Angular jest unexpected token export example Step 2: Configuration. 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', Core problem is that ts-jest (jest-preset-angular is based on ts-jest) does not transpile JS files. js file, you can add the following lines. You will need to tell Jest to compile react-navigation-tabs by whitelisting it in the transformIgnorePatterns option in your Jest config. babelrc to babel. But finally, I have fixed this. js"; ^^^^^ SyntaxError: Unexpected token 'export' The Jest config transformIgnorePatterns does not work in this repo. e 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 . configPath - path to jest config file, relative to project root (or src/ directory in case of non-project app), defaults to jest. The Jest configuration might be written is TypeScript, but you should explicitly specify the path to the jest. g. 3. 2) Add a . So after updating jest, jest-preset-angular and angular to the latest version I got this fixed by using moduleDirectories: ['node_modules', '<rootDir>'], in my jest. mock calls to load the mocked modules - the same applies to modules which load the mocked modules. The described issue is occurring within an nx-workspace, using the mentioned versions above of angular, jest, keycloak-angular and keycloak-js. /blocks"; ^^^^^ SyntaxError: Unexpected token 'export' More specifically, in the top level index. Other extensions are also supported. yarn add --dev babel-preset-env You should already have babel-jest. js file specifically for the tests. /abstractScene. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration. scss files needs to be compiled into css, and you need to import and use the css files. From the above suggestions, we can tell Jest not to parse ES modules in node_modules. 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. Tasty treats for web developers brought to you by Sentry. json when using create-react-app. config. sharikovvladislav changed the title Can not unit tests through jest because of SyntaxError: Unexpected token export Can not run unit tests through jest framework because of SyntaxError: Unexpected token export Aug 20, 2017 It's worth noting if you're using Next. 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). I'll look into this more. Step 1: installation: npm i -D ts-jest @types/jest or yarn add --dev ts-jest @types/jest. import nextJest from 'next/jest. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Jest encountered an unexpected token Jest failed to parse a file. first = first;}} # Set the type property to module in your package. I can change foo. exports = config; Unexpected token export jest angular. So for the Jest tests to run, it first needs to be transpiled by Babel. Not one bit. json for jsdom. next/jest. 6; jest: 29. You can add any ES module you want to the array. The import will then import the mocked version of the Sentry module which bypasses actually importing the Sentry package. SEE EPISODES Saved searches Use saved searches to filter your results more quickly There are several changes that I needed to get this to work. I was using jest 27, which works fine now. Jest Unexpected identifier - Angular. Jest: SyntaxError: Unexpected token 'export' Hot Network Questions Polynomials with all but one coefficient equal to 1 How can I ensure that my Git projects have not been tampered with? Could Earth plants survive on a planet that orbits a K-Type Star? As a non-EU citizen with a French titre de séjour, is it possible to stay in Switzerland Listen to the Syntax Podcast. When using a JS Babel config (as opposed to a . For example Unexpected token export jest angular. 12. config as in jest-preset-angular angular ver 13 example (both default and esm). To have some of your "node_modules" files transformed, you can specify a custom "transformIgnorePatterns" in your config. You will need to tell Jest to compile react-navigation-tabs by whitelisting it in the transformIgnorePatterns option in module. Notifications You must be signed in to change notification settings; Fork 306; Star 885. To see what this configuration looks like, visit the jest-preset-angular documentation. To fix this issue, one can do the following: Install babel-jest, @babel/core and @babel/preset-env; Create a . babelrc and some dependencies, One such issue is the SyntaxError: Unexpected token 'export' when working with Jest. The configuration is merged on top of the default configuration, so there is no need to specify the I don't even know where to start with this one as I am not too familiar with testing and using this package for jest testing. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support Jest encountered an unexpected token. exports = { transform: { Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Jest not parsing es6: SyntaxError: Unexpected token import. ts. ts to your source directory with content like: /** @type {import('jest'). script. Jest runs with node, there for import/export brokeup the node process eather change them import/export to require. See this guide for example to get more info about ES modules. 