests will run successfully Failure Logs export const infoLoggerFunction = generateMockedLoggerFunction(); ^ Have you ever wanted to display charts in any of your Android apps? If so, keep reading to learn how to do so! I fixed it by just following the getting started instructions for Jest as well as ts-jest. <anonymous>":function(module,exports,require,__dirname,__filename,jest){export The jest encountered an unexpected token error message can appear while working with specific frameworks and libraries in JavaScript that require additional configuration to be resolved in Jest, such as TypeScript, Next. Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. npm run test > [email protected] test > npm run unit > [email protected] unit > NODE_OPTIONS=--experimental-vm-modules jest --config jest. I'm not sure why I can't set it to react-native yet, but everything seems to work for now. ) (For a full list see the String section here. I refuse to write my packages with old-skool require() and module. 4 $ jest App. I believe your case is pretty much similar to these ones: amcharts4 issue #2133 - github OR Jest encountered an unexpected token. REACT Jest - 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. According to issue 488 from the UUID repository, this seems to be related to a "reverse dependency of this package". I'm using Next. Jest with Babel ^7. trim()); } – @James yeah, when I comment-out the styles import everything runs fine. Now I want to test multiple components together, and I immedia Spun my wheels with this for 20 minutes before I realized that my scripts in package. jest --no-cache Share. This means that a file is not transformed through TypeScript compiler, e. Hot Network Questions How do we interpret Herod’s authority in Mark 6:27? Calculus problem: distance between two functions' graphs jsx Mode Description Use When "jsx": "preserve" This will preserve the tsx (or jsx) code so that it can be transpiled later by another transformer (such as Babel). js, I set the "transorm" option with babe Things change quickly in the js world. However, your answer fixed this for me. js, The fact that Jest is calling “export” an unexpected token means that Jest is viewing this file as a commonjs package and it should be viewing it as an ESM package. 4. By default, if Jest sees a Babel config, it will use that to transform your files, ignoring I'm trying to write a test case in a NextJS application using Jest. You cannot override the moduleNameMapper in package. parse. その1では jest が ESM に対処するための設定をしたが、今回は jest が jsx に対処するための設定をすることになった。 エラーメッセージ. // createJestConfig is exported this way to ensure that next/jest can load the Next. Jest encountered an unexpected token - React with jest and enzyme. I added a "transformIgnorePatterns" to the test script in my package. json: "dependencies": { "react": "16. and the React team recommends using a production-grade framework like Next. I had an issue in which my unit tests were running just fine on my machine but failing on jenkins, your solution caused jest to give me a warning saying that globals are deprecated and then the tests took forever, I removed the globals and ended up with: export default { displayName: 'my-lib', FAIL __tests__/HomePage. js. e 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. 🐛 Bug Report In my jest tests, when i attempt to run jest, this is output: FAIL test/product. js that you might be affected by this issue. js: Jest encountered an unexpected token. Tabs (yes, tabs that you can produce with the Tab key!) Any stand-alone slash \ (but for some reason not /, at least not on Chrome. js + typescript + jest + ts-jest working with 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. controller. json file "scripts": { "test": "jest --coverage --color" }, My sample test file. This just takes our JSON response and converts it to a JSON object to be used! Jest encountered an unexpected token . If not, keep looking for solutions, you'll come across one that works! Conclusion: Thanks for reading this blog post! Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. e. 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. css stylesheet. import nextJest from 'next/jest. js to use the new tsconfig. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. js:. Jest's documentation for config is light on full, useable examples. Asking for help, clarification, or responding to other answers. js で書いて FAIL __tests__/App-test. I had a very similar issue and at the end I solved it just using --no-cache when running jest. js has been altered during migration, but the the projects in the workspace have not had Jest encountered an unexpected token Jest failed to parse a file. js are both in my package. conf. I understand tha Version Jest: 29. 1 test > jest FAIL __test__/index. I wrote step by step what I did, maybe it could help you investigate later some other bugs: I removed babel-core, @babel/core and babel-jest to be sure jest will use the defaults sipped with it. Similar code bu Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. jsではtsconfig. js file you can update the test script to jest --config <insert_path_to_jest. js it works, unfortunately i havent found any docs about this why it does. SyntaxError: Invalid or unexpected token when testing react application with babel and jest 34 Jest encountered an unexpected token - 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. This 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. I solved it by moving the jest configurations from the package. Website. it 's not plain JavaScript. parse(data. I'm attempting to create a test using a component returned by the withTheme function from the RJSF (React JSONSchema Form) libr Marcus Greenwood Hatch, established in 2011 by Marcus Greenwood, has evolved significantly over the years. Here is the setUp file that it's referring to: setUptests. Here are the steps: congrats you got next. 6. However, while running npm i, Just found this from official website “ Note: babel-jest is automatically installed when installing Jest and will automatically transform files if a babel configuration exists in your project. S. js --silent",. ts! 