import { defineConfig } from 'vitest/config';

export default defineConfig({
  test: {
    environment: 'node',
    include: ['test/**/*.test.ts'],
    /*
     * One file at a time.
     *
     * These are integration tests against ONE live database, and several files
     * mutate rows the seed owns — deck.router deletes every request and swipe on
     * the seeded job in a beforeEach, others create verified pros that land on
     * that same job's deck. Run in parallel, a file can see another's writes
     * between its own `before` and `after` reads, so `remaining` counts and
     * fixture lookups fail perhaps one run in three.
     *
     * The alternative is a database per worker, which is the right answer at a
     * larger scale and a lot of machinery for a suite this size. Until then,
     * serialising costs a few seconds and removes the whole class.
     */
    fileParallelism: false,
  },
});