# Cover-and-modify

> 고치고 기도하기와 비교되는, 코드를 수정하는 좋은 방법:

[고치고 기도하기](https://wiki.g15e.com/pages/Edit-and-pray.txt)와 비교되는, 코드를 수정하는 좋은 방법:

> Cover-and-modify is a different way of making changes. The idea behind it is that it is possible to work with a safety net when we change software. … Covering software means covering it with [tests](https://wiki.g15e.com/pages/Unit%20test.txt). When we have a good set of tests around a piece of code, we can make changes and find out very quickly whether the effects were good or bad. We still apply the same care, but with the [feedback](https://wiki.g15e.com/pages/Feedback.txt) we get, we are able to make changes more carefully. --<Working effectively with legacy code>