events-spec.js

it('should trigger an event when things are retrieved', function() {
    var server = Sinon.fakeServer.create();
    server.respondWith(/\/thing\/(\d+)/, function (xhr, id) {
        xhr.respond(200, { "Content-Type": "application/json" }, JSON.stringify(new Thing({ id: id, text: 'Hello' })));
    });
    var ventInvoked = false;
    vent.on('thingReceived', function(thing) {
        expect(thing.get('id')).toEqual(123);
        ventInvoked = true;
    });
    vent.trigger('thingRequested', 123);
    server.respond();
    expect(ventInvoked).toBeTruthy();
    server.restore();
});

events.js

this.vent.on('thingRequested', function(id) {
    var thing = new Thing({ id: id });
    thing.fetch({
        success: function(thing, response, options) {
            self.vent.trigger('thingReceived', thing);
        },
        error: function(thing, response, options) {
            console.error('Unable to get thing');
        }
    });
});

thing.js

define([
    'lodash',
    'backbone'
],
    function (_, Backbone) {
        return Backbone.Model.extend({
            url: function() {
                return '/thing/' + this.get('id');
            }
        });
    });