mockito.verify() 给出了错误的调用计数

Question

我正在尝试

mockito.verify()

功能。该方法调用仅发生一次，但验证显示 3 次调用。单元测试只有一个测试，以确保该测试不会受到其他影响。

Mockito.verify(utilClass, Mockito.times(1)).hello(); /// but invocation is 3 times, says the error

我一直在查看日志，它也显示调用仅发生一次。多次添加故意调用方法

utilClass.hello()

，然后显示正确的调用次数。但在给定的代码中，它被调用一次，它出现为被调用 3 次。

待测班级：

@Component
public class UtilClass {
    
    private static final Logger logger =  LoggerFactory.getLogger(UtilClass.class);

    public String hello() {
        logger.info("hello method invoked");
        return "Hello World,"+ hi();
    }
    
    private String hi() {
        logger.info("hi method invoked");
        return "Hi All";
    }
}
@Component
public class ClassWithDependency {

    @Autowired
    private UtilClass utilClass;

    public String welcome() {
        String msg = utilClass.hello();
        return msg;
    }

}

测试用例

@InjectMocks
private ClassWithDependency classWithDependency;

@Mock
private UtilClass utilClass;

@Before
public void init() throws Exception {
        PowerMockito.when(utilClass,"hi").thenReturn("Hi Java");
        PowerMockito.when(utilClass.hello()).thenCallRealMethod();
    }


    @Test
    public void testMock() throws Exception {
        final String msg = classWithDependency.welcome();
        
        final String msgExpected = "Hello World,Hi Java";
        logger.info("welcome method called:{}",msg);
        
        PowerMockito.verifyPrivate(utilClass, Mockito.times(1)).invoke("hi");
        Mockito.verify(utilClass, Mockito.times(1)).hello();
        
        Assert.assertTrue(msg.equals(msgExpected));
    }

我期待mockito.verify 成功，但收到此错误：

org.mockito.exceptions.verification.TooManyActualInvocations: 
utilClass.hello();
Wanted 1 time:
-> at com.sd.demo.powermock.test.injectmock.InjectMockTest.testMock(InjectMockTest.java:54)
But was 3 times:
-> at com.sd.demo.powermock.injectmock.ClassWithDependency.welcome(ClassWithDependency.java:13)
-> at com.sd.demo.powermock.injectmock.ClassWithDependency.welcome(ClassWithDependency.java:13)
-> at com.sd.demo.powermock.injectmock.ClassWithDependency.welcome(ClassWithDependency.java:13)
    at com.sd.demo.powermock.test.injectmock.InjectMockTest.testMock(InjectMockTest.java:54)
    at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:68)
    at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:89)
.............

Answer 1

最后让测试工作，解决方案是'SPY'..监视util类，这样就不会告诉真正调用哪个方法。我不知道如何注入间谍，所以使用了 setter..

@InjectMocks 私有 ClassWithDependency classWithDependency;

private UtilClass mockUtil;

@Before
public void init() throws Exception {
    UtilClass utilClass = new UtilClass();
    mockUtil = PowerMockito.spy(utilClass);
    classWithDependency.setUtilClass(mockUtil); 
}

@Test
public void testMock() throws Exception {
    PowerMockito.when(mockUtil,"hi").thenReturn("Hi Java"); 
    final String msg = classWithDependency.welcome();
    final String msgExpected = "Hello World,Hi Java";
    logger.info("welcome method called:{}",msg);
    PowerMockito.verifyPrivate(mockUtil, Mockito.times(1)).invoke("hi");
    Mockito.verify(mockUtil, Mockito.times(1)).hello();
    Assert.assertTrue(msg.equals(msgExpected));
}