Depends on the context and scope. If it's something simple I can grok by reading the code and tests I usually don't. If it's a complex piece of code, I find i

Depends on the context and scope. If it's something simple I can grok by reading the code and tests I usually don't. If it's a complex piece of code, I find it valuable to run it locally, to setup some breakpoints, debug it and step it to understand it better.