Jest syntaxerror unexpected token json. json to be "test": "jest --config jest.

Jest syntaxerror unexpected token json SyntaxError: Unexpected token Nov 16, 2019 · Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. Here' s what you can do: May 6, 2019 · After upgrade of jest-runtime to 24. ts-j Oct 5, 2017 · SyntaxError: Unexpected token import with babel-preset (Interestingly the same seems to be true for tsconfig. To verify this I used the jest --showConfig. js: 10. js extension and inside it using module. Mar 21, 2022 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. This file seems to not be recognize as a vue file when imported and doesn't use vue-jest. In order to use lodash-es, I had to set transformIgnorePatterns to inlude the path to lodash-es: "jest": { "preset": "je Oct 14, 2024 · And I tried with many solution with jest config, but it didn't work unless and until I have created jest. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax. So I added transformIgnorePatterns to my jest configuration and everything worked: Nov 21, 2018 · I'm trying to add testing to my Electron + Vue2 application written in TypeScript using ts-Jest/ Jest and Chai. ReferenceError: document is not defined Jest React Testing Library. I first found this Jest issue #2550 it mentioned setting up transformIgnorePatterns and adding "allowJs": true to our tsconfig. Sep 5, 2018 · So I'm trying to write tests on my React Native app with Jest and TypeScript. spec. I found that (for one permutation of pathToJest and pathToConfig anyway) the following command was being logged: May 21, 2023 · In modern web development, Data Transfer Objects (DTOs) play a critical role in ensuring that data is correctly validated, transformed, and… Feb 25, 2022 · I have a monorepo with Lerna and yarn workspaces. For example: 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. None of the popular solutions here were working for me either. 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) Dec 25, 2020 · With your current setup, jest will use the config from your package. Jul 2, 2019 · I have a Vue file which imports a Vue file from node_modules. test. However when I try and run the simple test I wrote to try and make sure Jest is working 使用vue-jest进行单元测试时可能会遇到”SyntaxError: Unexpected token ‘export'”的错误，这是由于ES6模块语法未被正确处理所导致的。 为了解决这个问题，我们可以通过配置vue-jest来正确处理ES6模块语法。 Dec 11, 2020 · I suspected the issue was jest was not reading my config from package. It’s known for its simplicity and speed, making it a great choice for testing both small and large projects. JSON file (object. I'ts like @dean-g pointed out. Jun 30, 2023 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Jul 19, 2017 · SyntaxError: Invalid or unexpected token when testing react application with babel and jest. 项目中引入第三方库报错，测试时Jest报错，export default portalCommunication; ^^^^^ SyntaxError: Unexpected token export > 1 报错原因是node_modules下的文件默认是不会被transform的(默认配置)，所以es6的写法报错了。 Jest is a JavaScript testing framework that is designed to be simple, fast, and reliable. 結論から書くと、tsconfig. json 中添加 --transformIgnorePatterns 这个 flag： Jul 2, 2018 · Test Vue with Jest fail, Jest encountered an unexpected token, SyntaxError: Unexpected token import 2 Vue/Typescript/Jest - Jest Unit Test SyntaxError: Unexpected token import May 13, 2019 · This site is currently in read-only mode. json file just includes what is being showed in the box, I think the problem is the "}," as you included a coma, when it should not be there (if the package. How to fix this issue? We can fix this issue by making sure that we are calling the right endpoint and we are getting a valid JSON response. html#basic-usage. 4. JSX syntax converted to, type checking). config file in your project. Jan 3, 2024 · FAIL src/App. x of jest so I think since I'm just now upgrading from 27. ts: Unexpected token, expected ";" (5:9) at my app variable. It produces the following output (pay attention to the src attribute): For those who use Vue test util in Nuxt 2 and are faced with question or this problem ({"Object. Dec 28, 2022 · Jest encountered an unexpected token Jest failed to parse a file. Sep 13, 2019 · SyntaxError: C:\tests\App. 22. You can use babel-jest or ts-jest as a transformer: You should use babel-jest as a transformer in the following cases: Jest encountered an unexpected token. component. 