Jest encountered an unexpected token export react json file java js extension. With these settings, I can now run npm test and it properly runs my tests - including those that require an import of @toolz/is-a-regular-object. service' I'm using a custom Jest configuration along with ts-jest. I'm using Jest to test my React app. SyntaxError: Unexpected token 'export' Jest encountered an unexpected token. Hi, can you please put your tsconfig. There is just a function inside your code, it never gets called and it does not even decode JSON anywhere. You cannot override the moduleNameMapper in package. There is only one test file generated automatically: import React from 'react'; import ReactDOM from 'react-dom'; import App from '. json: FAIL src/utils/html-to-markdown. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax. Step 1: installation: In my case it was failing because I did not set properly the typescript support for Jest. SyntaxError: Unexpected token '. 3. You’ll gain a better understanding of how HTTP The jest encountered an unexpected token can be caused by the inability to configure Jest with creat-react-app, Jest not being able to transform packages, inability to transpile modern JavaScript, circular imports when mocking modules, Jest not able to transform the dependency, and incompatible dependencies after the update. Jest encountered an unexpected token Jest failed to parse a file. zip file, here's the tsconfig. json file under jest area since Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. 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 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 Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. FC Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Modified 1 year, this is my file: package. g. In case you have multiple imports in the file and you want to export all in one object, use export {UserList, otherComponent}? With this, you don't have to use the default. 34. I'm trying to run a test for a personal website done in create-react-app. Jest: SyntaxError: Unexpected token export This is happening because Babel 7 no longer loads your . js environment, so it uses modules following the CommonJS. To save people from having to unpack the . 1. <rest of the exception> I don't understand why this exception is occurring. When JSON data is sent over the network, the Content-Type header should be set to I had this same issue! I'm not sure if it's the same case as in the original question, but for me jest was still somehow trying to load the images as JS and trying to parse them while I had the files matching image extensions mapped to a mock in moduleNameMapper. . EDIT: This failed on jest 29. Recently, I added DeckGL to my app. amcharts4 issue #2133 - github OR Jest encountered an unexpected token. and can't seem to find the right nail for this Jest encountered an unexpected token Jest failed to parse a file. selenium. . Jest says SyntaxError: Unexpected token export - React, Material. Jest failed to parse a file. js: Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. Commented May 12, 2019 at 22:26. jsx extension. 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. Jest encountered an unexpected token - import (Angular CLI 6) 9. , in a normal . 5. JSONParser(Unknown Source) . react js unexpected token export on export{default as Cards} 0. Asking for help, clarification, or responding to other answers. – Sulthan. My file also included some code to map the @ character to the root src directory, since I had webpack and this was Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. The only way I could get this to work for myself was to add: { "targets": { "node": "current" } } So that my presets read: Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. 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. You signed out in another tab or window. You signed in with another tab or window. 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. In your package. json file make the following changes: Unexpected token export jest angular. tsx to a relative import: import { MyModel, Type } from '. Jest encountered an unexpected token ReactJS. js using TypeScript. So to give you some steps to follow: rename your . To do this, try configuring @babel/preset-react with runtime: "automatic" (and installing @babel/preset-react if needed). ts Test suite failed to run 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. Jest encountered an unexpected token. Tried reading several other similar questions but none seems to be working for me. My tests fail with this error: Test suite failed to run /my_project/node_modules/deck. it's not pla Here is the setUp file that it's referring to: setUptests. This did not work, what did solve it in the end was adding the following to our jest. service';, and it seems that Jest is having trouble parsing it. test. I changed in scripts: "test": "jest --config jest. In this comprehensive guide, we'll help you understand the cause of this error and provide a step-by In this post, I'm not going to explain how to configure react-testing-library and Jest, there is a lot of useful information about it. – Tarun. e Jest encountered an unexpected token. /common/model/MyModel'; React based application moving unit tests from mocha to jest. js. io. export * from '. Then you need to create one configuration file with name . Getting the following error: I've tried quite a few different plugins, transforms, etc. json and my test file content below Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Please help me out. When I run 'yarn test' for my react app, I get the dreaded error: Jest encountered an unexpected token. By default, if Jest sees a Babel config, Jest failed to parse a file. Ask Question Asked 1 year, 11 months ago. js files: tsconfig. because it is a JS file with TS syntax, or it is published to npm as uncompiled source files. These errors can occur due to Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. js-react module but is throwing different import/export unexpected token errors during the t Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. By default, if Jest sees a One such issue is the SyntaxError: Unexpected token 'export' when working with Jest. js and make sure you use module. babelrc in your project's root directory and add this code there. Issue : I am using ts-jest to test my typescript library. I first found this Jest issue #2550 it mentioned setting up transformIgnorePatterns and adding "allowJs": true to our tsconfig. Some more details after edit: My this code is working fine with the given json file: As answers above have described, Jest doesn't support ES6 modules. Recently, I added the lightbox. In this particular setup, I appear to have needed the file to be babel. spec. js it works, unfortunately i havent found any docs about this why it does. js and TypeScript when using createUserWithEmailAndPassword in firebase/auth The issue started when updating Jest from 26. Load 7 more related questions Show fewer related questions Sorted by: 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 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 = {}; run jest @Abhishek is right on, worked for me, thank you! :) I had to create a jest. js extension and inside it using module. I refuse to write my packages with old-skool require() and module. I finally found a workaround for this. Install the babel packages @babel/core and @babel/preset which will convert ES6 to a commonjs target as node js doesn't understand ES6 targets directly. We could use babel-jest or ts-jest. This happens e. