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How to Setup Test in Angular Project?

Setup a Test Project -
Angular CLI install everything you need to test an Angular application. This CLI command takes care of Jasmine and karma configuration for you.

Run this CLI command-
ng test

The test file extension must be “.spec.ts” so that tooling can identify the test file.
You can also unit test your app using other testing libraries and test runners.

Types of Test –
The all great developer knows his/her testing tools use. Understanding your tools for testing is essential before diving into writing tests.

The Testing depends on your project requirements and the project cost. The types of Testing looks like -
1.      Unit Test
2.      Integration Test
3.      End to End (e2e) Test
The example looks like – app.component.spec.ts

import { TestBed, async } from '@angular/core/testing';
import { AppComponent } from './app.component';
describe('AppComponent', () => {
  beforeEach(async(() => {
    TestBed.configureTestingModule({
      declarations: [
        AppComponent
      ],
    }).compileComponents();
  }));

  it('should create the app', async(() => {
    const fixture = TestBed.createComponent(AppComponent);
    const app = fixture.debugElement.componentInstance;
    expect(app).toBeTruthy();
  }));

  it(`should have as title 'app'`, async(() => {
    const fixture = TestBed.createComponent(AppComponent);
    const app = fixture.debugElement.componentInstance;
    expect(app.title).toEqual('app');
  }));
 
  it('should render title in a h1 tag', async(() => {
    const fixture = TestBed.createComponent(AppComponent);
    fixture.detectChanges();
    const compiled = fixture.debugElement.nativeElement;
    expect(compiled.querySelector('h1').textContent).toContain('Welcome to app!');
  }));
})
ANIL SINGH

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..
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