testing▌

<default_to_action> When testing APIs or designing API test strategy:

vitest-testing

To test local web applications, write native Python Playwright scripts.

Use this skill to generate comprehensive Vitest tests for all code examples in a concept documentation page. Tests verify that code examples in the documentation are accurate and work as described.

End-to-end (E2E) testing validates complete user workflows from the UI through all backend systems, ensuring the entire application stack works together correctly from a user's perspective. E2E tests simulate real user interactions with browsers, handling authentication, navigation, form submissions, and validating results.

Install: npm install --save-dev @testing-library/react @testing-library/dom. Recommended extras: @testing-library/user-event and @testing-library/jest-dom. React 19 requires v16.1.0+.

Evaluate A/B test results with statistical rigor and translate findings into clear product decisions.

User can provide a what tests or modules to focus on:

Create comprehensive test scenarios from user stories with test objectives, starting conditions, user roles, step-by-step test actions, and expected outcomes.

User can provide to focus on specific tests or modules: