How to wait for a specific API response in your Playwright end-to-end tests
AI Summary
The video explains how to use Playwright for end-to-end testing or synthetic monitoring, focusing on network layer interception. It demonstrates how to monitor API responses in a polling scenario where the frontend repeatedly requests a backend endpoint until a success status is received. The tutorial shows how to implement a Playwright test that waits for the correct API response by using
page.waitForResponsewith a custom callback to filter responses based on URL and response content. It emphasizes writing user-first tests but acknowledges cases where network-level checks are necessary to verify UI rendering correctness. The example includes real-time logging and how to assert UI changes based on API data. The video concludes with advice to balance UI tests with network monitoring to avoid flaky tests and mentions using Checkly with Playwright for global monitoring.