How to Test Atomic Transaction Rollbacks in Playwright Across UI and API

A technical guide published on DEV Community outlines a Playwright end-to-end testing approach for verifying atomic transaction rollback behaviour. The method uses page.route to intercept and deliberately fail an intermediate API call, such as an inventory update, after a preceding step like payment has succeeded. Both the UI and backend state are then checked to confirm the rollback occurred correctly, using Playwright's request.newContext() for direct API validation. The expect.poll utility is recommended over static timeouts to handle asynchronous rollback operations reliably. Key takeaways highlight network interception, independent API session management, and resilient polling as the pillars of this testing architecture.