Creating an Observable for Mock Data in Angular 2

Creating an Observable for Mock Data in Angular 2

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I am trying to return an Observable from a service with mock data.

I am returning this from my service :

return Observable.of(new Object()).map(MOCKACCOUNT =>JSON.stringify(MOCKACCOUNT));

I get an error

Observable_1.Observable.of is not a function.

Am I missing some include? I am importing

import {Observable} from "rxjs/Observable";

Note: I was returning a mock promise prior but based on my understanding I would not be able to interpolate the value. For example {{returnFromServiceStoredInExportedClass.name}}


Looks like

import {Observable} from "rxjs/Observable";

should be

import {Observable} from "rxjs/Rx";

See also Angular2 RxJS getting 'Observable_1.Observable.fromEvent is not a function' error

Angular 2 - Angular 2, angular2 documentation: Angular 2 - Mock Observable ( service + component ) I created component with result parameter and postExample function that call to postService. when the post resquest toEqual('Success'); expect(data). angular2 documentation: Angular 2 - Mock Observable ( service + component )


Use

return Observable.of(new Object()).mapTo(MOCKDATA);`

The import statement is fine.

import {Observable} from "rxjs/Observable";

Also need to import the ts file for MOCKDATA

import {MOCKDATA} from "../path_to_mockdata";

How to Mock an API in Angular v6, Now we can move on to creating a service for our observable which will serve as our mocked API. ng g service services/fighters/fighters. Here we'� There are many ways to create observable in Angular. You can make use of Observable Constructor as shown in the observable tutorial. There are a number of functions that are available which you can use to create new observables. These operators help us to create observable from an array, string, promise, any iterable, etc.


Should be

import { Observable } from 'rxjs/Observable';
import 'rxjs/add/observable/of';

because

import {Observable} from "rxjs/Rx";

will import all other operators that you don't need

RxJS of() Example: Mocking Data with an Angular 7/8 Service and , RxJS of() Example: Mocking Data with an Angular 7/8 Service and that allows you to create an RxJS Observable from a sequence of values. import { of } from 'rxjs'; of(1, 2, 3, 4) .subscribe( next => console.log('next:', next),� Creating observables Creating observables is easy, just call the new Observable() and pass along one argument which represents the observer. Therefore i usually call it “observer” as well.


Simple Observable Unit Testing in Angular2, When you're writing unit tests for your angular2 components, and you rather then writing fake responses with fake data for every component. You can quickly create a service stub for your data service, and then simply� Enter FlatMap: var myThing = http.get('path').flatMap(result1 => http.get('other/' + result1).flatMap(response2 => http.get('another/' + response2))); Sweet, the var is an observable that gets the data from the final http call.


Creating Angular 2 Mock Observable from test data (JavaScript array), Angular 2 Observables are a powerful way of handling asynchronous streaming data. However they can be a little tricky to mock out, if for� For testing purposes, I'm creating Observable objects that replace the observable that would be returned by an actual http call with Http. My observable is created with the following code: fakeObservable = Observable.create(obs => { obs.next([1, 2, 3]); obs.complete(); }); The thing is, this observable emits immediatly.


Testing Observables in Angular. In this article, I'd like to talk about , We have data service that uses the Angular HTTP library to return cold we can create a stub service that returns an of() observable. I have managed to mock the call for data in my component but I am struggling to find a way to mock the single observable value. All the questions on SO that I can find are all about mocking a function call from the service in the component but none that I can find are about mocking a single observable. Here is my function call in the service.