How to mock super reference (on super class)?

问题

Sometimes when I write unit tests I should to mock reference to superclass.

I have read this question: question

This answer answer with DI advice to refactor code. But I cannot it

this answer another answer is not suitable if superclass method is enough big. In my case I have very big code. Yes I know that it is brokes SOLID OOD principes but I just should to write test. I have not enough time for refactor.

said question was asked 4 years ago!

Does currently Mockito or Powermock can resolve this issue ?

update

code example:

class BaseService {  
    public void save() {
      // a lot of code here! I cannot change this code.
    }  
}

public Childservice extends BaseService {  
    public void save(){  
        //logic for testing
        super.save();
       //logic for testing
    }  
}

update 2

public class Parent {
    public int save() {
         return 99;
    }   
}

public class Child extends Parent {
    public int save() {
        int i = super.save();
        return i*2;
    }
}

and test:

@RunWith(PowerMockRunner.class)
@PrepareForTest(Parent.class)
public class ParentTest {
    @Test
    public void testSave() {       
        PowerMockito.suppress(PowerMockito.methodsDeclaredIn(Parent.class));        
        System.out.println(new Child().save());
    }
}

output: 198

回答1:

With Powermock you can replace or suppress methods, so it is possible to change the action done by BaseService.save(). You can also make methods to do nothing with suppressing. You can even suppress static initializer blocks.

Please read this blog entry of the Powermock authors. See chapter "Replacing".

UPDATE:

Suppress seems to work for me, but replace not. See the picture below:

回答2:

This is impossible; the whole point of a superclass is that it encapsulates upstream state and functionality, and the class hierarchy is hard-coded in your subclass based on the extends relationship.

来源：https://stackoverflow.com/questions/23865555/how-to-mock-super-reference-on-super-class

标签

java

unit-testing

mocking

super

powermock