That's it, thank you been scratching my head for the last hour! Cannot find module 'react' from 'src/MyComponent.js' Require stack: src/MyComponent.js __tests__/MyComponent.js > 1 | import React from 'react'; This is happening not just with react, but with any node modules imported in the test, or imported in any module that the test imports. A place where magic is studied and practiced? With a test script of "mocha": "mocha --require @babel/register '**/__tests__/*' -R spec", I get a similar error: What the heck is going on here? WebA Jest transformer with source map support that lets you use Jest to test projects written in TypeScript. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The difference between the phonemes /p/ and /b/ in Japanese. Identify those arcade games from a 1983 Brazilian music video. I am setting a configuration to run my tests in a create-react-app + typescript app (from which I have ejected). Try the following steps: Delete the node_modules folder and install again. WebCannot find module 'babel-core' but @babel/core is installed Could not find a declaration file for module 'vuetify/lib' in a fresh vue js project Vue - Cannot use import statement outside a module My issue was that :0. What is the difference between 'it' and 'test' in Jest? However, I learned a case-sensitive change to a filename is not detected as a change by git, which is why the CI service still had the erroneous filename. WebWhich says that each module you import will be looked into node_modules first and if not found will be looked into src directory. npm -v: 5.6.0. npm ls jest or npm ls react-scripts (if you havent ejected): My configuration looks like this: After doing this, I was able to execute my tests without any problem. The projects feature can also be used to run multiple configurations or multiple runners. Adding this snippet to your package.json should allow you to take your custom name and map it to your actual folder: Ok I just fixed this by created an index file inside of the /shared folder and then exporting out the models that way (Though it should have still worked without the index file): import { moonHoldings } from '../../shared'; In my case, I got this error in a lot of instances inside my test file and the solution was to use file paths based mapping in the moduleNameMapper option inside my jest.config file. Using "moduleNameMapper" in your jest configuration will make test-resolve work as expected: https://gist.github.com/lydell/d62ce96c95c035811133a5396195da14. If I move my test file into src folder it will start working but then fail again with the same react error. where jest config on my package or on the node_modules jest config? Also note that the APIs Jest uses to implement ESM support are still considered experimental by Node (as of version 18.8.0 ). Exports and module factories and mock | by Tyler Hawkins | codeburst Write Sign up Sign In 500 Apologies, but something went wrong on our end. @testing-library/react version: 13.2.0; Testing Framework and version: jest 28.1.0 I have "test": "jest" in my package.json scripts. Jest React Docs. ts-jest can resolve this problem perfectly! And here is its content: As you can see the "module" is commonjs here whereas in the default configuration it is esnext. delete package.lock.json file by running rm -f package-lock.json. Ref Pourya Da Feb 28, 2021 at 7:15 Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2, TypeScript getting error TS2304: cannot find name ' require'. 22 I was struggling with the same problem and actually it turns out that a simple change seems to do the trick. Surly Straggler vs. other types of steel frames. : commented Replacing broken pins/legs on a DIP IC package. "After the incident", I started to be more careful not to trip over things. this one saved me after 3 days of solving this error dayum. delete package.lock.json file by running rm -f package-lock.json. Start using ts-jest in your project by running `npm i ts-jest`. JEST: Cannot find module 'src/index from 'index.js' Resolver.resolveModule (node_modules/jest-resolve/build/index.js:276:11) node_modules index.js import { a } from 'src/index' 'src/index' import { a } from 'src/index' For instance, we write "jest": { "roots": [ "", "/home/some/path/" ], "modulePaths": [ "", "/home/some/other/path" ], "moduleDirectories": [ "node_modules" ], } Find centralized, trusted content and collaborate around the technologies you use most. Making statements based on opinion; back them up with references or personal experience. I saw similar quesitons, but nothing quite like this. The strange thing is that it works on my local Win10 machine - even when I run the tests in a similar docker-container (node 12.12.0). Did any DOS compatibility layers exist for any UNIX-like systems before DOS started to become outmoded? Rather than delete the question, I'll leave this here if anyone ever has this specific case happen to them. TypeScript's official documentation recommends using relative paths for our own modules. Latest version: 5.16.5, last published: 7 months ago. Does Counterspell prevent from any further spells being cast on a given turn? How can I mock an ES6 module import using Jest? Copy link tettoffensive commented May 17, 2022. