const items = [ {}, {} ]; export default { 'skip-ssr': true, data: { foo: items[0], items }, test ( assert, component, target ) { const options = target.querySelectorAll( 'option' ); assert.equal( options[0].selected, true ); assert.equal( options[1].selected, false ); component.set( { foo: items[1] } ); assert.equal( options[0].selected, false ); assert.equal( options[1].selected, true ); } };