casper .start(casper.cli.get('baseUrl')) .then(function () { this.wait(5000, function() { this.test.assertExists('#drawing-canvas-container canvas', 'Check if drawing canvas element is created'); this.test.assertExists('#preview-list .preview-tile', 'Check if first frame is created'); this.test.assertExists('#preview-canvas-container canvas', 'Check if animation preview canvas is created'); }); }) .run(function () { this.test.done(); });