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. So, reading the documentation I found this solution: Open the tsconfig.json and jest.config.js files (or equivalent) In tsconfig.json, find your absolute paths definition. this test passes on my local machine, but it fails in the CI service we are using. We can fix this by telling Jest to use the same resolution as webpack. The projects feature can also be used to run multiple configurations or multiple runners. As many here pointed out moduleNameMapper in jest.config.js needs to define paths specified in tsconfig.json. And a drawback is that it's now easy to accidentally refer to a path that you shouldn't use in the lib (because the IDE now always uses all paths for code-assistance). Not the answer you're looking for? Is there a proper earth ground point in this switch box? Ref Pourya Da Feb 28, 2021 at 7:15 Find centralized, trusted content and collaborate around the technologies you use most. Why do academics stay as adjuncts for years rather than move around? Do new devs get fired if they can't solve a certain bug? I have a __tests__ directory in my root folder. Which says that each module you import will be looked into node_modules first and if not found will be looked into src directory. *)": "/src/barFoo/$1" }, Share Improve this answer Follow answered Aug 10, 2020 at 15:28 Azeem Chauhan 409 5 8 Add a For me, it was a Git issue. To fix it, needed to include @reach/router as a dependency into the package.json file within my project (not my_custom_module). Why are physically impossible and logically impossible concepts considered separate in terms of probability? In tsconfig.json, find your absolute paths definition. vegan) just to try it, does this inconvenience the caterers and staff? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Already have an account? There's also an ESLint rule that explains why absolute paths should be avoided. The @ here is an arbitrary character to define the root project, you can define your own. In my case the true filename is src/actions/selectUserByID (notice the uppercase letter 'D'), How do I align things in the following tabular environment? Tyler Hawkins 2.1K Followers Senior software engineer. Create a file, call it whatever you want, I called it vscode.js and copy this line. WebESLint rules for Jest. If I were to run my package through travisci, it would run npm install and npm test, and it would never install these dependencies or be able to use them in the tests. This is the ts configuration used for test. Hi I am trying to use Jest, but it keeps giving an error of cannot find module. You can use this jest.config.js: module.exports = { preset: 'ts-jest', moduleNameMapper: { '^~/ (. My configuration looks like this: (This was something that solved my issue). If you take a I'm using jest, and I'm having this problem. What am I doing wrong here in the PlotLegends specification? You can have an unlimited amount of projects running in the same Jest instance. Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? *)': '/src/$1', Jest + Typescript + Absolute paths (baseUrl) gives error: Cannot find module, https://kulshekhar.github.io/ts-jest/docs/getting-started/paths-mapping#jest-config-with-helper, https://basarat.gitbooks.io/typescript/docs/testing/jest.html, How Intuit democratizes AI development across teams through reusability. Just add "modulePaths" to your package.json. I had a similar problem. It looks like moduleNameMapper is used when I have mapped my paths. Recovering from a blunder I made while emailing a professor. Now from here on, VS Code will automatically import using the relative paths. Can Martian regolith be easily melted with microwaves? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Can Martian regolith be easily melted with microwaves? I am using jest + enzyme. If you install the package but you still get the error, then follow the steps below: delete the node modules folder by running rm -rf node_modules. I'm using Nest. thanks, Cannot find module 'src/api/2 - services/services.module' from 'api/1 - controllers/wizard-controller/wizard.controller.spec.ts', And inside my package.json, in Jest config, I had the following property: Thanks, Thanks. Tyler Hawkins 2.1K Followers Senior software engineer. The projects feature can also be used to run multiple configurations or multiple runners. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. node -v: v8.11.3. I'm not sure if this could bring side effects on tests. Making statements based on opinion; back them up with references or personal experience. You can set this up in package.json or the Jest configuration file. Sign in to comment Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2, Could not find a declaration file for module 'module-name'. Simply use the auto-import suggestions and import them back. My main file App.js which I am trying to test is within my src folder. Thanks for contributing an answer to Stack Overflow! Why is this sentence from The Great Gatsby grammatical? Minimising the environmental effects of my dyson brain, Styling contours by colour and by line thickness in QGIS. If you take a Let me know if you have feedback ;). To do so, well need to define moduleDirectories within the jest.config.js: jest.config.js const path = require("path") module.exports = { rootDir: ". How can I check before my flight that the cloud separation requirements in VFR flight rules are met? Asking for help, clarification, or responding to other answers. WebJest ships with experimental support for ECMAScript