svelte/test/runtime/samples/select-one-way-bind-object/_config.js

const items = [ {}, {} ];

export default {
	skip_if_ssr: true,

	props: {
		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.foo = items[1];

		assert.equal( options[0].selected, false );
		assert.equal( options[1].selected, true );
	}
};