test(Collapsible): add

test/components/Collapsible.spec.ts

@@ -0,0 +1,12 @@
+import { describe, it, expect } from 'vitest'
+import Collapsible, { type CollapsibleProps } from '../../src/runtime/components/Collapsible.vue'
+import ComponentRender from '../component-render'
+
+describe('Collapsible', () => {
+  it.each([
+    ['basic case', { props: { open: true }, slots: { default: () => 'Click me', content: () => 'Collapsible content' } }]
+  ])('renders %s correctly', async (nameOrHtml: string, options: { props?: CollapsibleProps, slots?: any }) => {
+    const html = await ComponentRender(nameOrHtml, options, Collapsible)
+    expect(html).toMatchSnapshot()
+  })
+})