0 $ npm -v 6. 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. spyOn Try the following: 1) install the following packages: babel-jest, babel-preset-env. export { download }; ^^^^^ SyntaxError: Unexpected token 'export' javascript; function; export; Share. 7. I have another repo where transformIgnorePatterns works, but then Jest RUN hangs without errors. ES6 code needs to be compiled before it can be run by Jest. module. You’ll gain a better understanding of how HTTP // ⛔️ Uncaught SyntaxError: Unexpected token 'export' export class Person {constructor (first) {this. By configuring this option correctly, we can exclude The SyntaxError Unexpected Token Export Jest error is a common error that occurs when you try to export a Jest function or variable. 56. 'some-image. To give an idea, this was the relevant part of my package. babelrc that wasn't getting picked up 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. To give some context, the Swiper carousel component is declared in a module and exported as one of the libs in the pr In this example I get the error: \node_modules\@babylonjs\core\index. ts but that is not the solution. Jest encountered an unexpected token - import (Angular CLI 6) 0. Jest encountered an unexpected token - import (Angular CLI 6) 9. Jest fails when CSS uses @import. Asking for help, clarification, or responding to other answers. To fix this error, make sure that the module has a default export or use the export keyword with an object or function. jest fails to import the import of my import which is causing npm run test command to fail with SyntaxError: Unexpected token 'export' at first line of my bar. it's not pla Configure jest. You switched accounts on another tab or window. I’m going crazy. Jest: SyntaxError: Unexpected token export. First of all, thanks for bringing Jest to Angular! I previously had configured Jest in my Angular project by myself. 7; angular: 19. I refuse to write my packages with old-skool require() and module. 'some-image') data-testid: Same as data-jest-svg-name, but works with @testing-library/react getByTestId() So if you want to find the rendered element in your test by attribute you have to pass in some other attributes. This happens e. js:2 export * from ". igor. , it's not plain JavaScript. To fix this error, you need to add the The jest unexpected token export error occurs when Jest encounters an export statement that does not follow the expected format. 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. This should fix the issue when using @agm/core for an Angular 6 app is being used with jest. js that you might be affected by this issue. localStorage = localStorageService; > 17 | this. 1. exports = { env: { test: { presets: [ [ '@babel/preset-env', { modules: 'commonjs', debug: false } ], '@babel/preset-flow', '@babel/preset-react' ], plugins Here’s what each attribute of our Jest setup does: preset: specifies that we’ll be using the jest-preset-angular preset for our setup. Apologies if this issue has already been TL;DR: Jest not yet supports the field "exports" in package. json, but since Jest does not yet support it, Jest uses the "main" field in package. This issue happens because Jest uses Babel behind the screen to create coverage reporter. cookieService = cookieService; | ^ 18 | } 19 | 20 | public set(key, value Then i'm start the app by command ng serve in console i see error: VM1018:2297 Uncaught SyntaxError: Unexpected token export at eval (<anonymous>) at webpackJsonp. This worked for me from Jest docs:. I found this blog post from Brian Love, followed it, and was able to get the basics up. ts and change the import in bar. foo. Sass helps you write more organized and maintainable code, but it's not a vaild css code, thus, browsers don't know how to read it. So, here is the solution. For this example foo. exports = {}; Share. October 23, 2023. I have this excpetion Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. To mock modules in ESM, you need to use require or dynamic import() after jest. By default, if Introduction: Jest, a powerful testing framework for JavaScript and TypeScript projects, occasionally encounters unexpected token errors while parsing files. To add support for other extensions you need to write custom transformers. Jest encountered an unexpected token - import (Angular CLI 6) 3. json which exports the CommonJS version. I recommend using ts-jest for simplicity. For example: SyntaxError: Unexpected token 'export' or SyntaxError: Cannot use import statement outside a module I'm using babel-jest as the transform for my TypeScript Jest doesn't use Webpack so it doesn't know how to load other file extensions than js/jsx. Adding the "parserOptions" property to your . For example I was having the same failure (also using Babel, Typescript and Jest), it was driving me crazy for hours! Ended up creating a new babel. Hey @Alucardz!So sorry about my delay here, the past week or so has been nuts 😅 It looks like this is actually a problem with the package itself — specifically it doesn’t have a main field that points to its CJS bundle. The problem is happening because jest now looks at the "browser" field in package. js. babelrc automatically. I use Ionic, and was looking to get things going with Ionic 4 and Angular 6 with Jest. babelrc, for example) Jest also compiles modules in node_modules. In order to use lodash-es, I had to set transformIgnorePatterns to inlude the path to lodash-es: "jest": { "preset": "je $ node -v v14. So running tests first threw errors "Jest encountered an unexpected token" and "SyntaxError: Unexpected token 'export'" for this line in my code: import { Navigation } from "swiper"; Cannot find module 'swiper_angular' on unit Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. answered May 5, 2017 at 21:28. In this way the jest configuration will not look in the specific package, for example jest Issue : I am using ts-jest to test my typescript library. mock call, the tests pass for me again. Unexpected token export jest angular. Improve this answer. js instead of ['node_modules', '. /' to '<rootDir>'. Then update your jest configuration: Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. 7. And Jest doesn't like it. Current Behavior. Facing issue while running Jest test cases in combination of D3 with Jest and angular. Jest provides babel-jest transpiler out of the box. 12. js:; export const magicNumber = 42; Jest encountered an unexpected token Jest failed to parse a file. It is widely used by developers to test their JavaScript code. I have issues with Jest picking up an internal library, Jest would display 'unexpected token' errors wherever I had my imports from this library. mock ('@sentry/angular-ivy', => ({setUser: () => {}})); import * as SentryAngularIvy from '@sentry/angular-ivy'; const sentrySetUser = jest. By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules". If I add the jest. export * from ". I see the problem in jest 28 and above. 2 Jest encountered an unexpected token - import (Angular CLI 6 Jest SyntaxError: Unexpected token 'export' CodewCaro. js and export an object. I use to do a workaround to bypass this. Jest encountered an unexpected token in Jest is a JavaScript testing framework that is designed to be simple, fast, and efficient. babelrc file at the your project root. So to give you some steps to follow: rename your . json section: Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Your code has to be in a module, as recognized by whatever environment is involved. Jest encountered an unexpected token This usually means that you are trying to import a file which Jest cannot parse, e. Modified 3 years, 1 month ago. js using TypeScript. I had a large . . babelrc at the same place where Jest config file locates and define the necessary Babel plugins. Code; Issues 25; Pull requests 5; Actions; Projects 0; Security; Unexpected token export Could anyone please explain this issue, or at least point me in the right direction. js makes it hard to transpile modules in node_modules, but you can modify the baked config in jest. json file. 8 $ ng new test Unknown error: SyntaxError: Unexpected token 'export' $ ng -v Unknown error: SyntaxError: Unexpected token 'export' I installed it via sudo npm install -g @angular/cli which gave no errors. You signed in with another tab or window. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax. Testing Angular application using Jest - Jest encountered an unexpected token. Unexpected token errors in ESLint parsing occur due to incompatibility between your development environment and ESLint's current parsing capabilities with the ongoing changes with JavaScripts ES6~7. So I need something to do that work. Config} */ const config = { verbose: true, }; module. Provide details and share your research! But avoid . json file To solve the error, set the type property to module in your package. create and add file jest. json for my Types package: This is necessary because babel-jest relies on a traditional Babel config file, not webpack. json. Ask Question Asked 6 years, 6 months ago. ts file. With Jest and the jest-preset-angular in place, the Jest Angular testing in most of the projects "just worked" and was pretty fast out of the box, at least until the release of Angular 12! Jest testing of Angular 12 (and higher) got dramatically slower because Angular stopped shipping UMD bundles which were used by the Jest. 0. In your jest. I have been facing this problem for a very long. My case was module federation shared dependencies caused a legacy package's css not to get picked up. 14. Test suite failed to run. Internally, preact provides a "browser" field, but the file is ESM, which jest does not natively support without a babel transform. Files in my src folder:. The problem is that Node. Get tips and tricks from Wes Bos and Scott Tolinski. Some react-native libraries ship uncompiled ES6 code. 9. Improve this question. Unexpected token export with jest. Jest cannot seem to parse the dependency because its public api file includes "export I am using Swiper v8 for my Angular v12 project that resides in an Nx monorepo. Option 1: create a jest configration file jest. 0; Problems. 