Java mocks-如何验证调用了私有方法

我正在尝试模拟私有方法并验证它是否已执行。
模拟本身工作正常，也就是说，无论我是否注释/取消注释“when”行，我都会得到正确的结果。然而，我在验证方面遇到了困难

@RunWith(PowerMockRunner.class)
@PrepareForTest(ClassToTest.class)
public class TestClass {

    @Test
    public void test() throws Exception {
        ClassToTest spy = PowerMockito.spy(new ClassToTest());
        when(spy, method(ClassToTest.class, "privMethod", int.class)).withArguments(anyInt()).thenReturn(20);
        System.out.println(spy.pubMethod());
        PowerMockito.verifyPrivate(spy, times(1)).invoke("privMethod", int.class);
    }
}

class ClassToTest {

    public int pubMethod() {
        return privMethod(231);
    }

    private int privMethod(int whatever) {
        return 10;
    }
}

创建此示例基于 这就是我得到的，知道为什么吗

java.lang.IllegalArgumentException: argument type mismatch
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.powermock.reflect.internal.WhiteboxImpl.performMethodInvocation(WhiteboxImpl.java:1873)
    at org.powermock.reflect.internal.WhiteboxImpl.doInvokeMethod(WhiteboxImpl.java:773)
    at org.powermock.reflect.internal.WhiteboxImpl.invokeMethod(WhiteboxImpl.java:638)
    at org.powermock.reflect.Whitebox.invokeMethod(Whitebox.java:401)
    at org.powermock.api.mockito.internal.verification.DefaultPrivateMethodVerification.invoke(DefaultPrivateMethodVerification.java:39)
    at test.TestClass.test(TestClass.java:24)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:69)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:310)
    at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:89)
    at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:96)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:294)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:128)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:82)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:283)
    at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:91)
    at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:49)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:208)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:146)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:121)
    at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:34)
    at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:45)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:123)
    at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:104)
    at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:53)
    at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:53)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:684)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:391)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

---

验证参数值

231

，而不是

int.class

。模拟验证通过匹配值而不是类型来工作（除非在

部分中使用参数匹配器）。
如果要测试
ClassToTest
，为什么要模拟它？您应该模拟
ClassToTest
的依赖项。这就是重点。@Jon Skeet我想OP只是在学习PowerMockito机制。这个例子就是这样的。@Ray:可能。。。但对我来说，这仍然像是对嘲笑的滥用。“啊，好吧！”乔恩·斯基特：这怎么会滥用嘲弄呢。私有方法使用了一些在Junit环境中不起作用的第三方代码，除了模拟之外，我该如何测试它？@Łukasz：您通常会单独使用该依赖项，因此您可以模拟（或伪造）依赖项，而不是模拟私有方法，这是一个实现细节。在不知道所讨论的第三方库或您正在使用它做什么的情况下，很难给出更具体的信息，但实际上您希望使代码和第三方代码之间的“接缝”更容易重放。当然，这只是我的观点——但我更愿意注入一个虚假的依赖性实现，而不是模拟私有方法，留下一个脆弱的测试。不过，当我将时间（1）更改为我得到的任何其他值时，测试现在通过了：org.powermock.reflect.exceptions.TooManyFieldsFoundException:两个或多个匹配java.lang.String类型的字段。这似乎并不反映预期呼叫的无效数量。