angular-devkit/build-angular:jest

Run individual Jest unit test for Angular 16+ with ng test

stackoverflow.com › questions › 76270270 › run-individual-jest-unit-test-for-angular-16-with-ng-test

I was able to resolve this with two steps.

Install @angular-builders/jest if not using latest version of angular you may want to specify the version ie if on angular 16 run npm install @angular-builders/jest@16 otherwise just a npm install @angular-builders/jest will be enough
update the test.builder in angular.json config to use @angular-builders/jest:run

my final angular.json test config looks as follows:

"test": {
  "builder": "@angular-builders/jest:run",
  "options": {
    "polyfills": [
      "zone.js",
      "zone.js/testing"
    ],
    "tsConfig": "tsconfig.spec.json"
  }
}

Answer from Derrick Awuah on Stack Overflow

GitHub

github.com › angular › angular-cli › issues › 25668

Support jest cli options when using @angular-devkit/build-angular:jest · Issue #25668 · angular/angular-cli

August 11, 2023 - { "configurations": [ { "type": "node", "name": "vscode-jest-tests.v2", "request": "launch", "console": "integratedTerminal", "internalConsoleOptions": "neverOpen", "cwd": "${workspaceFolder}", "runtimeExecutable": "ng", "args": [ "test", "etips-utils", "--run-in-band", "--watch-all=false", "--test-name-pattern", "${jest.testNamePattern}", "--test-path-pattern", "${jest.testFile}" ] } ] } The project https://github.com/just-jeb/angular-builders implements an approach to allowing jest cli options.

Author rafagsiqueira

DEV Community

dev.to › fransaoco › how-to-set-up-jest-in-angular-19-step-by-step-guide-1c2p

How to Set Up Jest in Angular 19 (Step-by-Step Guide) - DEV Community

April 21, 2025 - { "extends": "./tsconfig.json", "compilerOptions": { "outDir": "./out-tsc/spec", "types": ["jest", "node"] }, "include": [ "src/**/*.spec.ts", "src/**/*.d.ts" ] } "test": { "builder": "@angular-devkit/build-angular:jest", "options": { "tsConfig": "tsconfig.spec.json" } } "compilerOptions": { "baseUrl": "./", ...

Discussions

@angular-devkit/build-angular:jest Memory Leak and slower test execution speed on CI

Command test Is this a regression? Yes, this behavior used to work in the previous version The previous version in which this bug was not present was 15 Description Would someone be able to help me... More on github.com

github.com

January 9, 2024

Is Jest still going to be integrated officially with Angular?

As r/iamjediknight (and others) have already mentioned, Vitest is generally considered the more modern tool. It looks like the Angular team is also open to going directly with Vitest, skipping Jest—which, from my side, would be great news. I really hope this happens. More on reddit.com

r/angular

March 3, 2025

Build unit tests specifically

In an Angular CLI context, I expect this is probably being way too specific and nuanced with the build process to be useful. As much as I want things to work this way, I get that most users probably don't and it likely isn't worth the configuration and complexity cost. ... area: @angular-devkit/b... More on github.com

github.com

October 25, 2023

unit testing - How to migrate from karma to jest in Angular 17 - Stack Overflow

I have recently found out about this blog post about the experimental jest support since angular 16. Based on what I understood I did the following steps: Installed the following dependencies: npm More on stackoverflow.com

stackoverflow.com

Stack Overflow

stackoverflow.com › questions › 76270270 › run-individual-jest-unit-test-for-angular-16-with-ng-test

intellij idea - Run individual Jest unit test for Angular 16+ with ng test - Stack Overflow

Top answer

1 of 9

2 of 9

Jest relies on jsdom, which is missing polyfills for things that Chrome has implemented and are widely used by libraries. So anyone using Jest that has a dependency that uses TextEncoder has to decide if they want to write their own polyfill, switch to happydom, or remove the dependency, or my colleague’s favorite method - deleting affected .spec files.

