svelte/test/runtime/samples/head-title-dynamic/_config.js

export default {
	get props() {
		return { adjective: 'custom' };
	},

	test({ assert, component, window }) {
		assert.equal(window.document.title, 'a custom title');

		component.adjective = 'different';
		assert.equal(window.document.title, 'a different title');
	}
};