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spec file

'use strict';

describe('component test : home', function () 

 // add module reference you want to test
 beforeEach(module('homeView'));

 // add templates [from karma]
 beforeEach(module('templates'));

 var element;
 var scope;
 var $httpBackend;

 beforeEach(inject(function ($rootScope, $compile, _$httpBackend_) 
 $httpBackend = _$httpBackend_;
 scope = $rootScope.$new();
 element = angular.element('<home-view></home-view>');
 scope.$apply(function () 
 $compile(element)(scope);
 );
 ));


 it('extra column http get', function () 
 var mockResponse = 
 data: 
 success: true,
 message: ':D :D'
 
 ;

 $httpBackend.expectGET('http://localhost:51275/api/ExtraColumn')
 .respond(mockResponse);

 expect(data).toEqual(mockResponse);

 $httpBackend.flush();
 );


 //it('header text', function () 
 // var title = element.find('h1');
 // console.log(title.text());
 // expect(title.text()).toContain('Interviewees');
 //);



);

error

 Error: Unexpected request: GET http://localhost:51275/api/ExtraColumn
 No more request expected
 at createFatalError (Scripts/angular-mocks.js:1569:19)
 at $httpBackend (Scripts/angular-mocks.js:1616:11)
 at sendReq (Scripts/angular.js:13257:9)
 at serverRequest (Scripts/angular.js:12998:16)
 at processQueue (Scripts/angular.js:17914:37)
 at Scripts/angular.js:17962:27
 at Scope.$digest (Scripts/angular.js:19075:15)
 at ChildScope.$apply (Scripts/angular.js:19463:24)
 at UserContext.<anonymous> (home-view/home-view.component.spec.js:19:15)
 at Object.invoke (Scripts/angular.js:5122:19)
 at <Jasmine>
 at window.inject.angular.mock.inject (Scripts/angular-mocks.js:3422:25)
 at Suite.<anonymous> (home-view/home-view.component.spec.js:15:16)
 at <Jasmine>
 at home-view/home-view.component.spec.js:3:1
 ReferenceError: data is not defined
 at <Jasmine>
 at UserContext.<anonymous> (home-view/home-view.component.spec.js:36:16)
 at <Jasmine>

I am trying to write tests for my angularjs application. The test needs to mock a http request an I wrote this one above and got these error. unexpected get and $digest already in progress errors when I do not even have a $digest in my code. How do I fix this please tell me.

At any point in time there can be only one $digest or $apply operation in progress. This is to prevent very hard to detect bugs from entering your application. The stack trace of this error allows you to trace the origin of the currently executing $apply or $digest call, which caused the error.

please refer this link