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

// Unit + component/hook tests, deliberately separate from vite.config.ts so the production build
// never has to load vitest. The DEFAULT environment is node (the pure src/lib helpers — fast, no
// DOM). A test that needs the DOM (component render or renderHook) opts INTO jsdom per-file with a
//   // @vitest-environment jsdom
// docblock on its first line. plugin-react is wired here so those tests get JSX + a Fast-Refresh-
// free React transform; it is a no-op for the plain .ts node tests (they carry no JSX). jsdom is a
// devDependency referenced only via that docblock env string — knip's vitest plugin still sees it.
export default defineConfig({
  plugins: [react()],
  test: {
    // .tsx included on purpose: a test file the glob misses does not fail, it is simply never
    // collected, and the gate still prints green.
    include: ["src/**/*.test.{ts,tsx}"],
    environment: "node",
  },
});