Testing Backbone Model using Jasmine

Question

It is the first time I write a javascript test for a Backbone Model.
Looking in the web resource there are not so many items about this subject.
I found this one, Testing Backbone applications with Jasmine and Sinon, which is pretty old (mars 2001).

Anyway I would like to know:
1) there are other resource more update about this subject
2) the text I wrote (1) is fine or can be improved.

---

(1)

describe('User model', function () {
    beforeEach(function () {
        this.model = new User();
        this.collection = new UserCollection();
    });

    describe('When creating models', function () {
        it('the url should be equal at corresponding api_get_users value', function () {
            expect(this.model.url()).toEqual(backendRouter.generate('api_get_users'));
        });

        describe('when no id is set', function () {
            it('should return the collection URL', function () {
                expect(this.model.url()).toEqual(this.collection.url);
            });

        });
        describe('when id is set', function () {
            it('should return the collection URL and id', function () {
                this.model.set({id: 1});
                expect(this.model.url()).toEqual(this.collection.url + '/' + this.model.get('id'));
            });
        });

    });

    describe('when fetching model from server', function () {
        beforeEach(function () {
            this.model.set({id: 1});
            this.fixture = this.fixtures.Users.valid;
            this.fixtureResponse = this.fixture.response.users[0];
            this.server = sinon.fakeServer.create();
            this.server.respondWith(
                'GET',
                backendRouter.generate('api_get_users') + '/' + this.model.get('id'),
                JSON.stringify(this.fixtureResponse)
            );
        });

        afterEach(function () {
            this.server.restore();
        });

        it('should make the correct request', function () {
            this.model.fetch();
            expect(this.server.requests.length).toEqual(1);
            expect(this.server.requests[0].method).toEqual('GET');
            expect(this.server.requests[0].url).toEqual(this.model.url());
        });

        it('should the response not change', function () {
            this.model.fetch();
            this.server.respond();
            expect(this.fixtureResponse).toEqual(this.model.attributes);
        });

        it('should exhibit mandatory attributes', function () {
            expect(this.model.get('id')).toBeGreaterThan(0);
        });
    });

});