0 and supertest 3. Testing with Jest and Webpack aliases. Oct 29, 2019 · Unfortunately it looks like the various out of the box transformers are no longer maintained for modern Jest versions. Provide details and share your research! But avoid …. js: はじめにTypeScriptとNuxt. component Dec 28, 2018 · Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. so you can try the following. SyntaxError: Unexpected token o in JSON at position 1. Jul 22, 2019 · You signed in with another tab or window. toString() // "[object Object]" JSON. By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules". parse() is using any of the following in the string values: New-line characters. make a file with the name of fileTransformer. 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. json file just includes what is displayed in the box), because it is the last line of code, and there is no more JSON code following it. Jul 14, 2022 · 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. json. Component { ^^^^^ SyntaxError: Unexpected token export at transformAndBuildScript (node_modules\jest-runtime\build\transform. If you wanted greater control, you could add a Jest key to your package. json – Daniel Commented Sep 30, 2024 at 16:58 Describe a bug failing job run Expected behavior to produce code coverage (i understand this isnt supproted yet) Details Action version: OS, where your action is running (windows, linux): node version 12. See full list on dev. 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. Sep 12, 2018 · You signed in with another tab or window. Mar 17, 2020 · Two ways you can pass this test: Option 1. This option specifies how the output should be generated (i. js docs, but still same issue. I enabled debug output and opened dev tools. Dec 26, 2023 · Marcus Greenwood Hatch, established in 2011 by Marcus Greenwood, has evolved significantly over the years. ts Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. jsonのjsxが、 "react-jsx"ではなく、"preserve"となっていたからです。 Next. json, however for consistency and integration with code editors like vscode we force the tsconfig to have the exact same settings as the way that we compile. exports = "permanentComponentConfigurations. What you're most likely going to need to do is either mock it in your tests like so: FAIL __tests__/HomePage. /types/standard' from 'index. config. 3. Asking for help, clarification, or responding to other answers. Jul 22, 2017 · If your package. Apr 6, 2017 · new Object(). I am not very sure of how to transform @babylonjs in the node_modules. parse: unexpected character at line 1 column 1 of the JSON data Nov 23, 2021 · It seems that it has less to do with the version of the dependencies. Dec 21, 2018 · Relevant Debug Info. it's not plain JavaScript As answers above have described, Jest doesn't support ES6 modules. You signed out in another tab or window. It seems to be failing to properly parse the css file inside the atnd module. json jest config like this: JEST - SyntaxError: Unexpected token 'export' with uuid library. Jest provides babel-jest transpiler out of the box. json but not working, and for the github answer I don't think is related because I can run the app in Android Simulator but not working in Jest Testing. it 's not plain JavaScript. Dec 31, 2021 · 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 import a file which Jest Mar 29, 2023 · Jest encountered an unexpected token Jest failed to parse a file. json#overrides[0] ' : Unexpected token ' ? Mar 2, 2021 · I'm using Typescript and trying to test my code with Jest, and I made a type casting on a class so I can mock it. CRA & Jest. Indeed, it was different from package. 碰到了一些 Jest 的报错，列一下搜到的解决方案. json" This is the contents of my config: Jun 7, 2023 · React Jest - Unexpected token import. This usually means that you are trying to import a file which Jest cannot parse, e. Feb 14, 2019 · module. json but in jest. I tried to use an htmlLoader, but doesn't work either. Tabs (yes, tabs that you can produce with the Tab key!) > JSON. babelrc automatically. yml file ```yml name: CI Jan 18, 2023 · 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. Each yearly preset only compiles what was ratified in that year. To add support for other extensions you need to write custom transformers. By making it "^uuid$" this started working for me. 