MEGAINFRA-WEBAPP/vitest.config.ts

import { defineConfig } from "vitest/config";
import path from "node:path";

// React only exposes `act` in its development build, so a shell with
// NODE_ENV=production would break every component test. Vitest only sets
// NODE_ENV when it is unset, so force it.
//
// Next's `next/types/global` declares NODE_ENV on ProcessEnv as `readonly`,
// so a plain `process.env.NODE_ENV = "test"` fails the type check that
// `next build` runs over this file (tsconfig includes **/*.ts) and takes
// the whole deployment down. Object.assign has no source-to-target
// assignability constraint, so it compiles while still writing the value
// through process.env's setter at runtime.
Object.assign(process.env, { NODE_ENV: "test" });

export default defineConfig({
  resolve: {
    alias: [
      { find: "@", replacement: path.resolve(__dirname, "./src") },
      // The `server-only` package ships inside Next.js' compiled dependencies
      // and cannot be resolved by Vitest; point it at an empty stand-in.
      { find: /^server-only$/, replacement: path.resolve(__dirname, "./src/test-support/server-only.ts") },
    ],
  },
  test: {
    environment: "node",
    include: ["src/**/*.test.{ts,tsx}"],
    // The PDF/PNG split test shells out to poppler; it takes a few seconds on
    // its own and times out when the whole suite runs in parallel.
    testTimeout: 15000,
  },
});