Convert any function with side effects to testable side-effect-free
Written by Grigory Rechistov in Uncategorized on 01.11.2022. Tags: refactoring,
When dealing with legacy code (== code without existing tests), the first task before making behavioral changes is to prepare characterization tests. The easiest way to achieve that is to separate the pure computation from communication inside the existing functions.
But it is a daunting task, because you do not have …