Jasmine unit test for $ routeChangeStart in AngularJS

Question

Hi, I am building an application using AngularJS, and now I am on the module testing my application. I know how to write unit test cases for services, controllers, etc. But I do not know, write this for $routeChangeStart.

I have the following code in my app.js

app.run(function ($rootScope, $location, AuthenticationService) {
    $rootScope.$on('$routeChangeStart', function () {
        if (AuthenticationService.isLoggedIn()) {
            $rootScope.Authenticated = 'true';
            $rootScope.Identity = localStorage.getItem('identification_id');
        } else {
            $rootScope.Authenticated = 'false';
            $rootScope.Identity = localStorage.removeItem('identification_id');
        }
    });
});

I wrote this code to find out if the user is logged in or not for each routing in my application. For this purpose I wrote a service AuthenticationService, for example:

app.factory('AuthenticationService', function (SessionService) {
    return {
        isLoggedIn: function () {
            return SessionService.get('session_id');
        }
    };
});

And my session service is like:

app.factory('SessionService', function () {
    return {
        get: function (key) {
            return localStorage.getItem(key);
        }
    };
});

I use Jasmineto write test cases and use Istanbulto cover code. When I run my test using Grunt, I get something similar in app.js;

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Answer 1

run , , . , , . - :

it("should test the $routeChangeStart listener", inject(function($rootScope) {
   $rootScope.$broadcast("$routeChangeStart");
   //expects for the listener
}));

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Answer 2

$rootScope.$on('$routeChangeStart',... . , , . unit test , ?

https://github.com/angular/angular.js/blob/master/test/ngRoute/routeSpec.js

( angular head 1.2.x - ) , ( ):

'use strict';

describe('$route', function() {
  var $httpBackend;

  beforeEach(module('ngRoute'));

  beforeEach(module(function() {
    return function(_$httpBackend_) {
      $httpBackend = _$httpBackend_;
      $httpBackend.when('GET', 'Chapter.html').respond('chapter');
      $httpBackend.when('GET', 'test.html').respond('test');
      $httpBackend.when('GET', 'foo.html').respond('foo');
      $httpBackend.when('GET', 'baz.html').respond('baz');
      $httpBackend.when('GET', 'bar.html').respond('bar');
      $httpBackend.when('GET', 'http://example.com/trusted-template.html').respond('cross domain trusted template');
      $httpBackend.when('GET', '404.html').respond('not found');
    };
  }));

  it('should route and fire change event', function() {
    var log = '',
        lastRoute,
        nextRoute;

    module(function($routeProvider) {
      $routeProvider.when('/Book/:book/Chapter/:chapter',
          {controller: angular.noop, templateUrl: 'Chapter.html'});
      $routeProvider.when('/Blank', {});
    });
    inject(function($route, $location, $rootScope) {
      $rootScope.$on('$routeChangeStart', function(event, next, current) {
        log += 'before();';
        expect(current).toBe($route.current);
        lastRoute = current;
        nextRoute = next;
      });
      $rootScope.$on('$routeChangeSuccess', function(event, current, last) {
        log += 'after();';
        expect(current).toBe($route.current);
        expect(lastRoute).toBe(last);
        expect(nextRoute).toBe(current);
      });

      $location.path('/Book/Moby/Chapter/Intro').search('p=123');
      $rootScope.$digest();
      $httpBackend.flush();
      expect(log).toEqual('before();after();');
      expect($route.current.params).toEqual({book:'Moby', chapter:'Intro', p:'123'});

      log = '';
      $location.path('/Blank').search('ignore');
      $rootScope.$digest();
      expect(log).toEqual('before();after();');
      expect($route.current.params).toEqual({ignore:true});

      log = '';
      $location.path('/NONE');
      $rootScope.$digest();
      expect(log).toEqual('before();after();');
      expect($route.current).toEqual(null);
    });
  });