Angular Testing: Mocking $ httpBackend - Handling Success and Errors

Update: I was able to narrow down the problem and fix the Unexpected Request error by updating the httpBackend.when request that contained some invalid ascii characters.

I added Plunker with its current codeblock .

But I still find it difficult to effectively test triggering successes and errors. I also need to add waits to check for broadcast messages.

To test the above scenario, I developed a hack that I included in Plunker, but I believe there must be a much better way to test these scenarios.

Any conclusions on how I can overcome this issue and check the response status would be greatly appreciated.

Problem

I have set the expected value / response for $ httpBackend for my test, but when I run $ httpBackend.flush () it doesn't show below mention error.

Error message specified

Error: Unexpected request: GET https://192.168.1.10:3334/res?t1=CHECK&t2='?'&req={"_msgType":"Login_msg","UserName":"e@e.com","Password":"123"}

      

        
        
        
      

    

I found helpful links that discussed about this problem domain, and they helped me narrow down the problem a bit. But I still can't figure out why this unit test is failing.

Useful questions

• Angular mock $ httpBackend gives no pending cleanup request
• Unit testing AngularJS with $ httpBackend gives "Error: Unexpected request"
• Testing Angular $ Resource with External Service
• Why am I getting the error ... unexpected request
• Mocking $ httpBackend

Useful external resources

• AngularJS tests with HTTP mock
• Unit Testing $ http service in Angular.js
• Angularjs Tutorial: Testing with ngMock $ httpBackend and Karma.
• Angular JS - Device Testing - Services
• AngularJS tests with HTTP mock

I also tried moving the flush () call around and also tried calling $ apply or $ digest when making a request to $ http in the test suggested here.

AngularJS Testing Service

    app.service('restService',['$log','$http','$rootScope',function($log,$http,$rootScope)
{
    this.location = null;
    this.port = null;

    this.sendRequest = function(host,port,param1,param2,requestMsg)
    {
        this.location = host;
        this.port = port;
        $http.get('https://'+host+":"+port+"/res?t1="+param1+"&t2="+param2+"&req="+JSON.stringify(requestMsg)).
        success(function(data) { 
           //Need to add expectations to check success operations
           $log.log('response received',data);
           var msgData  = data;
           $rootScope.successCalled = true;
           $rootScope.response = data;
            if(msgData.hasOwnProperty('_msgType'))
            {
                $log.log('broadcast for channel',msgData._msgType);
                $rootScope.$broadcast(msgData._msgType,msgData);
            }
        }).
        error(function(){
            //Need to add expectations to check error method operations
            var httpErrMsg = {_msgType:'HTTPErr', host:host, port:port, t1:param1, t2:param2, requestMsg:requestMsg};
            $rootScope.errorCalled = true;
            $rootScope.response = data;
            $rootScope.$broadcast(httpErrMsg._msgType,httpErrMsg);
        });
    }

    this.getIP = function()
    {
        return this.location;
    }
    this.getPort = function()
    {
        return this.port;
    }
}])

      

        
        
        
      

    

Characteristics used to test the service

     "use strict";                                   

    describe("Rest service test", function() 
    {
        var $scope, $location, httpBackend, $log, restService , loginMsg ;

        beforeEach(module('app'));

    beforeEach(inject(function (_restService_) 
    {
    restService = _restService_;
    }));

    beforeEach(inject(function($rootScope, _$location_, $httpBackend, _$log_)
    {
        $scope    =  $rootScope.$new();
        $location = _$location_;
        httpBackend = $httpBackend;
        $log = _$log_;

        loginMsg={ _msgType:"Login_msg", UserName:"e@e.com", Password:"123"};
    }));

    afterEach(function() 
    {
        httpBackend.verifyNoOutstandingExpectation();
        httpBackend.verifyNoOutstandingRequest();
    });

    describe("Service : Rest Service", function()
    {
      it('Should start with location and port undefined', function() {
      expect(restService.location).toEqual(null);
      expect(restService.port).toEqual(null);
      });

      it("check if method exists", function() {
      expect(restService.sendRequest).toBeDefined();
      });

      it("GetIP method Exists ", function()
      {
       expect(restService.getIP).toBeDefined();
      });

      it("GetPort method Exists ", function()
      {
      expect(restService.getPort).toBeDefined();
      });

      it("GetIP  Value ", function()
      {
      restService.location = '192.168.1.10';
      expect(restService.location).toEqual('192.168.1.10');
      });

      it("GetPort Value ", function()
      {
      restService.port = '3334';
      expect(restService.port).toEqual('3334');
      });

      it("Execute sendRequest()", function() {
      httpBackend.when('GET', 'https://192.168.1.10:3334/res?t1=CHECK&t2=\'?\'&req={"_msgType":"Login_msg","UserName":"e@e.com","Password":"123"}')
      .respond ({SessionId:"2103337586",Status:"user e@e.com not found ",EMail:"e@e.com",rejectCode:1,rejectReason:"Invalid username or password",_msgType:"LoginReply_msg"});
      restService.sendRequest("192.168.1.10","3334","CHECK","'?'",loginMsg);
      httpBackend.flush();

      expect(restService.location).toEqual('192.168.1.10');
      expect(restService.port).toEqual('3334');
      expect($scope.successCalled).toBe(true);
      expect($scope.response).not.toBe(null);
      expect($scope.response._msgType).toEqual('LoginReply_msg');
      });
   });
});