svelte/test/runtime/samples/event-handler-each-context-invalidation/_config.js

export default {
	html: `
		<button>off</button>
		<button>on</button>
		<button>off</button>
		<p>on: 1</p>
	`,

	async test({ assert, component, target, window }) {
		const buttons = target.querySelectorAll('button');
		const event = new window.MouseEvent('click');

		await buttons[0].dispatchEvent(event);
		assert.htmlEqual(target.innerHTML, `
			<button>on</button>
			<button>on</button>
			<button>off</button>
			<p>on: 2</p>
		`);

		await buttons[2].dispatchEvent(event);
		assert.htmlEqual(target.innerHTML, `
			<button>on</button>
			<button>on</button>
			<button>on</button>
			<p>on: 3</p>
		`);

		assert.deepEqual(component.switches, [
			{ on: true },
			{ on: true },
			{ on: true }
		]);
	}
};