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. These errors can occur due to Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. One could even do it only when it is required: try: json_data = JSON. I also had in my package. 3 Steps to reproduce NB this is not a "minimal" reproduction, but will reproduce the problem. If a component is single, and not importing anything else, &quot;npm test&quot; runs smoothly. The only thing I can do it just add this under moduleNameMapper inside package. js 15, from basic setup to handling common issues and exploring FAIL __tests__/HomePage. 9. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax. 結論から書くと、tsconfig. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your I'm working on a project that utilizes Next. json and added {"presets": ["@babel/preset-env"]} Jest encountered an unexpected token. and created a new file babel. Jest is not recognized by typescript. I recently joined a very excited project and my duty was setup a test suite for our Next. If you dig Jest encountered an unexpected token: Learn how to fix this common JavaScript error with step-by-step instructions and code examples. next/jest. Failed to load plugin 'jest' declared in 'package. config. I managed to solve it by installing the below presets and having the babel configuration file as follows: As the title says I have been working with next and jest for couple of weeks now but the last days I am facing an issue with jest. 3 project with typescript. ts file in all my apps to match your snippet, and it worked. js or Remix instead. Jest provides babel-jest transpiler out of the box. json file into a jest. ts FAIL tests/unit/get. spec. 解決法. it's not pla Jest encountered an unexpected token Jest failed to parse a file. If it's not clear and a reduced reprod Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. because it is a JS file with TS syntax, or it is published to npm as uncompiled source files. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is n Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. tsx 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. When I run 'yarn test' for my react app, I get the dreaded error: Jest encountered an unexpected token. Given that your transformIgnorePatterns worked before introducing the lib, the trick is simply to add "react-native-iphone-x-helper" to the "transformIgnorePatterns" attribute. Because I had to carry jest configs from package. when your code or its dependencies use non-standard JavaScript syntax, or when Jest Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. Version 27. This thread has been automatically locked since there has not been any recent activity after it was closed. I can run the Jest test written in plain ol' JavaScript just fine, but the Footer. it ' s not plain JavaScript. Some users have reported this issue solving itself after updating their version of NodeJS. ts Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. This isn't one of those issues where a Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. 0 Steps to reproduce Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Jest: SyntaxError: Unexpected token 'export' 2. I can't get my tests to run. transform jest encountered unexpected token. npx nx migrate latest didn't create any migration file (so it said). Many of the threads are long. when your code or its dependencies use non-standard It's worth noting if you're using Next. By the time I figured this out I had manipulated the jest. js when trying to run TypeScript jest tests. Edit: According to this github issue compatibility issue has been solved with the latest release of the uuid library. json includes a jest config section and you can configure how Jest runs in that section. I have checked documentation of JEST or some code here but things which I do does n This was a problem due to the tests folder being nested in the directory above the root directory of the project. js project (using TypeScript), and I believe that I have encountered some configuration issues related to using firebase that are causing my Jest tests to fail. The output will have a . This guide will help you get your Jest tests back on Running into the following error when trying to run unit tests for a Next. This happens e. parse(data); catch(ex) { json_data = JSON. The global jest. Unexpected token import usually means babel is not converting to commonJs Jest encountered an unexpected token Jest failed to parse a file. 22. So my jest. js Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. So I need to configure jest so he will transpile both js and ts files. Hot Network Questions Saved searches Use saved searches to filter your results more quickly I have a problem with running a simple project in WebStorm IDE. This tutorial dives deep into the Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. js enables developers to create, read, and manipulate Excel files with ease. js look like this: Next. 