How to mock super class method using Mockito or anyother relavent java framework

Question

My Scenario is as below

class SuperClass{
   public void run(){
      System.out.println(\"I am running in Super class\");
   }
}

class ChildClass extends S         


        

Answer 1

Ideally, you should "favor composition over inheritance".

If you don't have this option you could use doNothing which basically tells Mockito to do nothing when a method in a mock/spy object is called. This was also discussed here

Following code example should help

@Test
public void tst() {
    ChildClass ch = Mockito.spy(new ChildClass());
    Mockito.doNothing().when((SuperClass)ch).run();
    ch.childRunner();

}

class SuperClass{
    public void run(){
        System.out.println("I am running in Super class");
    }
}

class ChildClass extends SuperClass{
    public void childRunner(){
        System.out.println("Step 1");
        run();
        System.out.println("Last Step");
    }
}

output:

Step 1
Last Step

In case you use super.run(); this won't work