Vitest - How to exclude specific files and folders?

Question

I am migrating my project from jest to vitest and I wanna exclude certain files and folders for both test and coverage, I am following the docs but "exclude" does not seem working, whenever I run some test, vitest throws an error that is coming from config folder and I don't have any test files there, inside the config folder I have bunch of config files including setupTests.ts and i18n specific config, the error is coming from the i18n.ts file. I am using vite 3 and Below is my vite config file, How else can I exclude files and folders?

Environment:

• Windows 11
• Node 16.14.0
• Vite 3.1.0
• Vitest 0.23.4
• List item

Edit: So it turns out the issue is in the setupTests.ts file where I am mocking the react-i18next, typescript was throwing an error when I tried to do "const actual = await vi.importActual(''react-i18next''); return {...actual, ...}" ignoring typescript works.

vi.mock('react-i18next', () => ({
  ...vi.importActual('react-i18next'), // this didn't work
  useTranslation: () => [(key: any) => key],
}));


vi.mock('react-i18next', () => {
  const acutal = vi.importActual('react-i18next'), // this didn't work either
  return {
         ...actual, 
         useTranslation: () => [(key: any) => key],
   };
}); 



  vi.mock('react-i18next', async () => {
  const actual = await vi.importActual('react-i18next'); // this works
  return {
    // @ts-ignore  // have to put this here as typescript was complaining
    ...actual,
    useTranslation: () => [(key: any) => key],
  };
});

---

vite.config.ts

/// <reference types="vitest" />
import { defineConfig } from 'vite';
import react from '@vitejs/plugin-react';
import tsconfigPaths from 'vite-tsconfig-paths';

// https://vitejs.dev/config/
export default defineConfig({
  plugins: [
    react(),
    tsconfigPaths(),
  ],
  test: {
    globals: true,
    environment: 'jsdom',
    setupFiles: './src/config/setupTests.ts',
    css: true,
    mockReset: true,
    restoreMocks: true,
    clearMocks: true,
    include: ['./src/**/*.{test,spec}.{js,mjs,cjs,ts,mts,cts,jsx,tsx}'],
    exclude: [
      '**/node_modules/**',
      '**/dist/**',
      '**/cypress/**',
      '**/.{idea,git,cache,output,temp}/**',
      './src/config/**',
    ],
    coverage: {
      exclude: ['./src/config'],
    },
  },
}); ```

Answer 1

We can use exclude attribute with in test configuration.

vitest configuartion can be modified in vitest.config.ts file. If we want to exclude shared folder packages, we could add shared/* to the exclude section as shown below

import { configDefaults } from 'vitest/config'

export default defineConfig({
  plugins: [react(), tsconfigPaths()],
  test: {
    exclude:[
      ...configDefaults.exclude, 
      'shared/*'
    ]
  },
});

Here configDefaults contains the excluded default folders like node_modules which is available to use from vitest/config package. If we omit the configDefaults.exclude it will run checks in node_modules folder too.

More details can be found here on official documentation.

Note: I have tested it as of 14th dec, 22