export default { test({ assert, component, target, window, raf }) { component.visible = true; const div = target.querySelector('div'); assert.equal(window.getComputedStyle(div).opacity, 0); raf.tick(200); assert.equal(window.getComputedStyle(div).opacity, 0.5); raf.tick(400); assert.equal(window.getComputedStyle(div).opacity, 1); raf.tick(500); } };