AngularJS et UI-Router: 'Erreur: transition dépassée' lors des tests unitaires angularjs

Je suis d'essayer de créer une autorisation pour un projet de mine. J'obtiens le message d'erreur "la transition remplacée" au cours de mes tests unitaires, et je ne peux pas savoir où ce serait effectivement.

De test de l'unité:

import angular from 'angular';
import 'angular-mocks';
import worldManagerApp from '../../src/world-manager-app';
import security from '../../src/security/security';

const {inject, module} = angular.mock;

describe('LoginService', ()=> {
    let $httpBackend;
    let $rootScope;
    let successHandler;
    let errorHandler;
    let LoginService;

    const USER = {username: "TEST", password: "PASSWORD"};

    beforeEach(function() {
        module(worldManagerApp);
        module(security);

    });

    beforeEach(inject((_$httpBackend_, _LoginService_, _$rootScope_) => {
        $httpBackend = _$httpBackend_;
        $rootScope = _$rootScope_;
        LoginService = _LoginService_;

        successHandler = jasmine.createSpy('successHandler');
        errorHandler = jasmine.createSpy('errorHandler');
    }));

    it('should exist', () => {
        expect(LoginService).toBeDefined();
    });

    describe('.login()', () => {

        describe('when given a proper username and password', () => {
           it('should return the username and success', () => {
               $httpBackend.expectPOST('/login').respond(200, {user: USER});
               LoginService.login("TEST", "PASSWORD");
               $rootScope.$digest();
               $httpBackend.flush();

               expect($rootScope.currentUser).toEqual("TEST");
           });
        });
    });

});

Service:

export default function LoginService($http){
    'ngInject';

    let service = {};
    service.login = login;

    function login(username, password){
        $http({
            url:'/login',
            method: 'POST',
            data: {
                username: username,
                password: password,
            },
        }).then (function(response) {
            response.username;
        }).catch(function(response){
        });
    }

    return service;
}

Erreur:

PhantomJS 1.9.8 (Windows 8 0.0.0) LoginService .login() when given a proper username and password should return the username and success FAILED
        Error: transition superseded
            at C:/Users/Manifest/AppData/Local/Temp/353229d8bf0abe298e7003bab30c0528.browserify:9387 <- node_modules/angular-mocks/angular-mocks.js:261:0
            at processChecks (C:/Users/Manifest/AppData/Local/Temp/353229d8bf0abe298e7003bab30c0528.browserify:33750 <- node_modules/angular/angular.js:16674:0)
            at C:/Users/Manifest/AppData/Local/Temp/353229d8bf0abe298e7003bab30c0528.browserify:35048 <- node_modules/angular/angular.js:17972:0
            at C:/Users/Manifest/AppData/Local/Temp/353229d8bf0abe298e7003bab30c0528.browserify:34862 <- node_modules/angular/angular.js:17786:0
            at C:/Users/Manifest/AppData/Local/Temp/353229d8bf0abe298e7003bab30c0528.browserify:521 <- frontend\test\security\loginService.spec.js:42:15

Je suppose que c'est une interface de Routeur de problème, mais je ne peux pas comprendre comment il devrait fonctionner si je le fais mal.

source d'informationauteur Cooper