kcd-testing

Full-stack integration tests using Playwright and a real PostgreSQL database simulate user interactions end-to-end without mocks. You write tests validating observable behavior, ensuring actions like form submissions correctly update the live database and redirect users appropriately.

Testing user authentication without mocks involves running Playwright against a live PostgreSQL database. This approach validates real user sign-ups and logins by checking actual database records and observable redirections rather than relying on simulated implementation details.

Playwright supports testing responsive design and CRUD operations simultaneously by automating real browser interactions. You can validate form inputs, verify data persistence in PostgreSQL, and check UI layout across different viewport sizes within a single end-to-end test suite.

Using a real database instead of mocks for end-to-end testing ensures your tests validate actual data persistence and full system integration. This behavior-driven approach tests observable user actions against a live PostgreSQL instance, catching integration issues mocks often miss.

You can use Playwright for ad-hoc browser automation and quick screenshots to gain immediate visual feedback. Beyond structured test suites, it provides utilities to script common browser interaction patterns, perform rapid checks, and capture page states during development.

Validating form validation errors using end-to-end tests involves using Playwright to simulate incorrect user inputs and assert that observable error messages appear. This behavior-driven method checks the actual UI response against invalid data without probing internal code logic.