import { defineConfig } from "vitest/config";

// Unit tests for the pure helpers in src/lib — deliberately separate from vite.config.ts so the
// production build never has to load vitest. Plain node env (no jsdom): these tests stub the
// modules that touch the DOM. Browser flows stay in e2e/ under Playwright (`siftlode e2e`).
// Being its own file means vite.config.ts is NOT merged in — a future test that renders a .tsx
// component has to wire @vitejs/plugin-react (and a DOM environment) here itself.
export default defineConfig({
  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. (Such a test must still wire plugin-react +
    // a DOM environment here — see above — but at least it will run and say so.)
    include: ["src/**/*.test.{ts,tsx}"],
    environment: "node",
  },
});