lecture 14 of 170 completed

Forensic debugging with traces

Playwright records enough to diagnose a failure you never saw. Most engineers use a fraction of it, so this is the method.

What you'll learn

  • What a trace records beyond a screenshot
  • The order to read one in
  • How to classify a failure before digging

A test failed once, three days ago, on a machine that no longer exists. You have a trace file. That is enough, and the method below is how a senior engineer gets from that file to a cause in minutes rather than an afternoon.

Configure it so the evidence exists.

full course

Keep reading with the full course

The Foundations track and the first lessons in each framework are free. This lesson needs full course access. A course plan includes all lessons for Playwright, Cypress and Selenium.

See course plans →