What Are Isolated Unit Tests?
The Isolated unit tests check-up an instance of a class itself without using any Angular dependence or any injected values.
Mostly application tester creates a test instance of the class with new keyword and supplying test doubles for the constructor parameters and then investigation the test instance.
The isolated unit tests don't realize how components interact with Angular and also don't realize how a component class interacts with its own template or components.
For testing Angular Pipes and Services - we should write isolated unit tests!
The isolated unit tests don't realize how components interact with Angular and also don't realize how a component class interacts with its own template or components.
Stayed Informed - Angular 2 Docs with Examples
Stayed Informed - Angular 4 Docs with Examples
Stayed Informed - Angular 2 Docs with Examples
Stayed Informed - Angular 4 Docs with Examples
The most familiar Unit Test for the Tester and Developers as following -
1. Create an Instances directly with new keyword
2. Angular Agnostic Testing Techniques
3. Exhibit Standard
4. Substitute Test
The Most of the Tester and Developers are tried to avoid Unit Testing following methodology-
1. Import from the Angular Test Libraries - @angular/core/testing
2. Configure Angular module
3. Prepare Dependency Injection Providers
4. Call Inject or (async/fakeAsync)
import { Pipe, PipeTransform } from '@angular/core'; @Pipe({ name: 'barcode', pure: false }) export class BarCodePipe implements PipeTransform { transform(value: string, args: any[]): string { if (!value) { return ''; } return "****-****_" + (value.length > 8 ? (value.length - 8): '') } }
Unit Testing to the Pipe - BarCodePipe
describe('BarCodePipe', () => { let pipe = new BarCodePipe(); //Todo tests ... });
References
-
|
Anil Singh is an author, tech blogger, and software programmer. Book writing, tech blogging is something do extra and Anil love doing it. For more detail, kindly refer to this link..
|