Jasmine unit test angular service - angularjs

Question

i begin to use Jasmine in unit testing angularjs and see a lot example but not work i have usersservice and i need to make unit test for it
Please i need work demo
(function () {
'use strict';
angular
.module('app')
.factory('UserService', UserService);
UserService.$inject = ['$http'];
function UserService($http) {
var service = {};
service.GetAll = GetAll;
return service;
function GetAll(page) {
return $http.get('https://api.github.com/users').then(handleSuccess, handleError('Error getting all users'));
}
// private functions
function handleSuccess(res) {
return res.data;
}
function handleError(error) {
return function () {
return { success: false, message: error };
};
}
}})();

Answer 1

Below is a test demo for your service:
describe("UserService", function() {
var service;
var $rootScope;
var $httpBackend;
var dataMock = ["John", "Albert", "Mary"];
beforeEach(module('app'));
beforeEach(inject(function($injector) {
$rootScope = $injector.get('$rootScope');
$httpBackend = $injector.get('$httpBackend');
service = $injector.get('UserService');
}));
afterEach(function() {
$httpBackend.verifyNoOutstandingExpectation();
$httpBackend.verifyNoOutstandingRequest();
});
it('should fetch 3 users', function() {
$httpBackend.when('GET', 'https://api.github.com/users').respond(dataMock);
service.GetAll().then(function(users) {
expect(users.length).toBe(3);
expect(users).toEqual(dataMock);
});
$httpBackend.flush();
});
it('should return error', function() {
$httpBackend.when('GET', 'https://api.github.com/users').respond(403);
service.GetAll().then(function(error) {
expect(error.success).toBe(false);
expect(error.message).toEqual('Error getting all users');
});
$httpBackend.flush();
});
});
You can see it working on Plunker: https://plnkr.co/edit/agV0rO?p=preview