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. js makes it hard to transpile modules in node_modules, but you can modify the baked config in jest. jest. Check your jest. json – Tim Kilian. Incorrect Jest Configuration: Ensure that your Jest configuration is set up correctly to work with Typescript files. As per the accepted answer @sdgluck, I had to add a babel. /jest. プロダクションコードの TypeScript はトランスバイルできていたので Jest and Webpack - Unexpected token import. Turns out babel 7 WILL be chosen and installed because of react It looks like the cause is Typescript-related but I have some typescript handling in the package. The fetch() function then returns a promise, and when that promise resolves, we handle that with the response. 4. This is what I get when I hit run: Test suite failed to run Jest encountered an unexpected token This usually means that yo Fix "Jest encountered an unexpected token" with "create-react-app" to fix this one is of course also using the same option transformIgnorePatterns but we just simply put in the package. 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; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company The fact that Jest is calling “export” an unexpected token means that Jest is viewing this file as a commonjs package and it should be viewing it as an ESM package. js file. I test Vue project with jest, bug I got errors says: Jest encountered an unexpected token and SyntaxError: Unexpected token import here is my jest. 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. SyntaxError: Unexpected token '<' テストコード内の < という記号がパースできなくて投げ出している。 tsconfig. js extension. tsx file fails with an unexpected token import m @Abhishek is right on, worked for me, thank you! :) I had to create a jest. 51 issue. Reload to refresh your session. – juliomalves. export function flatten (target, opts) { ^^^^^ SyntaxError: Unexpected token 'export' I made sure my jest was properly installed and set up, as per Next. json() method. Please open a new issue if you think you have a related problem or query. json » eslint-config-react-app/jest': Cannot read properties of undefined (reading 'meta') Ask Question Asked 2 years, 11 months ago Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. 5. The package. FAIL app/tests/master. My . jsx extension. How do I get it to transform my imported file so I can have try/catch. ; I ran yarn why @babel/core to see if it was still installed, and if so why. babelrc and my jest. @PrashantTapase trim is not necesarilly needed but if you expect that the input for JSON. use Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. js file with jest, but it was failing because the component imported a . Jest encountered an unexpected token inside ts-jest/node_modules/jest-util Hi all, I&#39;m trying run jest using ts-jest, but I&#39;m running into the following error: Jest encountered an unexpected token This usually means that you are trying to In the above example, the fetch() function is being used to retrieve data from a API that returns JSON format - in this case https://localhost:3000/data. Save my name, email, and website in this browser for the next time I comment. ' My package. exports = { moduleNameMapper: { Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Unexpected token export jest angular. json to a seperate . I tried this as well, and it did not solve my 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. Hot Network Questions 目(め)-suffix usage module. Try using Jest 23. 0-beta. json file with the below code 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. On running the test, below error occurs: ({"Object. * In this case we will tell jest to load in the common js code regardless of environment. js>. json, so I'm not sure why it wouldn't be handled. jsx Test suite failed to run Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cann I am getting Unexpected token on the React Component Name while running npm test. Moved the moduleNameMapper config to that file and then it worked. Marcus, a seasoned developer, brought a rich background in developing both B2B and consumer software for a diverse range of organizations, including I am trying to test with Jest, but got an error: 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 when Jest is I have problem like: Jest encountered an unexpected token I did not find a correct solution for my boilerplate. Hi redwood community! I am trying to use react-markdown in a new redwood 4. config file and It didn't make a difference either. Unexpected token ] in JSON at position 608 at JSON. exports = {preset: 'ts-jest', testEnvironment: 'node',}; Long story short, I ran: - yarn add --dev jest typescript - yarn add --dev ts-jest @types/jest testing React Native Application with Jest - Jest encountered an unexpected token 12 SyntaxError: Unexpected identifier jest & babel 7 & react-native 0. Ask Question Asked 5 years, 9 months ago. Jest: Failed to parse the TypeScript config file. Commented Mar 11, 2019 at 8:10. js, TypeScript, and Jest. * before jest didn't fully support package exports and would load in common js code (typically via main field). Jest failed to parse a file. – Brian Adams. 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。. You signed in with another tab or window. FAIL src/EnummerEditor. Unable to run jest tests in React typescript. jsonのjsxが、 "react-jsx"ではなく、"preserve"となっていたからです。 