如何使用Powermock验证内部方法调用？

Question

我试图通过验证内部audit（）方法调用来使用PowerMockito来测试保存方法。此内部调用由auditor对象生成，该对象在类的init（）方法中实例化。由于它没有注入，我将无法直接模拟它。当我使用Mockito来验证它总是说“与模拟没有任何交互”。问题：我究竟如何测试保存功能？请帮忙！

public class DaoImpl implements Dao{
private Auditor auditor;

@InjectValue
private ObjectLoader loader;

@InjectValue
private ConfigurationProvider confProvider;

@PostConstruct
public void init() {
    //Mock this object instantiation and verify audit is called once
    auditor = new SyncAuditor(confProvider.getClientConfiguration(), new EventRegProvider());
}

@Override
public void save(final AuditEvt auditEvt) {
  final AuditedEvent auditedEvent = builder.build();
  auditor.audit(auditedEvent); 
 }

测试：

@RunWith(PowerMockRunner.class)
@PrepareForTest({ DaoImplTest.class })
@PowerMockIgnore("javax.management.*")
public class DaoImplTest extends PowerMockito {

@InjectMocks
private DaoImpl dataAccess;

@Mock
private SynchAuditor auditorMock;
 @Before
public void setUp() throws Exception {
    loader = ObjectLoader.init("JUNIT");
    loader.bind(ConfigurationProvider.class, configurationProviderMock);
    dataAccess = loader.newInstance(DaoImpl.class);
}

@After
public void tearDown() {
    loader.release(dataAccess);
    ConnectionMgr.disconnect("JUNIT");
}

@Test
public void testSaveAuditEvent() throws Exception { 
     PowerMockito.whenNew(SynchAuditor.class).
     withArguments(Matchers.any(ClientConfiguration.class), Matchers.any(EventRegProvider.class)).thenReturn(this.auditorMock);
     final AuditEvent event = AuditEvent.from(null, "principal", UUID.randomUUID().toString(), "randomText",
            new AuditEvtDefn((long) 522, "234242", "234242fdgd", true), SUCCESS, null, new GregorianCalendar());
     dataAccess.save(event);
     Mockito.verify(auditorMock, times(1)).audit(Matchers.any(AuditedEvent.class));
}

甚至PowerMockito.verifyNew表示PowerMockito.verifyNew(SynchronousAuditor.class,times(1)).withArguments(Matchers.any(AuditorClientConfiguration.class),Matchers.any(EventRegistrationProvider.class));没有互动

Answer 1

所以，我发现java反射会在这种情况下有所帮助。您将不得不抓住真实对象，然后将模拟对象设置为它。

final Field privateAuditorField = DaoImpl.class.getDeclaredField("auditor");
privateAuditorField.setAccessible(true);
privateAuditorField.set(dataAccess, auditorMock);

现在验证将成功运行。

Mockito.verify(auditorMock, Mockito.times(1)).audit(Matchers.any(AuditedEvent.class));