vitest.config.ts

import react from "@vitejs/plugin-react";
import { defineConfig, type Plugin } from "vitest/config";
import { fileURLToPath } from "node:url";

/**
 * Load GLSL shader files as raw string default exports, mirroring the
 * Next/Turbopack `raw-loader` rule in next.config.ts so engine code that
 * imports `.vert`/`.frag` sources can be exercised under vitest.
 */
function rawGlsl(): Plugin {
  return {
    name: "raw-glsl",
    transform(code, id) {
      if (!/\.(vert|frag|glsl)$/.test(id)) return null;
      return { code: `export default ${JSON.stringify(code)};`, map: null };
    },
  };
}

export default defineConfig({
  plugins: [rawGlsl(), react()],
  test: {
    environment: "jsdom",
    globals: true,
    setupFiles: ["./vitest.setup.ts"],
    include: ["**/*.test.{ts,tsx}"],
    exclude: ["node_modules", ".next", ".npm-cache"],
  },
  resolve: {
    alias: {
      "@": fileURLToPath(new URL("./", import.meta.url)),
    },
  },
});