test: add initial component tests (#923)

Co-authored-by: Benjamin Canac <canacb1@gmail.com>

test/components/Button.spec.ts

@@ -0,0 +1,24 @@
+// @vitest-environment nuxt
+import { describe, it, expect } from 'vitest'
+import Button from '../../src/runtime/components/elements/Button.vue'
+import type { TypeOf } from 'zod'
+import ComponentRender from './component-render'
+
+type ButtonOptions = TypeOf<typeof Button.props>
+
+describe('Button', () => {
+  it.each([
+    [ 'basic case', { } ],
+    [ 'leading icon', { props: { leading: true, icon: 'heroicons-check' } } ],
+    [ 'black solid', { props: { color: 'black', variant: 'solid' } } ],
+    [ 'rounded full', { props: { ui: { rounded: 'rounded-full' } } } ],
+    [ '<UButton icon="i-heroicons-pencil-square" size="sm" color="primary" square variant="solid" />' ]
+  ])('renders %s correctly', async (nameOrHtml: string, options: ButtonOptions) => {
+    if (options !== undefined) {
+      options.slots = options.slots || { default: () => 'label' }
+      options.slots.default = options.slots.default || (() => 'label')
+    }
+    const html = await ComponentRender(nameOrHtml, options, Button)
+    expect(html).toMatchSnapshot()
+  })
+})