import { experimental_AstroContainer as AstroContainer } from 'astro/container'; import { expect, test } from 'vitest'; import Card from '../src/components/Card.astro'; test('Card with slots', async () => { const container = await AstroContainer.create(); const result = await container.renderToString(Card, { slots: { default: 'Card content', }, }); expect(result).toContain('This is a card'); expect(result).toContain('Card content'); });