Angular Jasmine test response interceptor

Question

I\'m trying to test my response interceptor but I have a hard time figuring out how to mock the $window object. Here is my interceptor code :

\'use strict\'         


        

Answer 1

Here is an example of the responseError interceptor and the corresponding jasmine spec.

angular.module('interceptorDemo').factory('redirectInterceptor', ['$q', '$window', function($q, $window) {
    'use strict';

    function handleUnauthorizedAccess(config) {
        if (401 === config.status) {
            $window.location = '/signIn/';
        }
        return $q.reject(config);
    }

    return {
        responseError: handleUnauthorizedAccess
    };
}]);

The interceptor intercepts the ajax request, if the request is failed, then if the status code is 401 then user is redirected to signIn page.

Jasmine spec for the same is:

describe('redirectInterceptor specs', function() {

    var redirectInterceptor, $q;

    beforeEach(module('interceptorDemo'));

    beforeEach(function() {
        $window = {
            location: {
                href: null
            }
        };

        module(function($provide) {
            $provide.value('$window', $window);
        });
    });

    beforeEach(inject(function(_redirectInterceptor_, _$q_) {
        redirectInterceptor = _redirectInterceptor_;
        $q = _$q_;
        spyOn($q, 'reject');
    }));

    describe('redirectInterceptor specs', function() {
        it('should redirect to signIn page for unauthorized access', function() {
            var response = {
                status: 401,
                config: {}
            };
            var promise = redirectInterceptor.responseError(response);
            expect($window.location).toBe('/singIn/');
            expect($q.reject).toHaveBeenCalled();
        });

        it('should not redirect to signIn page for error code other than unauthorized access', function() {
            var response = {
                status: 404,
                config: {}
            };
            var promise = redirectInterceptor.responseError(response);
            expect($window.location).toEqual({
                href: null
            });
            expect($q.reject).toHaveBeenCalled();
        });

    });
});

We have spied on the $q so we can also test that the reject is called for the 401 error.