angular air with rainer hahnekamp testing signals

Download 1M+ code from https://codegive.com/6867d6a
tutorial: testing signals in angular with rainer hahnekamp

in this tutorial, we will explore how to test signals in angular applications using the concepts presented by rainer hahnekamp. we'll cover the basics of signals, how to implement them, and how to effectively test them.

what are signals?

signals are a new reactive primitive in angular that allow components and services to communicate and react to changes in state. this is particularly useful for managing shared state across components without the need for complex state management libraries.

setting up your angular project

1. **create a new angular project** (if you haven’t already):
```bash
ng new angular-signals-demo
cd angular-signals-demo
```

2. **install the necessary dependencies**:
you may need to install a library that supports signals. for this tutorial, we assume you have a compatible setup.

implementing signals

let’s create a simple counter service that uses signals to manage its state.

step 1: create a signal service

create a new service called `counter.service.ts`.

```typescript
import { injectable, signal } from '@angular/core';

@injectable({
providedin: 'root',
})
export class counterservice {
private count = signal(0);

increment() {
this.count.update((value) = value + 1);
}

decrement() {
this.count.update((value) = value - 1);
}

getcount() {
return this.count;
}
}
```

step 2: create a component to use the service

now, let’s create a simple component that uses the `counterservice`.

```typescript
import { component } from '@angular/core';
import { counterservice } from './counter.service';

@component({
selector: 'app-counter',
template: `
h1counter: {{ count() }}/h1
button (click)="increment()"increment/button
button (click)="decrement()"decrement/button
`,
})
export class countercomponent {
count = this.counterservice.getcount();

constructor(private counterservice: counterservice) {}

incr ...

#AngularAir #RainerHahnekamp #gk
Angular air
Rainer Hahnekamp
testing signals
Angular testing
reactive programming
observables
performance optimization
component testing
unit testing
asynchronous testing
Angular architecture
state management
test automation
debugging techniques
frontend development

Видео angular air with rainer hahnekamp testing signals канала CodeMade