Testing a service in Angular using $q is a crucial step in ensuring the functionality and

Offering a straight forward service:

.factory('list', function($q, $timeout) {
    return {
        get: function() {
            var dfd = $q.defer();

            $timeout(function () {
                dfd.resolve(['label1', 'label2']);
            }, 10);

            return dfd.promise;
        }
    };
});

I'm eager to put it to the test. That's why I crafted:

describe('list', function() {

    var list, labels;

    beforeEach(module('app'));
    beforeEach(inject(function($q, _list_) {
       list = _list_;

       spyOn(list, 'get').and.callThrough();

       list.get().then(function(result) {
           labels = result;
       });
    }));

    describe('retrieving list of labels', function() {

        it('should provide a list of labels', function() {
            expect(labels).not.toBe(undefined);
            expect(Array.isArray(labels)).toBeTruthy();
        });

     });

});

However, the issue at hand is that the callback within the then function isn't being executed, despite the fact that the get method in the service returns a promise. Am I overlooking something here? I came across information about the callFake method in Jasmine, but frankly speaking, I fail to see its purpose. Can you elaborate on the advantages of using it? By the way, I am using Jasmine 2.0 along with the latest version of Angular and angular-mocks.

Answer №1

It was such an easy solution, but it slipped my mind at the time. Because I utilized $timeout, I should have remembered to invoke flush afterward.

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