Refactoring

vite.config.ts

@@ -1,4 +1,5 @@
-import { defineConfig } from 'vite'
+/// <reference types="vitest" />
+import { defineConfig } from 'vitest/config'
 import react from '@vitejs/plugin-react'
 
 // https://vite.dev/config/
@@ -6,4 +7,9 @@ export default defineConfig({
   plugins: [react()],
   // IMPORTANT: Replace 'sheet-music-trainer' with your GitHub repository name
   base: '/',
+  test: {
+    globals: true,
+    environment: 'jsdom',
+    setupFiles: './src/test/setup.ts',
+  },
 })