January 2026
Intermediate to advanced
412 pages
8h 38m
English
Content preview from Hands-On Automated Testing with Playwright
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8
Headless Testing and Debugging
When you’re building and running automated tests, it’s helpful to know what’s going on behind the scenes and even more helpful when things don’t go as planned. That’s where this chapter comes in.
We’re going to explore two important topics: headless testing and debugging in Playwright. Headless mode is great when you want your tests to run fast and quietly in the background. It’s perfect for continuous integration or large test suites. But sometimes, you need to actually see what’s happening on the screen. That’s when headful mode (with the browser window open) comes in handy.
We’ll also walk through some awesome debugging tools Playwright gives you, such as the Inspector, UI Mode, and ways to capture screenshots ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.