Medium

medium.com › @philip.mutua › setting-up-jest-in-your-angular-16-project-3638ef65f3a3

Setting Up Jest in Your Angular Project | by Philip Mutua | Medium

December 10, 2024 - In this blog, we’ll embark on a journey to harness the power of Jest, a potent testing framework, coupled with jest-preset-angular, to elevate your testing experience in Angular projects. Let's dive in and explore how you can unlock the full potential of testing within your Angular applications. If you haven’t already, use the Angular CLI to create a new Angular project: ng new your-angular-project cd your-angular-project · Go to the Package.json file and remove all these packages · "devDependencies": { "@angular-devkit/build-angular": "^14.2.13", "@angular/cli": "~14.2.13", "@angular/co

Medium

sergeygultyayev.medium.com › angular-v16-surviving-the-preview-jest-793744b9eb31

Angular v16 surviving the preview. Jest | by Sergey Gultyayev | Medium

August 23, 2023 - To use Jest instead of Jasmine we need to uninstall all Jasmine/Karma dependencies and install Jest npm i jest . After that, we should update the architect.test config in angular.json with the following value: "test": { "builder": "@angular-devkit/build-angular:jest", "options": { "tsConfig": "tsconfig.spec.json", "polyfills": ["zone.js", "zone.js/testing"] } }

GitHub

github.com › angular › angular-cli › issues › 25189

@angular-devkit/build-angular:jest creates invalid test suite · Issue #25189 · angular/angular-cli

May 11, 2023 - Running tests using ng test with the new @angular-devkit/build-angular:jest builder results always in at least one failed test suite:

Find elsewhere

Google Bing Mojeek

npm

npmjs.com › package › @angular-builders › jest

angular-builders/jest

January 14, 2026 - Jest runner for Angular build facade. Allows ng test run with Jest instead of Karma. Latest version: 21.0.3, last published: 3 months ago. Start using @angular-builders/jest in your project by running `npm i @angular-builders/jest`. There are 2 other projects in the npm registry using @angular-builders/jest.

      » npm install @angular-builders/jest

Published Jan 14, 2026

Version 21.0.3

GitHub

github.com › angular › angular-cli › issues › 25697

Integrate jest-fail-on-console in @angular-devkit/build-angular:jest · Issue #25697 · angular/angular-cli

August 19, 2023 - Integrate the jest-fail-on-console utility into the @angular-devkit/build-angular:jest configuration.

Angular

blog.angular.dev › moving-angular-cli-to-jest-and-web-test-runner-ef85ef69ceca

Moving Angular CLI to Jest and Web Test Runner | by Doug Parker | Angular Blog

April 27, 2023 - We have seen significant momentum in the Jest ecosystem and are excited to help bring those benefits to the Angular community. Please note that this is still experimental and not quite ready for use in business-critical applications, but you can give it a try by first updating to v16 once it is released and then modifying your `angular.json`: { "projects": { "my-app": { "architect": { "test": { "builder": "@angular-devkit/build-angular:jest", "options": { "tsConfig": "tsconfig.spec.json", "polyfills": ["zone.js", "zone.js/testing"] } } } } } }

Just JeB

justjeb.com › post › angular-cli-ng-test-with-jest

Angular CLI: “ng test” with Jest in 3 minutes

June 27, 2022 - Due to this fact it’s possible that you favorite IDE will get confused with the typings and will propose you Jasmine types in unit tests. tsconfig.json is the config file that your IDE uses so you have to instruct it explicitly to use Jest typings. Bear in mind that the other side of the coin is that your IDE will propose you Jest types in your e2e tests. In angular.json change @angular-devkit/build-angular:karma to @angular-builders/jest:run:

