svelte/test/runtime/samples/component-data-dynamic-shorthand/_config.js

export default {
	get props() {
		return { foo: 42 };
	},

	html: '<div><p>foo: 42</p></div>',

	test({ assert, component, target }) {
		component.foo = 99;

		assert.equal(target.innerHTML, '<div><p>foo: 99</p></div>');
	}
};