describe('Utils', function () { 'use strict'; var expect = chai.expect; it('requestAnimationFrame exists', function () { expect(global).to.respondTo('requestAnimationFrame'); }); it('cancelAnimationFrame exists', function () { expect(global).to.respondTo('cancelAnimationFrame'); }); it('requestAnimFrame exists', function () { expect(global).to.respondTo('requestAnimFrame'); }); });