How do I test Signals (signal, computed, effect)?

Signals as lightweight "reactive primitive" will shape the future of Angular applications.

Especially with Signal Inputs, Signals find more and more usage in everyday tasks. It is time to consider integrating Signals into our codebases.

And that requires us to be able to write tests as well.

How do I test and mock Standalone Components?

If you prefer the kind of tests that minimize mocking as much as possible, you will be pretty happy with Standalone Components. Gone are the struggles of meticulously picking dependencies from NgModules for your Component under test.

Standalone Components come self-contained. Add them to your TestingModule's `imports` property, and all their "visual elements" – Components, Directives, Pipes, and dependencies – become part of the test. As a nice side-effect, you reach a much higher code coverage.

NgRx Best Practices Series: 4. Facade Pattern

This article covers the Facade pattern in NgRx. The reader must have a basic understanding of NgRx or a similar state management library.

The Facade pattern mainly decouples NgRx from the rest of our application. We can also see it as an API. The Facade masks the dispatching of actions as method calls and the selectors as properties of type Observable.

Next to the decoupling, the facade pattern offers even further advantages.