如何使用PowerMockito模拟私有方法的任何参数？

Question

public class MyService
{

    …
    private void myMethod(byte[] data, UserFile userFile, User user)
    {

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration({ "classpath:test-context.xml" })
@PrepareForTest(MyServiceImpl.class)
public class MyServiceIT 
{

    @Rule
    public PowerMockRule rule = new PowerMockRule();

    @Autowired
    private MyService m_mySvc;
    private MyService m_mySvcSpy;

    @Before
    public final void setup() throws Exception
    {
        m_mySvcSpy = PowerMockito.spy(m_mySvc);
        PowerMockito.doNothing().when(m_mySvcSpy, “myMethod”, Matchers.any(byte[].class), Matchers.any(UserFile.class), Matchers.any(User.class));

testUploadFile(org.mainco.subco.user.service.MyServiceIT)  Time elapsed: 12.693 sec  <<< ERROR!

使用PowerMockito模拟私有方法的泛型参数的正确方法是什么？

Answer 1

我想您的测试是用SpringJunit4ClassRunner注释的。在这种情况下，您必须使用PowerMockRule:

public class MyServiceTest {
    @Rule
    public PowerMockRule rule = new PowerMockRule();
    ...

此外，您还将MyService方法与PowerMock绑定在一起。因此，必须使用@PrepareforTest注释测试类：

...
@PrepareForTest(MyServiceImpl.class)
public class MyServiceTest {
    ...

完整代码：

@PrepareForTest(MyServiceImpl.class)
@RunWith(SpringJUnit4ClassRunner.class)
public class MyServiceTest {
    @Rule
    public PowerMockRule rule = new PowerMockRule();

    @Autowired
    private MyService service;
    private MyService spy;

    @Before
    public final void setup() throws Exception {
        spy = PowerMockito.spy(service);
        PowerMockito.doNothing().when(spy,
                "myMethod",
                Matchers.any(byte[].class),
                Matchers.any(UserFile.class),
                Matchers.any(User.class));
    }

    ...
}