Question

我正在使用Spring 4.3.8.RELEASE，JUnit 4.12和Mockito 1.10.18。我正在尝试测试我的“publishEvent”方法是否从下面调用...

@Service
@Transactional
public class MyObjectServiceImpl implements MyObjectService, ApplicationEventPublisherAware
{

    private ApplicationEventPublisher publisher;

    @Override
    public void setApplicationEventPublisher(ApplicationEventPublisher publisher) 
    {
        this.publisher = publisher;
    }
    ...
    public void myMethod(MyObject obj) {
    ...
            publisher.publishEvent(new ThirdPartyUpdateUserEvent(userId));
            publisher.publishEvent(new ThirdPartyUpdateObjectEvent(objectId));

然后在我的JUnit测试中我有

@Before
public final void setup()
{
    eventPublisher = Mockito.mock(ApplicationEventPublisher.class);
    ((ApplicationEventPublisherAware) myObjectService).setApplicationEventPublisher(eventPublisher);
    ((ApplicationEventPublisherAware) userService).setApplicationEventPublisher(eventPublisher);
}   // setup

@Test
...
       // Verify first call
    final ArgumentCaptor<ThirdPartyUpdateUserEvent> argument2 = ArgumentCaptor.forClass(ThirdPartyUpdateUserEvent.class);
    Mockito.verify(eventPublisher, Mockito.times(2)).publishEvent(argument2.capture());
    Assert.assertEquals("Failed to call method with proper argument.", userId, argument2.getValue().getUserId());
    // Verify second call
    final ArgumentCaptor<ThirdPartyUpdateMyObjectEvent> argument = ArgumentCaptor.forClass(ThirdPartyUpdateMyObjectEvent.class);
    Mockito.verify(eventPublisher, Mockito.times(2)).publishEvent(argument.capture());
    Assert.assertEquals("Failed to call method with proper argument.", objectId, argument.getValue().getObjectId());

通过调试，我可以看到每个“publishEvent”方法只调用一次，但是当我去验证调用时，我得到@Test中第一个“验证”行的错误

java.lang.ClassCastException: org.mainco.subco.ThirdPartyItem.domain.ThirdPartyUpdateMyObjectEvent cannot be cast to org.mainco.subco.ThirdPartyItem.domain.ThirdPartyUpdateUserEvent
    at com.follett.fdr.lycea.lms.MyObject.test.service.MyObjectServiceDWRTest.testArchiveMyObject(MyObjectServiceDWRTest.java:1234)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

验证对我的模拟发布服务的两次连续调用的正确方法是什么？

Answer 1

而不是为ThirdPartyUpdateUserEvent创建ArgumentCaptor ThirdPartyUpdateMyObjectEvent，为什么不为Object创建一个捕获器：

final ArgumentCaptor<Object> argumentsCaptor = ArgumentCaptor.forClass(Object.class);

或者更好的是，无论是什么常见接口ThirdPartyUpdateUserEvent和ThirdPartyUpdateMyObjectEvent实现（ThirdPartyUpdateEvent？）

现在你可以这样做：

Mockito.verify(eventPublisher, Mockito.times(2)).publishEvent(argumentsCaptor.capture());
List<Object> arguments = argumentsCaptor.getAllValues();
assertTrue(arguments.get(0) instanceof ThirdPartyUpdateUserEvent);
assertTrue(arguments.get(1) instanceof ThirdPartyUpdateMyObjectEvent);

并根据您需要的其他条件测试这些论点。

如何使用mockito在我的JUnit测试中验证对模拟服务的两次连续调用？

1 个答案: