'undefined' is not a function - Jasmine unit test for AngularJS

Question

I can't figure out why I keep getting this exception. The service is in one module, and the helper (unit under test) is in another. I'm trying to mock out the service (which is a dependency for the helper) and create the helper injecting that mocked service.

Thanks for any ideas!

TypeError: 'undefined' is not a function (evaluating 'jasmine.spyOn(myService, 'someData')')

Here's the test:

describe('myHelper test', function () {
var myHelper, myService;
var expectedData = 'test';

beforeEach(module('serviceModule'));
beforeEach(module('helperModule'));

    it('works', function() {

        module(function($provide) {
            $provide.service('myService', function() {
                someData = jasmine.spyOn(myService, 'someData').and.callFake(function(){
                   return 100; });
            });
        });

        var mockMyService;

        inject(function(myService){
            mockMyService = myService;
        });

        angular.module('helperModule').config(['myHelperProvider', function (myHelperProvider) {
            return myHelper(mockMyService, _);
        }]);

        expect(myHelper.someData()).toEqual(expectedData);
    });

});

Having trouble following your unit test code out of context - can you post the service/helper module code as well? In general, my suggestion would be to make a formal mock of the service rather than doing it in the unit test itself since that makes the mock portable. — user1821052
– user1821052, Commented Jun 25, 2015 at 21:43

Chandermani · Accepted Answer · 2015-06-25 22:33:00Z

2

If you are using spyOn then you should inject the real service inside the test and then do a spyOn.

 inject(function(myService){
            jasmine.spyOn(myService, 'someData').and.callFake(function(){
                   return 100; });
            });
            mockMyService = myService;
        });

Currently you are trying to create a mock service myService by injecting original service myService (which also has bug, because you have not done injection of original service)!

answered Jun 25, 2015 at 22:33

Chandermani

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