当使用父类方法调用公共静态内部类方法时，Power Mock给出null

Question

public abstract interface ABC extends KObject{
    public abstract XYZ addNewXYZ();
    public static final class Factory {
        public static ABC newInstance() {
            // Returns new instance for 
        }
    }
    public static abstract interface XYZ extends KObject {
        public abstract XYZ getBase();
        }
    }
}



In the calling method I am using


 clientMethod(){
    ABC  abcObj=ABC.Factory.newInstance();
    XYZ  xyz = abcObj.addNewXYZ().getBase();
    //xyz is returning null here when run junit using power mock.
}


testClientByPowermock(){ 
//tried many ways no luck

} 

我试图在电力模拟中运行的方式。

使用了两种注释

@RunWith(PowerMockRunner.class)
@PrepareForTest(

有人可以帮助我如何运行这样的内部课程，提前谢谢。