Modules (ESM). To subscribe to this RSS feed, copy and paste this URL into your RSS reader. What's the difference between a power rail and a signal line? What is a word for the arcane equivalent of a monastery? It would be the best for you to share your code with codesandbox or via github repo, @StefanZivkovic I have been messing around with a project as well as following a tutorial. Kind of an old thread but recently, on top of the other suggestions of adding the paths on "moduleNameMapper": on jest.config.js and "paths": on tsconfig.json, I also had to include my test folder so the compiler could recognize it. Module Mocking in Jest. Asking for help, clarification, or responding to other answers. For the latest status check out the issue and the label on the issue tracker. "Cannot find module" when running unit tests on node.js with react as peer dependency in common package, SyntaxError with Jest and React and importing CSS files, Setting up Jest and Enzyme to test React 15 cannot find module react/lib/ReactTestUtils, The create-react-app imports restriction outside of src directory. The implementation may have bugs and lack features. The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. try to remove the roots from jest.config.js file, since testRegex has __tests__ by default it should pick you test files automatically. Following answer to modify moduleDirectories resulted in this error: From reading the docs it appears that this a list of additional directories and so node_modules is unnecessary. JEST: Cannot find module 'src/index from 'index.js' Resolver.resolveModule (node_modules/jest-resolve/build/index.js:276:11) node_modules index.js import { a } from 'src/index' 'src/index' import { a } from 'src/index' Good lord thanks @RyanPWalker for the insight! .. Latest version: 27.2.1, last published: 2 months ago. *)": "/src/barFoo/$1" }, Share Improve this answer Follow answered Aug 10, 2020 at 15:28 Azeem Chauhan 409 5 8 Add a This step may be tedious depending on the size of your project but it's worth it in the long run. WebJest caches transformed module files to speed up test execution. WebJest ships with experimental support for ECMAScript Modules (ESM). And your problem is in the jest tests frontend/ and it has a tsconfig like: Then adding this to the root jest.config should fix the issue: Sort of obvious, but adding this answer since I didn't see this case in the other answers, and monorepos are still a thing :). The fastest (and the most fun) way to resolve the issue is to submit a pull-request yourself. WebA Jest transformer with source map support that lets you use Jest to test projects written in TypeScript. Is it correct to use "the" before "materials used in making buildings are"? Since it's looking into src directory you should use: import AppContainer from 'views/app'; Please note that this path is absolute to the src directory, you do not have to navigate to locate it as relative path. This may be obvious, but if you include src path in imports like " from 'src/'", add this: I added package.json then its works! rev2023.3.3.43278. This works fine when I run in debug mode ( yarn start ). jest-unit.json (or your jest config json file). There are 2991 other projects in What video game is Charlie playing in Poker Face S01E07? What can a lawyer do if the client wants him to be acquitted of everything despite serious evidence? To learn more, see our tips on writing great answers. where is the root of the directory containing your Jest config file or the package.json. Custom jest matchers to test the state of the DOM. To do so, well need to define moduleDirectories within the jest.config.js: jest.config.js const path = require("path") module.exports = { rootDir: ". Already have an account? It can be simplified by pathsToModuleNameMapper() method in ts-jest/utils. Refresh the page, check Medium s site status, or find something interesting to read. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2, Absolute imports not working in jest tests (*.test.ts files), Unable to run tests because Nest cannot find a module, Jest Path Mapping Error: Could not locate module xyz mapped as: abc, How do I import from a relative path like "/utils" within my "src" folder in Jest + RTL Tests, Problem mapping path in ts-jest (TypeScript Jest), module cannot be found, non-relative imports - TypeScript - nothing works, ts-jest failing in Docker container only, passes locally. npm -v: 5.6.0. npm ls jest or npm ls react-scripts (if you havent ejected): This can also be caused by absolute imports present in the globalSetup file (or any files it references). Thanks, Thanks for your answer. - the incident has nothing to do with me; can I use this this way? after you made the changes don't forget to restart your test watchers. Connect and share knowledge within a single location that is structured and easy to search. Let's see what solutions we have to apply module aliasing. Jest Docs Webpack, Here is a link to the docs that explains how to set up Jest with React (Without using Create-React-App). Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. *)$': '/$1', }, // etc }; 2 stevenpollack commented on Sep 14, 2021 any reason we can't have ts-jest resolve the tsconfig paths automatically? What is the difference between 'it' and 'test' in Jest? Is it possible to create a concave light? import statement with absolute path looks like: import statement with relative path looks like: VS Code by default uses absolute path as shown above, when we auto-import using code completion or Command/Ctrl + .. We need to change this default setting to use relative paths. 