java - 如何使用mockito/powermockito模拟IamRequest impl类？

Question

IamRequestImpl.java

public class IamRequestImpl<E> extends IamRequest {
    public IamRequestImpl(Iam iam, String s, String s1, Object o, Class aClass) {
        super(iam, s, s1, o, aClass);
    }
}

GcsHelper.java

public <T> T getServiceAccountKey(IamRequestInitializer req, Iam iam, String requestString,
            String api) throws IOException {
        IamRequestImpl<String> iamRequestImpl= new IamRequestImpl<String>(iam, HttpMethods.POST, requestString, String.class,
                ServiceAccountKey.class);
        iamRequestImpl.setKey(api);
        iamRequestImpl.setFields(SchedulerConstants.JSON_KEY_FIELDS);
        req.initializeJsonRequest(iamRequestImpl);
        return (T) request.execute();
    }

GCSHelperTest.java

@RunWith(PowerMockRunner.class)
@PrepareForTest({ IamRequestImpl.class, ServiceAccountKey.class})
@Test
    public void testGetServiceAccountKeyOnSuccess() throws Exception{
        IamRequestInitializer mockIamRequestInitializer = Mockito.mock(IamRequestInitializer.class);
        IamRequestImpl<String> mockIamRequestImpl = PowerMockito.mock(IamRequestImpl.class);
        PowerMockito.whenNew(IamRequestImpl.class).withAnyArguments().thenReturn(mockIamRequestImpl);
        when(mockIamRequestImpl.setKey("apiKey")).thenReturn(mockIamRequestImpl);
        when(mockIamRequestImpl.setFields("apiKey")).thenReturn(mockIamRequestImpl);
        Mockito.doNothing().when(mockIamRequestInitializer).initializeJsonRequest(mockIamRequestImpl);
        spyGCSUtils.getServiceAccountKey(Mockito.any(), Mockito.any(), Mockito.any(), Mockito.any());
    }

运行 testGetServiceAccountKeyOnSuccess 测试用例时，面临 nullpointerException，因为 iamRequestImpl 不是模拟。

Answer 1

尝试将 Mockito.any() 转换为特定的对象，如下所示。

spyGCSUtils.getServiceAccountKey((IamRequestInitializer)Mockito.any(), (Iam)Mockito.any(), Mockito.anyString(), Mockito.anyString());

自getServiceAccountKey(IamRequestInitializer, Iam, String, String)