Spying on bound methods

gistfile1.js

describe('A hypothetical situation', function () {

    var View = Backbone.View.extend({
        initialize: function () {
            this.model = new Backbone.Model;
            this.model.on('change', this.render, this);
        }
    }), instance;

    beforeEach(function () {
        instance = new View();
    });

    it('view renders on model change', function () {
        spyOn(instance, 'render');
        instance.model.trigger('change');
        expect(instance.render).toHaveBeenCalled(); // fails
    });

});

Spy on the prototype of the view instead:

    spyOn(View.prototype, 'render');

That still fails. Changing the event binding to:

this.model.on('change', function () { this.render(); }, this);

works, but is ugly.