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. Jan 21, 2017 · While the solution by @mbaranovski works, I don't know if his intention was to use it as a transformer. Sep 18, 2024 · > @wtto00/android-tools@1. By default all modules in node_modules are not transformed, so the solution is to tell jest to transform it. How can I solve this? Jan 14, 2025 · Google Apps ScriptをはじめとするJavaScriptベースのプログラミングでは、「SyntaxError: Unexpected token」というエラーメッセージが表示されることがあります。このエラーは、コード内の文法ミスや予期しないトークン（記号や文字）が原因で発生します。以下では、エラーの背景、具体的な原因、影響 Jan 24, 2022 · Jest encountered an unexpected token Jest failed to parse a file. to Dec 24, 2023 · To fix this issue you need to make sure Jest is configured to transpile the code in a tsx (or jsx) file. In some cases, when I run jest --coverage --watch, I get the following error: Running coverage on untested filesFailed to collect coverage from May 10, 2023 · I have a test on a Vite &amp; TypeScript project which fails to run. However, while I was using jest for testing I got it working by saving the json with . json and I changed the test script in package. eslintrc. Jun 28, 2019 · Try changing tsconfig. I did what @tmhao2005 suggested and installed @babel/core, @babel/preset-env and babel-jest then added a babel. parse() It is suggested that the data is already parsed. Sep 28, 2018 · SyntaxError: Unexpected token u in JSON at position 0 at JSON. ) Setup your babel configuration to handle ES6 imports by add a testing env option (the testing environment flag will be defined in your package. json file under jest area since create-react-app still uses these options to override their default options: May 3, 2018 · Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Install jest-transform-css: yarn add jest May 31, 2018 · When running npm test or jest this is returned 'SyntaxError: in package. <anonymous> (src\components\category-tree\category-tree. Commands "emis-app:test": "yarn --cwd apps/my-app test&quot;, is located on Dec 17, 2018 · FAIL test/unit/app. json to be "test": "jest --config jest. parseJSON() and JSON. However, while running npm i, I noticed this warning: You signed in with another tab or window. js it works, unfortunately i havent found any docs about this why it does. I understand tha Jul 9, 2019 · Reactjs npm test: Jest encountered an unexpected token Hot Network Questions MLModern displays math-mode G with divot at certain document font sizes UPDATE who use create-react-app from feb 2018. 1. tsx Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Feb 28, 2018 · Unexpected token o in JSON at position 1. SyntaxError: "undefined" is not valid JSON Uncaught SyntaxError: Unexpected token u in JSON at position 0 at JSON. x I'll stick with this solution for now. Aug 8, 2022 · One other gotcha that can result in "SyntaxError: Unexpected token" exception when calling JSON. json file on root directory. 473. When JSON data is sent over the network, the Content-Type header should be set to application/json. The fetch() function then returns a promise, and when that promise resolves, we handle that with the response. json file. F:\\projects\\sip2\\sip-frontend\\apps\\respondent_app\\node_modules\\@babylonjs\\core\\index. Jest unexpected token 'export': How to fix Jest is a popular JavaScript testing framework. /abstractScene"; ^^^^^^ SyntaxError: Unexpected token export at FAIL src/index. 1. js' Issue : I am using ts-jest to test my typescript library. 这个是我的项目的问题，运行 Jest 后报错说 "SyntaxError: Unexpected token export"，最后是用在 StackOverflow 第二个解决方案成功的，修改方法为在 package. Feb 11, 2019 · Spun my wheels with this for 20 minutes before I realized that my scripts in package. You switched accounts on another tab or window. Sep 25, 2023 · 在进行前端开发时，Jest 是一个常用的测试框架，但是在使用 Jest 进行测试时可能会遇到 “SyntaxError: Unexpected Token” 错误，这是由于 Jest 默认无法识别某些语法或语言特性导致的。 Jul 5, 2022 · SyntaxError: Unexpected token 'export'が発生した場合 こちらの記事によると、ts-jestはESModuleに対応していないとのこと。 そして、導入したライブラリの中にESModuleで提供されているパッケージがあると、そのままではJest上でimportできないようです。 Oct 19, 2020 · You signed in with another tab or window. 0. The issue is with the base docker image. The test fails right out of the box with "SyntaxError: Unexpected token {". js): Sep 18, 2018 · This is happening because Babel 7 no longer loads your . I have used transformIgnorePatterns in jest config file which help us ignore node_modules which not supporting current nodejs version Jan 13, 2023 · Jest を実行した時、SyntaxError: Unexpected token 'export' が出ました😭 エラー詳細は以下の通りです。 