Example of testing angular (angularjs) factory using http.

songs.js

angular.module('pearlJam')
  .factory('Songs', function($http, $timeout, Config){
      var response = {list: []};
      var onSuccess = function(result){
        response.list = result.data.data;
        $timeout(poller, Config.pollingTimeout);
      };
      
      var poller = function(){
        $http.get('api/songs.json', Config.httpOptions).then(onSuccess);
      };
      
      poller();
      return {all: response};
    });
    
  

songsSpec.js

describe('Songs', function(){
    var httpStub, localService;
    beforeEach(module('Sauron'));
    
    beforeEach(inject(function(_$httpBackend_, Streams){
      httpStub = _$httpBackend_;
      localService = Streams;
    }));
    
    it('lists all songs', function(){
      var httpResponse = { data: [1]};
      httpStub.whenGET('api/songs.json').respond(httpResponse);
      
      var serviceResponse = localService.all;
      httpStub.flush();
      
      expect(serviceResponse).toBe([1]);
    });
  });