How to control time zones and timeouts in Playwright
AI Summary
This video by Stefan Judis, a Playwright Ambassador, explores advanced testing strategies for handling time zones and timers using Playwright. The video focuses on two common challenges in testing: applications that display time based on user local time zones, and applications with long running timers that require timeouts. Stefan demonstrates how to test multiple time zones by setting the time zone ID in Playwright tests and iterating over an array of time zones for comprehensive coverage. He also introduces the Playwright Clock API, which allows developers to control and fast-forward JavaScript timers to avoid waiting during tests. Examples include testing a 5-minute timer by fast forwarding the clock to validate UI changes quickly. The video provides practical code demonstrations and encourages developers to explore the Playwright Clock API for robust and efficient end-to-end time-related testing.
Key points covered:
- Testing across multiple time zones using Playwright
- Using Playwright’s Clock API to control and test JavaScript timeouts
- Writing efficient tests that avoid waiting for real timeouts
- Practical example of testing UI timers with fast forwarding
The video also references Playwright Clock API docs and Checkly Synthetic Monitoring as additional resources.