FAIL ***. Moved the moduleNameMapper config to that file and then it worked. js and export an object. parse (<anonymous>) at <anonymous>:1:6 In other words, your app is attempting to parse undefined , which is not valid JSON. Mar 2, 2024 · If your server sends back the correct data, make sure it's Content-Type response header is set to application/json and not text/html. readFileSync("a. So, we need transform the code to a supported module type. js import registerRequireContextHook from "babel-plugin-require-context-hook C:\study\reactodo\node_modules\react-icons\fa\angle-down. After ejecting create-react-app your package. Then I destructured the object in my main file. js:2:44) at Object. Hence, if you execute the above code, it will throw the error: SyntaxError: Unexpected token < in JSON at position 0. Oct 30, 2023 · Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Please someone help. Unexpected token, expected ";" on import JSON in NodeJS jest testing. 0nux… Mar 4, 2024 · その1: Jest encountered an unexpected token; 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. Ask questions, find answers and collaborate at work with Stack Overflow for Teams. . Here's what you can do: The Jest unexpected token error occurs when Jest encounters a token that it does not expect. We could use babel-jest or ts-jest. parse ({}) Nov 27, 2020 · I'm running yarn test on a project and I get the following error: ({"Object. json in ts-jest, but here you can specify the path to Jun 18, 2020 · ReactプロジェクトにJestを導入してテストコードを書いていたところ、エラーに遭遇して躓いたためその備忘録として。事象以下のようなSampleコンポーネントをJestでテストした時、エラーが… Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. 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、 Jest encountered an unexpected token: What it is and how to fix it. exports = { moduleFileExtensions: ['js', 'jsx', 'json'], // add 'json' }; SyntaxError: Invalid or unexpected token @import. exports. e. json` file in its directory Jan 6, 2020 · Describe the bug SyntaxError: Unexpected token To Reproduce . it's not pla Mar 17, 2024 · 解決法. I use Azure Devops to build and publish the application. parse. test process. So I need something to do that work. That base docker image has old alpine with nodejs version 12. Nov 9, 2023 · Jest 一些报错信息. 6. By default jest doesn't transform ES6 js code from node_modules. 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 Aug 22, 2017 · ({"Object. <anonymous> (src\components\category\category. I think this one is more documented. export function flatten (target, opts) { ^^^^^ SyntaxError: Unexpected token 'export' I made sure my jest was properly installed and set up, as per Next. Hope it is useful! Aug 2, 2022 · How to solve this weird jest module resolution? Files. jest\\register-context. This issue still persists. Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. parse() converts the input into a string. <anonymous>":function(module,exports,require,__dirname,__filename,jest){ SyntaxError: Invalid or unexpected token. In my case, the package react-navigation module need to be translated. org/docs/handbook/jsx. Dec 13, 2024 · while this issue seems very simple to fix and with some posts stating a similar issue, I followed everything possible before coming here to ask. Try Teams for free Explore Teams Feb 28, 2022 · in latest jest you do not need ts-jest and ts-node-dev, you also do not have to include jest. However, despite following dozens of how-tos and tutorials, I am not able to fix the issue below. x action. parse() . touch jest. g. json probably contains:. json"; 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. To have it point to your jest. I'm writing some tests for my backend and things have been going ok, however for a specific case of a specific route, the test is failing even though the May 31, 2019 · Jest with Angular 7 SyntaxError: Unexpected token suite failed to run Jest encountered an unexpected token This usually means that you are trying to import a file Oct 5, 2024 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. – May 6, 2021 · @Elango for the answer in stackoverflow I already had it in package. js:5 export default class FaAngleDown extends React. Jun 6, 2021 · Jest encountered an unexpected token Jest failed to parse a file. json")) SyntaxError: