vitest.config.ts

import { defineConfig } from 'vitest/config';
import react from '@vitejs/plugin-react';

export default defineConfig({
  plugins: [react()],
  test: {
    environment: 'jsdom',
    globals: true,
    setupFiles: ['./src/test-setup.ts'],
    include: ['src/**/*.test.{ts,tsx}'],
    coverage: {
      provider: 'v8',
      include: ['src/lib/**'],
      exclude: [
        'src/lib/sample-data.ts', // dynamic imports only, untestable
        'src/lib/local-storage.ts', // IndexedDB not available in jsdom
        'src/lib/zip.ts', // File.arrayBuffer() not available in jsdom
      ],
      reporter: ['text', 'lcov'],
      thresholds: {
        lines: 80,
        functions: 70,
        statements: 80,
        branches: 65,
      },
    },
  },
});