'path');. : : ],: : .join(__dirname, 'test-jest', 'vscode.js') }, }; my vscode file is in test-jest/vscode.js place yours wherever you need! You can adapt according to the module you want. 'path');. I do not have any jest.config.js or any jest property in my package.json - I didn't think I needed one to specify that jest should be looking for these modules in the node_moduldes folder. Why do academics stay as adjuncts for years rather than move around? Short story taking place on a toroidal planet or moon involving flying. Connect and share knowledge within a single location that is structured and easy to search. GitHub JsDaddy / ngx-mask Public Notifications Fork 283 Star 1k Code Issues 166 Pull requests 2 Actions Projects Security Insights New issue cannot find module 'ngx-mask' when running jest on angular 13 #962 Closed entry in "foo" package. Following @Crysknight answer, I came up with a solution for my project: Only adding main entry in package.json didn't worked. Making statements based on opinion; back them up with references or personal experience. Hope this helps somebody. To learn more, see our tips on writing great answers. Sign in to comment This means when you are using test.each you cannot set the table asynchronously within a beforeEach / beforeAll. For those using an absolute path but not using named mappings, this worked for me: This error occurs because of using absolute paths in the import statements of our TypeScript/Nest.js/Angular projects while using Jest. Is there a single-word adjective for "having exceptionally strong moral principles"? to your account, rootDir/content/private/react/package.json - npm run test works fine from command line, rootDir/content/private/react/components/ - Test files are in this directory. What is the difference between 'it' and 'test' in Jest? But when I run my test ( yarn test ), I get this error: So it looks like jest is not able to resolve this absolute path although I have set it up in my tsconfig.json. Cannot find module 'enquire.js' from 'slider.js', Jest Cannot find module 'setupDevtools' from 'setup.js', Missing module when running Jest tests with Arangodb, typescript - jest - tsconfig : Cannot find module '../' at Resolver.resolveModule (node_modules/jest-resolve/build/index.js:259:17), Surly Straggler vs. other types of steel frames. What's the difference between a power rail and a signal line? So I added a console.log to show me the error message in node_modules/jest-resolve/build/resolver.js. You can add both relative and absolute paths. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Why do you have App imported twice? Webwith the cloned version after upgrading the dependencies: see Update deps & Jest config for Windows ijdickinson/vue-cli-jest-problem#1 (needed to change the jest config for Windows following a fix in the jest generator which will be available in the next release). Find centralized, trusted content and collaborate around the technologies you use most. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Latest version: 5.16.5, last published: 7 months ago. You just need to add a resolve.alias property in your webpack configuration. All the files below are located out of my src folder. Minimising the environmental effects of my dyson brain, using absolute paths (src/MyComp) to import components inside other components (e.g. You need to do little configuration for your jest test. '/path/to/module-name.js' implicitly has an 'any' type. If you take a 0 found instead, inputting a letter into jest test with enzyme, React Jest Enzyme : Unable to pass router parameter, Jest Enzyme test throws unexpected token error. and I used the the configuration mentioned by @Antonie Laffargue (add/edit property moduleDirectories: ['node_modules', 'src']), it works perfectly. rev2023.3.3.43278. Is it possible to rotate a window 90 degrees if it has the same length and width? 5 comments Comments. Has anyone found a solution? Disconnect between goals and daily tasksIs it me, or the industry? try to remove the roots from jest.config.js file, since testRegex has __tests__ by default it should pick you test files automatically. Here is a Gist code snippet for that: Here is how I got moduleNameMapper working. @reach/router was listed as a peer dependency, i.e. And have you created your app with Create-react-app command or the app template is created by your hand? import { moonHoldings } from '../../shared/models'; The Jest config section of my Package.json. As its currently written, your answer is unclear. I just specified a baseUrl. 'path');. Depending on your setup it might be, npm i jest-expo jest or expo install jest-expo jest. Is this still a working solution for you? Making statements based on opinion; back them up with references or personal experience. If you preorder a special airline meal (e.g. 5 comments Comments. After trying that it gave me a new error. " "rootDir": "src", So I think that my Jest was trying to search the modules starting with 'src' already inside 'src' folder (due to rootDir property). Go to VS Code settings and search for a setting: Import Module Specifier. Asking for help, clarification, or responding to other answers.