Unexpected token in JSON at position 0 And based on a suggestion here [ 2 ], you can replace it or drop it before you call JSON. <anonymous>":function(module,exports,require,__dirname,__filename,global,jest){export Jun 29, 2022 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. js file you can update the test script to jest --config <insert_path_to_jest. There is a new concept of root config which should be located in the root of your project and the file must be named babel. Aug 21, 2017 · Core problem is that ts-jest (jest-preset-angular is based on ts-jest) does not transpile JS files. To troubleshoot the Jest unexpected token error, you can use the following steps: Check your code for syntax errors. It is used by a wide range of developers, from beginners to experts. parse (<anonymous>) Jest encountered an unexpected token - React with jest and enzyme. Sep 6, 2021 · Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. Jul 9, 2022 · // Don't // This will result in "Uncaught SyntaxError: Unexpected token o in JSON at position 1" JSON. js has been altered during migration, but the the projects in the workspace have not had their jest. Aug 2, 2022 · I was using a jest. Finally!! Just in case, changing it to "react" fixed my main issue. Nov 4, 2021 · The issue started when updating Jest from 26. Cannot find module '. There are two common causes for this. We use @babel/preset-typescript to compile the code and don't actually need a tsconfig. May 22, 2018 · No, this is a change they explicitly made. This did not work, what did solve it in the end was adding the following to our jest. thanks! – duck_wad Mar 16, 2023 · @axiac Thank you for pointing this out. Apr 10, 2019 · Cause: babel-jest uses babel configuration that is loaded based on the location of the file that is going to be transformed. it's not plain JavaScript. Dec 7, 2020 · hm yea that did fix the problem, but now I'm getting the "jest encountered an unexpected token" for the import of that file. js>. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration. 8. Unfortunately, when I ran the test suite I got the following error: SyntaxError: C:\\ Nov 30, 2018 · First of all, thanks for bringing Jest to Angular! I previously had configured Jest in my Angular project by myself. env with Jest. jsで作成したWebアプリケーションをJestでテストしようとしたらハマったので、その備忘録として残します。環境Node. json#overrides[0]':Unexpected token '?' When I'm looking for more details about the error, I have the following logs : SyntaxError: Failed to load plugin ' jest ' declared in ' . Mar 7, 2017 · Jest encountered an unexpected token SyntaxError: Unexpected token . Sep 6, 2019 · I'm guessing here but I think next's parser is just wrapping the typescript compiler when it finds that you have a tsconfig. We’ll return with full functionality soon. While using old babel version everything worked fine, but because of some project problems we had to upgrade babel to 7 Jan 27, 2017 · I am running a jest test which depends on the "antd" node module. parse (< anonymous >) at index. Test if object, array or string. node. I then created a new config file, jest. js project (using TypeScript), and I believe that I have encountered some configuration issues related to using firebase that are causing my Aug 16, 2018 · 🐛 Bug Report This bug is likely the same as #6258. json scripts, for example: "test": "NODE_ENV=testing jest" or "test": "BABEL_ENV=testing jest") The workaround I've found is to 'whitelist' node_modules in package. Aug 9, 2021 · Looks like graphql-moment code isn't being published with a commonJS, UMD, or some other compatible format and Jest can't parse it. json: an unexpected token Jest failed to parse a file. Aug 24, 2018 · I'm integrating jest into my nuxt application using vue-test-utils (following Edd Yerburgh's new book). json() method. I recommend using ts-jest for simplicity. tsconfig. js:284:10) at Object. Sep 6, 2020 · The easiest way to fix this one is of course also using the same option transformIgnorePatterns but we just simply put in the package. You cannot override the moduleNameMapper in package. ts file and the quotes kept getting stripped off "uuid" and the fix didn’t work. js ala "test": "jest --config=. js --silent",. babel-preset-env replaces es2015, es2016, es2017, latest. 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。 