import { defineConfig } from 'vitest/config';

export default defineConfig({
  test: {
    environment: 'jsdom',
    globals: true,
    setupFiles: ['./src/test-setup.ts'],
    // Pin test runner timezone to UTC so WR-05 date-extraction tests are deterministic
    // regardless of the developer's local machine zone or CI runner zone.
    // With TZ=UTC, new Date('2026-06-10T23:30:00-04:00').getFullYear() etc. return the
    // UTC wall-clock values, making assertions stable across EDT/PST/UTC environments.
    env: { TZ: 'UTC' },
    // Prevent Vitest's default **/*.{test,spec}.ts glob from picking up
    // apps/pwa/e2e/*.spec.ts files, which import @playwright/test APIs
    // (devices, etc.) that are not available in the jsdom environment.
    // See Phase 7 RESEARCH.md §Pitfall 1.
    exclude: ['e2e/**', 'node_modules/**'],
  },
});