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Vitest: Error: Missing "./messages" export in "@intlify/vite-plugin-vue-i18n" package

See original GitHub issue

Reporting a bug?

I use @intlify/vite-plugin-vue-i18n to load my translation files.

When I run Vitest, im getting the following error:

Error: Missing “./messages” export in “@intlify/vite-plugin-vue-i18n” package

When I run vite or vite build, everything works as expected.

Expected behavior

The tests are using my translations.

Reproduction

vite.config.ts

import vueI18n from '@intlify/vite-plugin-vue-i18n'
import vue from '@vitejs/plugin-vue'
import { dirname, resolve } from 'node:path'
import { fileURLToPath } from 'url'
import { defineConfig } from 'vitest/config'
import GithubActionsReporter from 'vitest-github-actions-reporter'

export default defineConfig({
  plugins: [
    vue(),
    vueI18n({
      include: resolve(dirname(fileURLToPath(import.meta.url)), './src/locales/**'),
    }),
  ],
  resolve: {
    alias: {
      '@': fileURLToPath(new URL('./src', import.meta.url)),
    },
  },
  test: {
    globals: true,
    environment: 'jsdom',
    include: ['**/*.unit.ts'],
    setupFiles: ['./tests/unit/setup.ts'],
    reporters: process.env.GITHUB_ACTIONS !== undefined ? new GithubActionsReporter() : 'default',
    coverage: {
      reporter: 'lcov',
    },
  },
})

tests/unit/setup.ts

import '@testing-library/jest-dom'

import { config } from '@vue/test-utils'

import { i18n } from '@/i18n'

beforeAll(() => {
  // some mocks
  vi.mock('chart.js', () => ({
    registerables: [],
    Chart: {
      register: () => null,
    },
  }))

  config.global.plugins = [ i18n ]
})

@/i18n.ts

import messages from '@intlify/vite-plugin-vue-i18n/messages'
import { createI18n } from 'vue-i18n'

export const i18n = createI18n({
  locale: 'nl',
  fallbackLocale: 'en',
  legacy: false,
  messages,
})

Issue Package

vite-plugin-vue-i18n

System Info

System:
    OS: macOS 12.4
    CPU: (8) arm64 Apple M1 Pro
    Memory: 82.83 MB / 16.00 GB
    Shell: 5.8.1 - /bin/zsh
  Binaries:
    Node: 16.15.1 - /opt/homebrew/opt/node@16/bin/node
    Yarn: 1.22.19 - /opt/homebrew/bin/yarn
    npm: 8.11.0 - /opt/homebrew/opt/node@16/bin/npm
  Browsers:
    Firefox: 102.0.1
    Safari: 15.5
  npmPackages:
    @intlify/vite-plugin-vue-i18n: ^5.0.0 => 5.0.0
    vite: ^3.0.0 => 3.0.0
    vue: ^3.2.0 => 3.2.37
    vue-i18n: 9 => 9.1.10

Screenshot

Additional context

No response

Validations

Read the Contributing Guidelines.
Read the README
Check that there isn’t already an issue that reports the same bug to avoid creating a duplicate.
Check that this is a concrete bug. For Q&A open a GitHub Discussion.