Jan 22, 2010 · Saved searches Use saved searches to filter your results more quickly Oct 15, 2017 · Uncaught SyntaxError: Unexpected token u in JSON at position 0 at JSON. 5 test E:\projects\github\wtto00\android-tools > jest --detectOpenHandles --verbose FAIL spec/start. I adapted one of them and simplified the code some. Jest matching objects in array. parse(new Object()) // Uncaught SyntaxError: Unexpected token o in JSON at position 1 JSON. The global jest. Feb 9, 2024 · I ended up finding the solution I had to add the library to the transformIgnorePatterns. Visit our status page or search our recent meta posts on the topic for more info. Earlier this config was in package. "SyntaxError: Unexpected token < in JSON at Aug 17, 2020 · I ran into the same issue when switching from lodash to lodash-es. Before, failing with "Unexpected token import": SyntaxError: Unexpected token Aug 18, 2024 · Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. A file is a module if it has a `package. Jan 8, 2021 · How to fix "SyntaxError: Unexpected token o in JSON at position 1" in NodeJS/Express server. ts to tsconfig. <anonymous>":function(module,exports,require,__dirname,__filename,global,jest){import glyphMap ^^^^^ SyntaxError: Unexpected token import Googling a solution I ended up most of the time with something similar to what is mentioned here . It seems the test runner is not able to understand Typescript code. js cannot parse json - reason: Unexpected token in JSON at Jan 29, 2023 · ESLint: syntaxError:Failed to lad plugin 'jest' declared in '. js in the test/unit directory, and then add these codes: Jun 27, 2018 · I'm using jest 23. I finally found a workaround for this. Jest is a popular JavaScript testing framework. Mar 2, 2022 · 4. js altered with the new transformIgnorePatterns and transform configurations. Jul 16, 2020 · Can’t seem to run my tests without failing. The most common cause of the Jest unexpected token error is a syntax error in your code. js:1 export * from ". json open jest. 0 the json file import stopped working because the json file is not imported but transformed into following string module. ts Test suite failed to run Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot 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. What is causing “Uncaught SyntaxError: Unexpected token o” with $. /jest. May 28, 2024 · Jest encountered an unexpected token - SyntaxError: Unexpected token 'export' 11 Jest and Babel transpilation - SyntaxError: Cannot use import statement outside a module Jan 15, 2019 · Jest will automatically transform your files to ES6 if you have a babel. I have been working on this issue trying to solve it with several configurations, however, I haven't been able to solve it. They decided project config shouldn't affect node_modules, which is entirely reasonable since project config can contain stage-0, react/jsx, flow and other things that should not be used in packages. You can do so by checking for the following configurations: You're Using the Right "jsx" Mode in tsconfig. Reload to refresh your session. jsではtsconfig. Based on this, on latest configurations you must use/replace your Plugins/Preset of es2015 and any esX to the new one: env. parse("[object Object]") // Uncaught SyntaxError: Unexpected token o in JSON at position 1 JSON. parse(fs. ts. js:3 Uncaught SyntaxError: JSON. 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. I figured it out. 3 to 27. It seems like a typescript module that can’t be transformed by jest. Jun 15, 2024 · Jest encountered an unexpected token Jest failed to parse a file. json pointed to an external jest. 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 Jan 27, 2025 · Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Details typescriptlang. After some further research: Unexpected token o in JSON at position 1. This happens e. json file "jest": { "transform": {} } Also, take a look at the Babel-Jest project which will compile ES6 modules during testing. Oct 17, 2017 · Jest doesn't use Webpack so it doesn't know how to load other file extensions than js/jsx. js in the root of my Nx Worspace and updated the base jest. 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 Jan 27, 2023 · I am trying to set up firebase authentication on my Next. illlry hpm ghjs uwb onpr qucfjtna ptnhg wdosgzr wmb nneip sviq iugnrkq yanot xkwad wdpbyz