Junit 在没有PowerMock的情况下模拟类内的对象

我想用Powermock模拟类中的对象。我怎么做

我试着用间谍，但没用

/** SOURCE CODE **/
abstract class Parent {
    protected final Caller caller = new Caller();
    public abstract void call(Connection, Integer);
}

class Child1 extends Parent {

    @Override
    public void call(Connection con, Integer id1) {
        // some logic
        caller.getSomething1(connection, id1);
    }
}

class Child2 extends Parent {

    @Override
    public void call(Connection con, Integer id2) {
        // some logic
        caller.getSomething2(connection, id2);
    }
}

class Activity {

     @Inject
     private MyConnection connection;

     public Response process(Request r) {
           Parent p = ChildFactory.getChild(r); // returns a child based on some logic related to p
           p.call(connection, r.getId());
           return new Response("SUCCESS");
     }
}

/** TEST CODE **/

public class Test {

    @InjectMocks
    private Activity activity;

    @Mock
    private Connection connectionMock;

    private Caller caller;

    @Before
    public void setup() throws Exception {
         caller = Mockito.spy(Caller.class);
Mockito.doReturn(null).when(caller).getSomething1(Mockito.any(), Mockito.any());
Mockito.doReturn(null).when(caller).getSomething2(Mockito.any(), Mockito.any());
    }

    @Test
    public void testProcess() {
        Request r = new Request(1);
        Response r = activity.process(r);
        Assert.assertEquals(r.getResult(), "SUCCESS"); 
    }
}

我想模拟在父类中创建的调用方对象。它将被每个孩子所消费。我不担心调用的结果，所以我想模拟所有调用，即不使用PowerMock的调用方的getSomething1、getSomething2

我尝试使用spy，但它没有使用spied对象，它正在调用getSomething1和getSomething2方法。

您可以使用

---

或者最好不要在子类中实例化调用方实例，而是通过构造函数进行注入，例如

您可以执行小型重构吗？或者您的绑定，因为它正在父级中实例化。我错过什么了吗？

@Before
public void setup() throws Exception {
     caller = Mockito.spy(Caller.class);
     Mockito.doReturn(null).when(caller).getSomething1(Mockito.any(), Mockito.any());
     Mockito.doReturn(null).when(caller).getSomething2(Mockito.any(), Mockito.any());

     // ... obtain children here ...

     ReflectionTestUtils.setField(child1, "caller", caller);
     ReflectionTestUtils.setField(child2, "caller", caller);
}