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your I am getting Unexpected token on the React Component Name while running npm test. Unexpected token 'export' 8 | import DeleteIcon from '@mui/icons-material/Delete'; 9 | import { useNavigate } from 'react-router-dom' > 10 | import dateFormat, { masks } from "dateformat"; | ^ 11 | 12 | export const TaskComponent: React. e. aaaaaa JSON Class: class org. 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 However, while I was using jest for testing I got it working by saving the json with . it's not plain JavaScript. I had this same issue, and jest --no-cache didn't fix it, but what /did/ fix it was removing both my node_modules folder and my package-lock. Parsing error: Unexpected keyword 'export' Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. import { configure } from 'enzyme'; // eslint-disable-line import/no-extraneous-dependencies import Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. when your code or its dependencies use non-standard JavaScript syntax, or when Jest Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. simple. 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 EDIT: Removing the rootDir parameter from the tsconfig. Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. This means that a file is not transformed through TypeScript compiler, e. 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). js file. 0. 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 Wait, wait, the JSON is valid according to JSON lint but your code does not show us how you parse it at all. I managed to solve it by installing the below presets and having the babel configuration file as follows: The content of index. How to move Distributed Points along a curve (Different from moving objects along a curve)? Jest encountered an unexpected token Jest failed to parse a file. json. This time I'm going to talk about a specific error: SyntaxError: Unexpected token 'export'. So, we need transform the code to a supported module type. 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. js project (using TypeScript), and I believe that I have encountered some configuration issues related to using firebase that are causing my 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 output will have a . FAIL app/tests/master. config. js and export an object. Unexpected token export - React, Material. Reload to refresh your session. exports. To add support for other extensions you need to write custom transformers. I think this happened because I had a different version of node activated when I 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. 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: I try to test my app created via create-react-app. js): 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. e. I recommend using ts-jest for simplicity. 2. ' Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. UPDATE who use create-react-app from feb 2018. npm install --save-dev @babel/core @babel/preset-env. 3. 6. When I copied the same library into my new monorepo, Jest will complain about export token inside one of ali-oss source in node_modules; Why Jest behave differently in monorepo vs normal repo? How to solve this weird jest module resolution? Files. json: Here is the babel-preprocessor. module. JSON file (object. 0 Jest - unexpected token export. Then I destructured the object in my main file. js:21 export {d I created an NPM package that uses modern JavaScript. gl/src/react/index. it 's not plain JavaScript. You switched accounts on another tab or window. Jest encountered an unexpected token: React App with JS. /auth. js", export default axios; Basically, jest runs on Node. Essentially, you need to add this to your Jest configuration: Jest encountered an unexpected token Jest failed to parse a file. babelrc automatically. 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. I. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration. 3 to 27. By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules". : Use this when you're using babel-jest to transpile your tsx (or jsx) files. json but in jest. tsconfig. Add a transform for js which uses babel-jest-- Jest encountered an unexpected token - SyntaxError: We want the babel-jest to parse the js files, and the lowDB and one of its dependency -steno. 3 but succeeded on jest 29. It means something is trying to interpret javascript file as JSON. Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. babelrc to babel. This usually means that you are trying to import a file which Jest cannot parse, e. Introduction: Jest, a powerful testing framework for JavaScript and TypeScript projects, occasionally encounters unexpected token errors while parsing files. parser. 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. Here is a snippet from my Jest configuration file npm install --save-dev babel-jest Usage. 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 am trying to set up firebase authentication on my Next. "jsx": "react-native" Same as the "preserve" option, but the output will have a . I have added content of babelrc , package. json and jest. json file and re-running npm i. json file fully fixes the attached zip file. Babel7 Jest unexpected token export. /App'; it('r 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). exports = { env: { test: { presets: [ [ '@babel/preset-env', { modules: 'commonjs', debug: false } ], '@babel/preset-flow', '@babel/preset-react' ], plugins In this guide, we’ll walk through creating a basic HTTP server in Node. { "presets": ["@babel/preset Jest encountered an unexpected token. babelrc file, you want something like this: React Jest test fails to run with ts-jest - Encountered an unexpected token on imported file 5 Jest encountered an unexpected token with Next. SyntaxError: Unexpected token 'export' The issue started when updating Jest from 26. Provide details and share your research! But avoid . Jest encountered an unexpected token - React with jest and enzyme. JSONObject Unexpected token END OF FILE at popsition 0 at org. ts includes the statement export * from '. I first found this Jest issue #2550 it mentioned setting up transformIgnorePatterns The jest encountered an unexpected token error can occur because of the inability to configure jest with create-react-app, jest cannot transcode specific packages or transpile modern The easiest way 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 I can't get my tests to run. zspjl fugmm mci amac zzovz tky txefb prg ruxy wbwg fqnbhg ktlduhq vscl acvf dtv