java - 如何使用 Mockito/Powermockito 在内部类中对逻辑进行单元测试

Question

我有以下类(class)要测试。

public class ClassToTest {

    private View view;

    public ClassToTest(View view) {
        this.view = view;
    }

    public void init() {
        view.add(new ParamClass.OnSomething() {
            @Override
            public void onSomethingElse() {
                view.doSomeWork();
            }
        });
    }
}

View 在哪里

public class View {
    public void add(OnSomething onSomething) {
    }

    public void doSomeWork() {
    }
}

我已经模拟了 View 对象，但不知道如何测试标记为“此处要测试的一些逻辑”的逻辑

ParamClass 是最终的。

public final class ParamClass {

  public interface onSomething {
    public void onSomethingElse();
  }
}

在不更改源代码的情况下，有没有办法使用 Mockito/Powermockito 对其进行单元测试？

我正在尝试验证 doSomeWork() 的调用

@RunWith(PowerMockRunner.class)
@PrepareForTest({ ClassToTest.class })
public class TestClass {

    @Mock View view;

    @Before
    public void init() {
        MockitoAnnotations.initMocks(this);
    }

    @Test
    public void test() throws Exception {
        ClassToTest classToTest = new ClassToTest(view);
        PowerMockito.doCallRealMethod().when(view).add(Mockito.any(ParamClass.OnSomething.class));
        PowerMockito.whenNew(ParamClass.OnSomething.class)
                .withAnyArguments()
                .thenReturn(new ParamClass.OnSomething() {
                    @Override
                    public void onSomethingElse() {
                        view.doSomeWork();
                    }
                });
        classToTest.init();
        Mockito.verify(view, Mockito.times(1)).doSomeWork();
    }
}

抛出异常

java.lang.ArrayIndexOutOfBoundsException: 0

at org.powermock.api.mockito.internal.expectation.DefaultConstructorExpectationSetup.withAnyArguments(DefaultConstructorExpectationSetup.java:66)
at com.linkedin.android.lite.animations.TestClass.test(TestClass.java:29)

Answer 1

我知道怎么做了。更新答案。

public class TestClass {

    @Mock View view;

    @Before
    public void init() {
        MockitoAnnotations.initMocks(this);
    }

    @Test
    public void test() throws Exception {
        ClassToTest classToTest = new ClassToTest(view);
        classToTest.init();
        ArgumentCaptor<ParamClass.OnSomething> captor =
        ArgumentCaptor.forClass(ParamClass.OnSomething.class);
        verify(view).add(captor.capture());
        ParamClass.OnSomething onSomething = captor.getValue();
        onSomething.onSomethingElse();
        Mockito.verify(view, Mockito.times(1)).doSomeWork();
    }
}