This one keeps you current with Angular 21's testing changes, which is actually important since they swapped Karma for Vitest as the default runner. You get practical patterns for TestBed setup, component fixtures, async testing with fakeAsync, and proper mocking with spies. The examples cover the basics well: AAA pattern, DOM querying with by.css, HTTP testing with the new provideHttpClient, and form validation. What's useful here is the emphasis on testing behavior over implementation details, plus the coverage of template testing which is new to Angular 21. If you're writing any kind of Angular test, whether unit, component, or service level, this gives you the modern approach without legacy Jasmine cruft.
npx skills add https://github.com/oguzhan18/angular-ecosystem-skills --skill angular-testing