How to mock static void methods using EasyMock only?

Question

I want to mock A.notNull(obj) method in my TestB.java class using EasyMock. I am struggling to mock this method since one week.

//A.class
public class A
{
    public static void notNull(Object o)
    {
       notNull(o,"object is null");
    }
    public static void notNull(Object o, String s)
    { 
       if (o==null)
       {
           throw new IllegalArgumentException(s);   
       }
    }
 }

 //B.class
 Class<? extends E> obj;

 protected final Simple limit()
 {
     A.notNull(obj); //I want to mock this line in my TestB.java class using EasyMock framework
 }

Any help would be appreciated.

Easy mock does not support Static mocking, you need to use powermock along with easymock for it. — Gaurav Jeswani, Nov 19 '19 at 05:07
Thanks for your valuable response, but I am bound with EasyMock framework. Please suggest any other way with EasyMock itself. — Kinjal Rathod, Nov 19 '19 at 05:09
This is internal implementation detail and could be reasonably replaced by inlining the null check. Don't mock it; instead, confirm that `B` performs correctly when presented with a `null`. — chrylis -cautiouslyoptimistic-, Nov 19 '19 at 05:16
Not a good solution but still used at some places https://stackoverflow.com/a/12193017/4762502 — Gaurav Jeswani, Nov 19 '19 at 05:17
Class B performs null check correctly. It is giving class name in obj field. — Kinjal Rathod, Nov 19 '19 at 05:24

score 1 · Answer 1 · answered Nov 21 '19 at 03:40

Indeed, EasyMock doesn't support mocking static methods. You need to add PowerMock on top of it to do so.

However, in your case, I would indeed not mock notNull. It doesn't do anything that requires mocking. You don't even need this method since Objects.requireNotNull does the same thing.

How to mock static void methods using EasyMock only?

1 Answers1