Mock Static Void methods using Mockito

Question

I have a class as follows:

class Abc{
    static void fun() throws AbcException{
        throw new Exception("Some exception message");
    }
    
    static{
        try{
            fun();
        }catch(AbcException ex){
            ex.printStackTrace();
        }
    }
}

fun() calls some other function and there is a chain of functions following it which throws AbcException if the environment is not configured properly. In Unit Test environment, I faced the AbcException as explained below.

(Also, there are many other methods in this class which I have mentioned)

I want to create an instance of class Abc in my test file. I'm using JUnit 4 and Mockito 4.8.1. I tried the following :

I wrote my test as follows:

@Before
public void setup(){
    try (MockedStatic<Abc> abc = mockStatic(Abc.class)) {
        // some test setup
    }
}

This didn't help because the AbcException was thrown when mockStatic(Abc.class) was called.

Is there a way to mock Abc class successfully in this case?

Tough one - a static initializer block is executed very early, not sure mockito can mock before loading the class... see also https://stackoverflow.com/questions/9130461/when-is-the-static-block-of-a-class-executed — Hulk, Nov 28 '22 at 16:22
I'm afraid you'll have to use heavier tools for this one - e.g. PowerMock. — Hulk, Nov 28 '22 at 16:28
Does this answer your question? [Mocking Static Blocks in Java](https://stackoverflow.com/questions/61150/mocking-static-blocks-in-java) — Hulk, Nov 28 '22 at 16:28
I'm thinking of PowerMock as the second option. Wanted to know if something is possible with mockito first — Karthikeya H S, Nov 29 '22 at 03:06
I solved this without mocking. I initialised my Unit test environment properly with the application context. — Karthikeya H S, Dec 08 '22 at 04:09