svelte/test/runtime/samples/key-block-expression-2/_config.js

export default {
	html: `<div>3</div>`,
	async test({ assert, component, target, window }) {
		const div = target.querySelector("div");

		await component.mutate();
		assert.htmlEqual(target.innerHTML, `<div>5</div>`);
		assert.strictEqual(div, target.querySelector("div"));

		await component.reassign();
		assert.htmlEqual(target.innerHTML, `<div>7</div>`);
		assert.strictEqual(div, target.querySelector("div"));

		await component.changeKey();
		assert.htmlEqual(target.innerHTML, `<div>7</div>`);
		assert.notStrictEqual(div, target.querySelector("div"));
	}
};