What is the best way to incorporate ngRoute into Jasmine / Karma for testing AngularJS applications?

I am currently working on setting up a basic unit test example. Everything is running smoothly with this app.js:

var whapp = angular.module('whapp', [])
.filter('reverse', [function(){
    return function(string){
        return string.split('').reverse().join('');
    }
}]);

And this spec.js:

describe('Filters', function(){
    beforeEach(module('whapp'));
    describe('reverse', function(){
        var reverse, rootScope;
        beforeEach(inject(function($filter){
            reverse = $filter('reverse', {});
        }));
        it('Should reverse a string', function(){
            expect(reverse('rahil')).toBe('lihar');
        });
    });
});

Using this karma files configuration:

files: [
    'node_modules/angular/angular.js',
    'node_modules/angular-mocks/angular-mocks.js',
    'node_modules/angular-mocks/angular-route/angular-route.js',
    'node_modules/angular-mocks/angular-ui-router/release/angular-ui-router.js',
    'app/js/*.js',
    'tests/*.js'
]

The issue arises when I attempt to inject ngRoute into my module in app.js like this:

var whapp = angular.module('whapp', ['ngRoute'])
.filter('reverse', [function(){
    return function(string){
        return string.split('').reverse().join('');
    }
}]);

At this point, I encounter the following error in karma [UPDATE: this error persists even if I don't load the angular-mocks.js library into karma as shown above]:

TypeError: undefined is not a constructor (evaluating 'reverse('rahil')') in tests/spec.js (line 9)

So... how can I correctly inject ngRoute into spec.js? I have tried various approaches, but none have been successful.

Answer №1

It appears that the error is occurring because PhantomJS is unable to initialize your primary Angular module whapp. One potential explanation could be that the file

node_modules/angular-mocks/angular-route/angular-route.js
is not present.

It seems that you are utilizing npm to handle your dependencies. I recommend replacing your current file with:

node_modules/angular-route/angular-route.js

The same applies to the ui-route module:

node_modules/angular-ui-router/release/angular-ui-router.js

I trust that this solution will assist you in resolving the issue.

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