svelte/test/runtime/samples/key-block-component-slot/_config.js

let logs = [];

export default {
	html: '<button>Reset!</button>',
	get props() {
		return { logs };
	},

	before_test() {
		logs = [];
	},

	async test({ assert, target }) {
		assert.deepEqual(logs, ['mount']);

		const button = target.querySelector('button');

		const click = new window.MouseEvent('click');
		await button.dispatchEvent(click);

		assert.deepEqual(logs, ['mount', 'unmount', 'mount']);
	}
};