DEV Community

dev.to › alfredoperez › angular-10-setting-up-jest-2m0l

Angular 11 - Setting up Jest - DEV Community

December 24, 2020 - "test": { "builder": "@angular-devkit/build-angular:karma", "options": { "main": "src/test.ts", "polyfills": "src/polyfills.ts", "tsConfig": "tsconfig.spec.json", "karmaConfig": "karma.conf.js", "assets": [ "src/favicon.ico", "src/assets" ], "styles": [ "src/styles.scss" ], "scripts": [] } }, ... { "extends": "./tsconfig.json", "compilerOptions": { "outDir": "./out-tsc/spec", "types": [ "jest", "node" ] }, "files": [ "src/polyfills.ts" ], "include": [ "src/**/*.spec.ts", "src/**/*.d.ts" ] }

Medium

medium.com › angular-in-depth › angular-cli-ng-test-with-jest-in-3-minutes-v2-1060ddd7908d

Angular CLI: “ng test” with Jest in 3 minutes (v2) | by Jenia Barabanov | Angular In Depth | Medium

June 27, 2022 - Due to this fact it’s possible that you favorite IDE will get confused with the typings and will propose you Jasmine types in unit tests. tsconfig.json is the config file that your IDE uses so you have to instruct it explicitly to use Jest typings. Bear in mind that the other side of the coin is that your IDE will propose you Jest types in your e2e tests. 4. In angular.json change @angular-devkit/build-angular:karma to @angular-builders/jest:run :

GitHub

github.com › angular › angular-cli › issues › 26132

Build unit tests specifically · Issue #26132 · angular/angular-cli

October 25, 2023 - "build-tests": { "builder": "@angular-devkit/build-angular:build-tests", "options": { "buildTarget": "my-app:build", "include": ["**/*.ts"], // Build options specific to tests... } } "test": { "builder": "@angular-devkit/build-angular:jest", "options": { "buildTestsTarget": "my-app:build-tests", // Jest options...

Published Oct 25, 2023

GitHub

github.com › just-jeb › angular-builders

GitHub - just-jeb/angular-builders: Angular build facade extensions (Jest and custom webpack configuration) · GitHub

Angular build facade extensions (Jest and custom webpack configuration) - just-jeb/angular-builders

Starred by 1.2K users

Forked by 210 users

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Tim Deschryver

timdeschryver.dev › blog › integrate-jest-into-an-angular-application-and-library

Integrate Jest into an Angular application and library

@angular-devkit/build-angular 0.6.8 · @angular-devkit/build-optimizer 0.6.8 · @angular-devkit/core 0.6.8 · @angular-devkit/schematics 0.6.8 · @angular/cli 6.0.8 · @ngtools/webpack 6.0.8 · @schematics/angular 0.6.8 · @schematics/update 0.6.8 · rxjs 6.2.0 ·

Stack Overflow

stackoverflow.com › questions › 77677713 › how-to-migrate-from-karma-to-jest-in-angular-17

unit testing - How to migrate from karma to jest in Angular 17 - Stack Overflow

npm install jest --save-dev npm install jest-environment-jsdom --save-dev npm install @types/jest --save-dev · In angular.json changed: "test": { "builder": "@angular-devkit/build-angular:karma", .... to: "test": { "builder": "@angular-devkit/build-angular:jest", ...

Atomic Spin

spin.atomicobject.com › 2022 › 08 › 02 › jest-angular-project

Use Jest to Replace Default Test Runners in an Angular Project

January 11, 2023 - npm i @angular-builders/jest @types/jest jest --save-dev · Next, we can update our angular.json file so that we can continue to use the ng test command to run our tests. Replace the following line "builder": "@angular-devkit/build-angular:karma" in the test node with "builder": "@angular-builders/jest:run".

DEV Community

dev.to › this-is-angular › angular-testing-in-2023-past-present-and-future-j5m

Angular Testing in 2023 - Past, Present, and Future - DEV Community

July 3, 2023 - Open your angular.json and replace the builder in test, which should have the value @angular-devkit/build-angular:karma to @angular-devkit/build-angular:jest.