Looking for documentation setup jest for unit test of admin plugin - unit-testing

Question

my project was created with the swdc create-project ...
Is there a documentation, a tutorial or description for the right setup/configuration unit testing with JEST for custom plugin in administration?
This tutorial describes only how to write a test
But i think there must be a official setup documentation because of versions etc.

Answer 1

EDIT: a tutorial with code is now avialable
Using the suggested solution and execute the test, throws an configuration error:
● Test suite failed to run
Configuration error:
Could not locate module src/core/factory/module.factory mapped as:
undefined/src$1.
Please check your configuration for these entries:
{
"moduleNameMapper": {
"/^src(.*)$/": "undefined/src$1"
},
"resolver": undefined
}
...
Cause of error:
process.env.ADMIN_PATH not setted but required in %Project%/custom/plugins/%MyPlugin%/src/Resources/app/administration/node_modules/#shopware-ag/jest-preset-sw6-admin/jest-preset.js
My solution:
set process.env.ADMIN_PATH in %Project%/custom/plugins/%MyPlugin%/src/Resources/app/administration/jest.config.js
// jest.config.js
...
const { join, resolve } = require('path');
process.env.ADMIN_PATH = resolve('../../../../../../../src/Administration/Resources/app/administration');
...

Answer 2

I think it is easiest to just copy and adapt from a plugin that already has jest tests set up. Look at the administration directory for SwagPayPal for example. Copy the dependency and script sections from their package.json. Also copy the entire jest.config.js. Then within the administration directory of your plugin you should be able to npm install followed by npm run unit or npm run unit-watch and it should find *.spec.js files within the test sub-directory.