Next. 0. Jest 24 changed the processor for file/glob matching to micromatch 3. Hot Network Questions I'm integrating jest into my nuxt application using vue-test-utils (following Edd Yerburgh's new book). parse may be corrupted by chars that may be filtered out by trim then you can apply it. js ala "test": "jest --config=. 88. In my case it was failing because I did not set properly the typescript support for Jest. To have it point to your jest. js, Node. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration. js is straightforward: module. it's Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. vue$": "@vue/vue3-jest" } Warning: be sure to use the right vue-jest package with the npm install command and inside your jest. With your current setup, jest will use the config from your package. json "react-markdown-preview Issue : I am using ts-jest to test my typescript library. EDIT Jest encountered an unexpected token when testing react-native with jest. I'ts like @dean-g pointed out. js application using the jest command: This error could be caused by a number of issues and is This comprehensive guide will walk you through everything you need to know about using Jest with Next. My test suits run with no errors until I install this package: fir I am now using React Jest to test code. npm install @babel/core babel-loader @babel/preset-env @babel/preset-react @babel/plugin-proposal-class-properties @babel/plugin-proposal-object-rest-spread 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. package. 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, when I run a test for a component that uses the remark module, I get the following error: Jest encountered an unexpected token Jest failed to parse a file. 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; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Also the jsx compiler option in tsconfig. Core problem is that ts-jest (jest-preset-angular is based on ts-jest) does not transpile JS files. js file to ensure that the transform configuration for Typescript files is properly set up. It will install all FAIL __tests__/index. SyntaxError: Unexpected token m in JSON at position 0: Jest fails running tests all of a sudden. js module. 5. Then I found this question: Jest transformIgnorePatterns not working , which mentions you need to configure Babel. Jest encountered an unexpected token when testing react-native with jest. However, despite following dozens of how-tos and tutorials, I am This could be a temporary workaround until babel configs are fixed. Jest encountered an unexpected token with Next. 1. 8. Name *. json which contains comments is imported: $ jest --ci --coverage --reporters=default --reporters=jest-junit Error: Jest: Fa Hopefully, this solves your issue. ts FAIL tests/bsv/fee. Reactjs npm test: Jest encountered an unexpected token. Just use presets env, react, stage-0 to babelrc. 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？ Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. js, and I setup Jest using the official instructions. selenium. My jest. Jest encountered an unexpected token. 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 include transformIgnorePatterns: Jest encountered an unexpected token Jest failed to parse a file. I had the latest version of nx, i. So I need something to do that work. tsx Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. You signed out in another tab or window. json but in jest. mjs like this:. tsx FAIL __tests__/App. "scripts": {//. npm i --save-dev jest @testing-library/react @testing-library/jest-dom jest-environment-jsdom then added jest. 3. Introduction: Jest, a powerful testing framework for JavaScript and TypeScript projects, occasionally encounters unexpected token errors while parsing files. 0. ( The way I got around this was to create a seperate tsconfig. 34. SyntaxError: Unexpected token '. Thank you 🙂. I reinstalled this packages. I updated my jest. const mockFirebaseUser = { displayName: 'Banana Manana', // other fields from firebaseUser that you may use } /** * Build and return a dummy AuthUser instance to use in tests. Commented Nov 15, 2019 at 17:52. js config which is async export default createJestConfig(config) I dont understand why this is a solution since i am not importing those packages in my package Jest encountered an unexpected token - SyntaxError: Unexpected token 'export' Load 7 more related questions Show fewer related questions 0 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. exports = { env: { test: { presets: [ [ '@babel/preset-env', { modules: 'commonjs', debug: false } ], '@babel/preset-flow', '@babel/preset-react' ], plugins Jest encountered an unexpected token Jest failed to parse a file. When I try running tests for any component that uses react-markdown I get some issues here Jest encountered an unexpected token Jest failed to parse a file. 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; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog Jest encountered an unexpected token - SyntaxError: Unexpected token 'export' Hot Network Questions Converting EU motors 230V 30A for U. Jest encountered an unexpected token Jest failed to parse a file. have been searching for two days, tried many answers, but couldn't find a solution. g. 