Making Methods All Static in Class

Question

I was told by my colleague based on one of my classes (it is an instance class) that if you have no fields in your class (backing fields), just make all methods static in th

Answer 1

As long as you don't need to create any abstraction from your class then static methods are fine. If your class needs to be mocked or implement any sort of interface then you're better off making the class a singleton, since you cannot mock static methods on classes. You can have a singleton implement an interface and can inherit instance methods from a singleton whereas you cannot inherit static methods.

We generally use singletons instead of static methods to allow our classes to be abstracted easily. This has helped in unit testing many times since we've run into scenarios where we wanted to mock something and could easily do so since the behavior was implemented as instance methods on a singleton.