Mockito Spy 调用被监视类的实际方法，而不是返回硬编码的模拟

这是我的间谍声明

OAuthService oAuthServiceMock = Mockito.mock(OAuthService.class);
     Mockito.doReturn(oAuthServiceMock).when(inviteServiceSpy.buildOAuthService(RESOURCE_URL, CONSUMER_KEY, CONSUMER_SECRET));

这是实际类中的方法

  public OAuthService buildOAuthService(String RESOURCE_URL, String CONSUMER_KEY, String CONSUMER_SECRET) {
        return new ServiceBuilder()
                .provider(new DummyOAuth1ApiProvider(RESOURCE_URL))
                .apiKey(CONSUMER_KEY)
                .apiSecret(CONSUMER_SECRET)
                .signatureType(SignatureType.Header).debug().build();
    }

这是我的测试用例的片段和实际间谍类的实例化（包含上述方法） 设置：

//This is in Setup/@Before method
myServiceSpy = Mockito.spy(new myServiceImpl());

测试用例：

 @Test
    public void testGetmyInviteData() throws Exception {
       assertNotNull(myServiceSpy.getmyInviteData(signup_token,CONSUMER_KEY,CONSUMER_SECRET,RESOURCE_URL, RESOURCE_URL));
    }

问题在于，间谍程序没有返回模拟对象，而是实际调用的方法似乎抛出了空指针异常。这是我运行此测试时遇到的异常。关于我可能做错了什么以及如何改进并避免调用实际方法有什么想法吗？

java.lang.NullPointerException
    at org.mycompany.myapp.service.MyServiceImplTest.testGetMyInviteData(MyServiceImplTest.java:143)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
    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:74)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:88)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:78)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:212)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)

您的模拟陈述不正确。它应该是 http://docs.mockito.googlecode.com/hg/org/mockito/Mockito.html#12:

doReturn(oAuthServiceMock).when(inviteServiceSpy).buildOAuthService(RESOURCE_URL, CONSUMER_KEY, CONSUMER_SECRET);

您的代码中发生的情况是buildOAuthService真的被调用了，这会导致你的异常。