Angular mocking XHRBackend: how to call mockRespond

I’m adding unit tests to my API and had a bit of bother mocking the API response. However after a lot of console.log and much head scratching I found some voodoo that works.


1 . Josh Morony’s blog post said the call is

connection.mockRespond ( new Response ( newResponseOptions(...

That didn’t work for me, I had to use

connection.mockRespond ( newResponseOptions ( body: myObjects

2. But that’s not all, my live response (from a MS WebApi) has a ._body property, my mocked response has a .body. So I had to do something like this

if(res['body']){ //works with mocks
}else if(res['_body']){//works in live system

I started with this complete example:

git clone

(The version numbers of the npm packages have to be compatible)

And worked through this blog post (and others!):

Test Driven Development in Ionic 2: Http and Mocks

This would have been a lot easier if I could figure out how to attach a debugger to Karma, no luck with that so far. Anyhow my complete dummy-service.spec.ts (including code for the service) is…

(just as soon as i figure out how to paste code into wordpress…)

import {Injectable} from '@angular/core';
import { Http, HttpModule, XHRBackend, ResponseOptions, Response } from '@angular/http';
import { TestBed, inject } from '@angular/core/testing';
import { MockBackend } from '@angular/http/testing';

export class DummyService {
  constructor(public http:Http){}
    console.log('DummyService Test1 F');
      console.log('DummyService Test1 G got ' + JSON.stringify(res));
      if(res['body'] && res['body']['access_token']){
        this.access_token = res['body']['access_token']; //works with mocks
        console.log('loginUser got token from body (we are using a mock)');
      }else if(res['_body'] && JSON.parse(res['_body']) 
&& JSON.parse(res['_body']).access_token){
        this.access_token = JSON.parse(res['_body']).access_token; //works with live system
        console.log('loginUser got token from _body (we are live)');
      console.log('access_token is ' + this.access_token);

describe ('DummyService http method',()=>{
          {provide: XHRBackend, useClass:MockBackend},

  it('should call get and get response',inject([DummyService, XHRBackend],(dummyService, mockBackend)=>{

    console.log('DummyService Test1 A');

    let r1 = "hello"; //works
    let r2 = "{access_token:'SOMETOKEN'}"; //works
    let r3 =  //doesn't work, service gets empty object {}
        new Response(
            new ResponseOptions(
                body: "here is the info"
    let r4 = JSON.stringify(r3);//doesn't work, service gets empty object {}
    let r5 = new ResponseOptions( //aha THIS is the bunny...
            body: {access_token:'SOMETOKEN'}

        console.log('DummyService Test1 D v4 r5');

    console.log('DummyService Test1 B');


    console.log('DummyService Test1 C');




Upload changes only to your published web site (patch your web site files)

When you publish a web site you get all the files in a .zip or in a folder.

That’s a lot of files to transfer, especially if you can’t easily publish a package or you have a slow connection to your web server.

But with each version of the web site you have only changed a few files.

So after the first publish, write a .cmd or .bat file using xcopy to put just the changed files into another folder. Something like…


xcopy MyProject MyProjectUpdate /D:2-19-2018 /S /I /Y


/D:m-d-y Copies files changed on or after the specified date.
If no date is given, copies only those files whose
source time is newer than the destination time.
(change this every few days, and also clear out the destination folder MyProjectUpdate )

/S Copies directories and subdirectories except empty ones.

/I If destination does not exist and copying more than one file,
assumes that destination must be a directory.

/Y Suppresses prompting to confirm you want to overwrite an
existing destination file.