Vite plugin breaks vitest coverage report

[anatolsommer]

As soon as the Vite plugin is used, all components (Vue 3 SFC) are marked as 100% covered.

import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'
import Components from 'unplugin-vue-components/vite'

export default defineConfig({
  plugins: [vue(), Components()],
  test: {
    global: true,
    environment: 'happy-dom'
  }
})

npx vitest run --coverage:

----------|---------|----------|---------|---------|-------------------
File      | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s 
----------|---------|----------|---------|---------|-------------------
All files |     100 |      100 |     100 |     100 |                   
 App.vue  |     100 |      100 |     100 |     100 |                   
----------|---------|----------|---------|---------|-------------------

Once I remove Components() from plugins: coverage works fine again:

----------|---------|----------|---------|---------|-------------------
File      | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s 
----------|---------|----------|---------|---------|-------------------
All files |   88.23 |      100 |       0 |   88.23 |                   
 App.vue  |   88.23 |      100 |       0 |   88.23 | 9-10              
----------|---------|----------|---------|---------|-------------------

I could provide a minimal example but this applies to everything using vite and vitest so it should be very easy to reproduce. (It makes no difference if there are resolvers included or not.)