Example JavaScript!

call-list-spec.js

describe('CallList', function() {
  var subject;
  beforeEach(function() {
    subject = new CallList({items: ['A','B','C']});
  });

  describe("#moveUp", function() {
    context("moving up C", function() {
      beforeEach(function() {
        subject.moveUp('C');
      });

      it("places it above B", function() {
        expect(subject.get('items')).toEqual(['A','C','B']);
      });
    });
  });
});

call-list.js

window.CallList = Backbone.Model.extend({
  moveUp: function(item) {
    this.set({items: ['A','C','B']});
  }
});