svelte/test/runtime/samples/set-in-onstate/_config.js

export default {
	skip_if_ssr: true, // uses oncreate

	html: `
		<p>1</p>
		<p>2</p>
	`,

	test({ assert, component, target }) {
		component.foo = 2;
		assert.htmlEqual(target.innerHTML, `
			<p>2</p>
			<p>4</p>
		`);
	}
};