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. js app 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. js and TypeScript when using createUserWithEmailAndPassword in firebase/auth. present. ; I upgraded ts-jest (it was 22). when your code or its Jest failed to parse a file. json instead of a jest. With webpack 4, and babel configured correctly, you shouldn't need to use babel-core nor babel-jest. Getting the following error: I've tried quite a few different plugins, transforms, etc. json 파일의 test 명령어에 다음과 같은 옵션을 적용한다. I hope the issue may be clear from the description. React based application moving unit tests from mocha to jest. js docs, but still same issue. : Use this when you're using babel-jest to transpile your tsx (or jsx) files. Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. json but then I cannot use the react-pdf module to test things like checking that the pdf file loaded correctly One other gotcha that can result in "SyntaxError: Unexpected token" exception when calling JSON. Email *. parse() is using any of the following in the string values:. 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). configs "test": "react-scripts Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. Out of the box Jest supp Jest encountered an unexpected token Jest failed to parse a file. test. js I also tried configuring jest directly from package. Jest encountered an unexpected token nestjs. This broke a lot of my regex in the Jest. Trying to get babel-jest working (see earlier comment^ ), but even this is a tad confusing. Additionally, in the details section of the test output, I see: configure jest. /', }) // add any custom config to be passed to Jest /** @type Jest encountered an unexpected token Jest failed to parse a file. import { configure } from 'enzyme'; // eslint-disable-line import/no-extraneous-dependencies import Jest encountered an unexpected token Jest failed to parse a file. 56 SyntaxError: Unexpected token u in JSON at position 0 at JSON. and can't seem to find the right nail for this I installed jest with the following command on my next js project. Then, you'll just have to update your jest configuration (in jest. 4 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. js transform: presets array property to contain imports that it Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Jest test fails with "window is not defined" 6. parse (<anonymous>) Jest encountered an unexpected token - React with jest and enzyme. json dependencies like babel-jest, babel-preset-es2015, babel-preset-react, etc. SyntaxError: Unexpected token import. Here are I created an NPM package that uses modern JavaScript. Again Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. ts for example) and add a transform section "transform": { "^. Tried reading several other similar questions but none seems to be working for me. "Jest encountered an unexpected token". any clue? below are my config files. You switched accounts on another tab or window. It seems that it has less to do with the version of the dependencies. Here is my final jest configuraiton (package. json file under jest area since create-react-app still uses these options to override their default options: jest": 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; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. } catch {^ I'm assuming that I need babel to transform the files that i'm importing but I don't understand how jest/babel are wired up together. Cannot run Jest in WebStorm. json): Jest encountered an unexpected token. json and my test file content below You signed in with another tab or window. Details: Jest encountered an unexpected token Jest failed to parse a file. Jest encountered an unexpected token - SyntaxError: Unexpected token 'export' Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. The threads span a number of years - meaning that the issue keeps cropping up for people repeatedly. please any help? jest. +\\. Crashing due to dot ( . I have added content of babelrc , package. ) The ExcelJS library in Node. Babel7 Jest Jest failed to parse a file. – Sadra Abedinzadeh 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; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I found my problem. json needs to be set to "jsx": "react". None of the popular solutions here were working for me either. npm run test > typescript@0. PS C:\Users\myland\code\services\packages\open-api> npx jest PASS tests/bsv/health. If using modules: false on root level, you'll need to use modules: true on the test environment. Provide details and share your research! But avoid . Testing react components: Jest encountered an unexpected token. js file Common Causes of Unexpected Token Errors in Typescript Jest. By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules". 🐛 Bug Report jest fails with the following error, if TypeScript is used for the configuration file and a tsconfig. Jest encountered an unexpected token when working with React TypeScript. parse Several of my unit tests are failing to run with the following error: Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, I ran into a similar situation where I wanted to test a React component . I was using Babel with Webpack. js for create-react-app without ejecting it, thought might help someone, here is a script to dump it to screen, then follow instructions above: Jest is a popular JavaScript testing library used to write and run tests for your code configuration in your jest. "jsx": "react-native" Same as the "preserve" option, but the output will have a . Unexpected token, expected ";" on import JSON in NodeJS jest testing. 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; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. js' const createJestConfig = nextJest({ dir: '.