ng test -> running jest

You have an existing project and integrated Jest all by yourself?
Awesome.

Your ng test command is broken and you can not use any builder (be it @nrwl/jest or @angular-builders/jest) without messing up your already existing setup. All you want is for ng test to execute jest with your existing configuration.

This documentation is for version 8 only.

Allows running ng test with your currently working Jest configuration.

Prerequisites

• Angular CLI 8
• Jest 24

Folder structure

This builder expects the following structure:

...
projects/
    project1/
        jest.config.js
    project2/
        jest.config.js
...

Installation

Install the builder (and jest if you still haven't): npm i -D jest @types/jest @twy-gmbh/angular-vanity-builder-jest

Running with Angular CLI

• In your angular.json:

  "projects": {
      ...
      "[your-project]": {
        ...
        "architect": {
            ...
            "test": {
                "builder": "@twy-gmbh/angular-vanity-builder-jest:run"
  

• Run the tests: ng test or ng test [your-project]

Zero additional configuration is needed since all of your configuration is already where it actually belongs, the jest.config.js files.

With this structure, you can cd into a project folder, and use the Jest cli to run the tests via jest. You can now also use ng test in the root folder, this will run the tests for all projects.

ng test project1 on the other hand let's you execute the specific test suite of said project.