2; keycloak-js: 26. Why did Jest encounter unexpected token? 3. Viewed 3k times Unexpected token export 15 | this. Out Configuring transformIgnorePatterns: To address unexpected token errors in Jest, the transformIgnorePatterns option plays a crucial role. eslintrc is no longer enough for particular situations, such as using This could be a temporary workaround until babel configs are fixed. 5. The first method works if for some reason you have to import a css file from node_modules directly. 2. tsx to a relative import: import { MyModel, Type } from '. js and make sure you use module. angular; jestjs; ionic-native; ionic4; Share. mjs like this:. Since version 7 Babel has supported JS configs as babel. sessionStorage = sessionStorage; 16 | this. Example: In this guide, we’ll walk through creating a basic HTTP server in Node. exports = {}; run jest Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Jest failed to parse a file. 81 1 1 gold badge 1 1 silver badge 5 5 bronze badges. Jest - unexpected token export. I have about 27 fails and all have a variety of : FAIL src/Components/c keycloak-angular: 19. You signed out in another tab or window. Unexpected token 'export' polonmedia changed the title [Bug]: Jest encountered an unexpected token - no SyntaxError: Unexpected token export jest occurs when you try to export a module using the export keyword but the module does not have a default export. ; roots: module. For example For those that travelled this far. js to foo. The "issue" is that Jest only wants to process CommonJS-style code. js uses the ESM version since it understands the "exports" field 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 Unexpected token export jest angular. 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. /common/model/MyModel';. 34. Follow asked Sep 12, 2021 at 17:09. As a side note, I configure my Jest in an external file, and the contents are shown here as I did change a few things, but have my tests running now with Jest under Angular 6. igor script. { "presets": ["env"]} For anyone using create-react-app, only certain jest configurations can be changed in package. data-jest-file-name: The name of the file (e. js is a local file, not a node module. Jest SyntaxError: Unexpected token 'export' Caroline Cah. I tried to adapt my jest configuration with suggestion mentionned in this issue but is not work, i have same problem. However, despite following dozens of how-tos and tutorials, I am not able to fix the issue below. These errors can occur due to 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 ES6 code needs to be compiled before it can be run by Jest. ts of the Types package, which was "exporting everything out". 0. Let me know if this works for you or if you have other ideas. /', }) // add any custom config to be passed to Jest /** @type We could use babel-jest or ts-jest. I wasnt able to fix the problem with the solution provided by @fadingBeat but it inspired me to change '. js' const createJestConfig = nextJest({ dir: '. Jonathan Stray jest unexpected token when importing css. it's not plain JavaScript. /'] I also had to add the transformIgnorePatterns This issue happens because Jest uses Babel behind the screen to create coverage reporter. Module mocking in ESM . Since ESM evaluates static import statements before looking at the code, the hoisting of jest. Follow Unexpected token export jest angular. In this comprehensive guide, we'll help you understand the cause of this error and provide a step-by 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. 28. This can happen for a variety of reasons, jest. AFAIK by convention this must be in the root of your project, alongside thymikee / jest-preset-angular Public. Test suite failed to run Jest encountered an unexpected token Jest failed to parse a file. Reload to refresh your session. Follow edited May 17, 2017 at 19:32. I tried updating jest to the latest version (28) and started experiencing the classic TypeScript errors that you get when there are Babel / compiling TypeScript issues. mock calls that happens in CJS won't work for ESM. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your This is happening because Babel 7 no longer loads your . ts-jest does not recognize es6 imports. I managed to solve this error following the link below I created an NPM package that uses modern JavaScript. ESM mocking is I am just using the sample side menu template and adjusting the components to run Jest. The Jest doc about Testing React Native Apps includes a section about compiling dependencies that don't ship pre-compiled code. See the relevant package. Babel7 Jest unexpected token export. To put this in different terms, I'm using Jest to test a package with "modern" JavaScript, which in-turn imports another package with "modern" JavaScript. svg') data-jest-svg-name: Only the name portion of the file (e. cmukv ahq mnlh dwe xgtnbi yzig liyxkq gypig cowprxc uasr frhmu momlyc dwrcf llleuy wscdxbx