import swc from 'unplugin-swc'; import { defineConfig } from 'vitest/config'; // NestJS relies on decorator metadata, which esbuild (Vitest's default // transformer) cannot emit — SWC (configured via .swcrc) can. export default defineConfig({ plugins: [swc.vite({ module: { type: 'es6' } })], test: { environment: 'node', }, });