scripts/parity_e2e/playwright.config.ts

import { defineConfig } from '@playwright/test';
import * as path from 'node:path';

/**
 * Playwright config for the Layer-3 parity spec.
 *
 * The spec serves the built React app via a tiny static server
 * (see webServer below) and loads the standalone HTML straight from
 * the repo via file://, so no pypowsybl backend is required.
 */
export default defineConfig({
  testDir: __dirname,
  testMatch: ['*parity.spec.ts', 'demo_*.spec.ts'],
  timeout: 90_000,
  globalSetup: require.resolve('./playwright.global-setup.ts'),
  globalTeardown: require.resolve('./playwright.global-teardown.ts'),
  // Text snapshots (DOM/SVG sérialisés et normalisés par
  // `demo_visual_snapshots.spec.ts`) are OS-agnostic by construction
  // — no antialias, no font rendering, only attribute values + class
  // names. Drop the default `{-projectName}{-platform}` suffix so the
  // same baseline runs on macOS (dev) and Linux (CI). Per-channel
  // separation (chromium vs firefox) would only matter if we add a
  // non-chromium project, which we don't.
  snapshotPathTemplate: '{testFilePath}-snapshots/{arg}{ext}',
  reporter: [['list'], ['html', { open: 'never' }]],
  use: {
    baseURL: 'http://localhost:4173/',
    trace: 'retain-on-failure',
    screenshot: 'only-on-failure',
  },
  webServer: {
    // `vite preview` serves the production build. If the build is
    // missing, fail fast rather than run against a stale dist.
    command: 'npm --prefix ../../frontend run preview -- --port 4173 --strictPort',
    port: 4173,
    reuseExistingServer: !process.env.CI,
    timeout: 60_000,
    cwd: path.resolve(__dirname),
  },
  projects: [
    { name: 'chromium', use: { channel: 'chromium' } },
  ],
});