zimejin

import { Observable, Observer } from 'rxjs';

export class UserAsyncService {
  user = { name: 'Mannie' };
  getUserDetails() {
    // Create an observables.
    const userObservables = Observable.create(
      (observer: Observer<{ name: string }>) => {
        setTimeout(() => {
          observer.next(this.user);

zimejin

import { TestBed, tick, fakeAsync } from '@angular/core/testing';
import { UserAsyncComponent } from './user-async.component';
import { UserAsyncService } from './user-async.service';
import { Observable, Observer } from 'rxjs';

describe('User Async Component:', () => {
  beforeEach(async () => {
    TestBed.configureTestingModule({
      declarations: [UserAsyncComponent]
    });