Nuxt/test/nuxt/nuxt-island.test.ts

import { describe, expect, it, vi } from 'vitest'
import { h } from 'vue'
import { createServerComponent } from '../../packages/nuxt/src/components/runtime/server-component'

vi.mock('vue', async (original) => {
  const vue = await original<typeof import('vue')>()
  return {
    ...vue,
    h: vi.fn(vue.h)
  }
})

describe('runtime server component', () => {
  it('expect no data-v- attrbutes #23051', () => {
    // @ts-expect-error mock
    vi.mocked(h).mockImplementation(() => null)

    // @ts-expect-error test setup
    createServerComponent('DummyName').setup!({
      lazy: false
    }, {
      attrs: {
        'data-v-123': '',
        test: 1
      },
      slots: {},
      emit: vi.fn(),
      expose: vi.fn()
    })()

    expect(h).toHaveBeenCalledOnce()
    if (!vi.mocked(h).mock.lastCall) { throw new Error('no last call') }
    expect(vi.mocked(h).mock.lastCall![1]?.props).toBeTypeOf('object')
    expect(vi.mocked(h).mock.lastCall![1]?.props).toMatchInlineSnapshot(`
      {
        "data-v-123": "",
        "test": 1,
      }
    `)
  })
})