svelte/test/runtime/samples/class-helper/_config.js

export default {
	data: {
		user: { active: true }
	},
	html: `<div class="active"></div>`,

	test ( assert, component, target, window ) {
		component.set({ user: { active: false }});

		assert.htmlEqual( target.innerHTML, `
			<div class></div>
		` );
	}
};