开云体育

I find that the design signals that I get directly during refactoring are actually pretty weak. There are code smells, but these aren't the signals. The code smells are things that you or other people have determined generally tend to make the design better, but this is just something that you recognize from experience.

I find the actual design signals come about when trying to create a test or to make a test pass. I get strong signals such as "It's not clear to me how to make this pass", or "I'm having to make changes in a lot of places to make this pass," or "I'm having to write a lot of test code to show what I'm trying to achieve." This leads to me doing more preparatory refactoring than other kinds of refactoring, because the signals are strongest then.