Test: migrate demos tests to Playwrite#33848
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Pull request overview
Adds a Playwright-based visual regression test runner for demos (common screenshots) and wires it into the monorepo (Nx target + package scripts) and CI (new GitHub Actions workflow), replacing/augmenting the existing TestCafe-driven approach for this scenario.
Changes:
- Introduces Playwright common-screenshots spec + supporting utilities (demo discovery, page prep, screenshot comparison + diff artifacts).
- Adds Playwright configuration and Nx/script entry points to run the new suite.
- Adds a dedicated GitHub Actions workflow to build DevExtreme artifacts and execute Playwright screenshots in a matrix.
Reviewed changes
Copilot reviewed 9 out of 10 changed files in this pull request and generated 1 comment.
Show a summary per file
| File | Description |
|---|---|
| pnpm-lock.yaml | Locks the new Playwright dependency and resulting transitive dependency graph changes. |
| apps/demos/utils/visual-tests/playwright/screenshot-comparer.ts | Implements screenshot capture + looks-same comparison with diff/mask handling and artifact copying. |
| apps/demos/utils/visual-tests/playwright/common-screenshots.spec.ts | Playwright test suite that iterates demos/frameworks and validates screenshots. |
| apps/demos/utils/visual-tests/playwright/common-screenshots-utils.ts | Shared utilities for filtering/selection, client script injection, URL building, and page prep. |
| apps/demos/tsconfig.json | Includes playwright.*.ts files in TypeScript compilation for the demos app. |
| apps/demos/tsconfig.eslint.json | Includes playwright.*.ts files for ESLint type-aware linting. |
| apps/demos/project.json | Adds Nx target test-playwright-common-screenshots. |
| apps/demos/playwright.common-screenshots.config.ts | Playwright runner configuration (workers, retries, chromium args/channel, artifact output dirs). |
| apps/demos/package.json | Adds @playwright/test dependency and test-playwright-common-screenshots script. |
| .github/workflows/visual-tests-demos-playwright.yml | New CI workflow to run Playwright common screenshots in a theme/partition matrix. |
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