vendure/packages/testing/vitest.config.mts

import swc from 'unplugin-swc';
import { defineConfig } from 'vitest/config';

export default defineConfig({
    plugins: [
        // SWC required to support decorators used in test plugins
        // See https://github.com/vitest-dev/vitest/issues/708#issuecomment-1118628479
        // Vite plugin
        swc.vite({
            jsc: {
                transform: {
                    // See https://github.com/vendurehq/vendure/issues/2099
                    useDefineForClassFields: false,
                },
            },
        }),
    ],
});