karma VS MobX

Run ng test to execute the unit tests via Karma.

This is an example for those using Karma:

Karma

While the default Angular starter includes unit tests, it makes use of the older and clunky Karma/Jasmine combo for unit testing.

If Protractor is replacing Angular Scenario Runner for E2E testing, does that mean I will still be able to use it with Karma as my E2E testing framework ?

They are tools for automated testing of websites/webapps: https://karma-runner.github.io https://www.cypress.io

Run ng test to execute the unit tests via Karma.

iii. Integration Testing -Karma

Karma

Similarly to Promises/A+, this effort focuses on aligning the JavaScript ecosystem. If this alignment is successful, then a standard could emerge, based on that experience. Several framework authors are collaborating here on a common model which could back their reactivity core. The current draft is based on design input from the authors/maintainers of Angular, Bubble, Ember, FAST, MobX, Preact, Qwik, RxJS, Solid, Starbeam, Svelte, Vue, Wiz, and more…

MobX

Mutable-based: leverages proxy to create mutable data sources which can be directly written to or reactively read from. Candidates in this group are MobX and Valtio.

Looks good! FWIW I always felt the observable pattern much more intuitive than the redux/reducer style. Something like https://mobx.js.org/

Things get hairy in both, but redux pattern feels so ridiculously ceremonially to effectively manage a huge global state object with a false sense of "purity".

Observables otoh say "fuck it, I'm mutating everything, do what you want with it".

MobX Documentation

There's also others libraries like https://github.com/mobxjs/mobx which aren't specific to RN but can be used in any JS environment.

Valtio is like simplified MobX

Link: https://mobx.js.org

But I want to impress upon you that this is just only one of many patterns you can use this hook for. While this is subjective, I am personally not a huge fan of Redux and this type of pattern. It has its merits, but I think once you want to start layering in new patterns for actions, Mobx, Zustand, or XState are preferable in my personal opinion.