Junit: MethodNotFoundException与PowerMock

Question

在运行基于DBUnit的junit测试用例时，我得到以下异常：

java.lang.RuntimeException: Invoking the beforeTestMethod method on PowerMock test listener org.powermock.api.extension.listener.AnnotationEnabler@2a5f1994 failed.
    at org.powermock.tests.utils.impl.PowerMockTestNotifierImpl.notifyBeforeTestMethod(PowerMockTestNotifierImpl.java:92)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:292)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:282)
    at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:84)
    at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:49)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:207)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:146)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:120)
    at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:34)
    at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:44)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:118)
    at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:102)
    at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.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:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: org.powermock.reflect.exceptions.MethodNotFoundException: No method found with name 'assertNoAnnotations' with parameter types: [ java.lang.reflect.Field, [Ljava.lang.Class; ] in class org.powermock.api.mockito.internal.configuration.PowerMockitoInjectingAnnotationEngine.
    at org.powermock.reflect.internal.WhiteboxImpl.throwExceptionIfMethodWasNotFound(WhiteboxImpl.java:1247)
    at org.powermock.reflect.internal.WhiteboxImpl.findMethodOrThrowException(WhiteboxImpl.java:985)
    at org.powermock.reflect.internal.WhiteboxImpl.doInvokeMethod(WhiteboxImpl.java:882)
    at org.powermock.reflect.internal.WhiteboxImpl.invokeMethod(WhiteboxImpl.java:713)
    at org.powermock.reflect.Whitebox.invokeMethod(Whitebox.java:401)
    at org.powermock.api.mockito.internal.configuration.PowerMockitoInjectingAnnotationEngine.process(PowerMockitoInjectingAnnotationEngine.java:45)
    at org.powermock.api.extension.listener.AnnotationEnabler.injectSpiesAndInjectToSetters(AnnotationEnabler.java:55)
    at org.powermock.api.extension.listener.AnnotationEnabler.beforeTestMethod(AnnotationEnabler.java:50)
    at org.powermock.tests.utils.impl.PowerMockTestNotifierImpl.notifyBeforeTestMethod(PowerMockTestNotifierImpl.java:90)
    ... 18 more

我的课看起来像：

@RunWith(PowerMockRunner.class)
public class SampleDbTest extends {

    /** service mock */
    @InjectMocks
    private TestService testService;

    /** entity manager. */
    EntityManager                    entityManager;

    /**
     * Sets the up.
     * 
     * @throws Exception the exception
     */
    @Before
    public final void setUp() throws Exception {
        // get entity manager
        injectField(testService, "entityManager", entityManager);
    }
    ....
    ....

这里，TestService是无状态会话bean接口。我在任何地方都找不到对这个奇怪的例外的解释。如果你有什么想法请告诉我。

谢谢。

Answer 1

我认为您使用了PowerMock和Mockito的不兼容版本。

如果您查看您的堆栈跟踪，您将看到，这个异常是由PowerMockitoInjectingAnnotationEngine抛出的，这个类找不到assertNoAnnotations方法。

最后一个版本的Powermock是1.5.6。因此，现在看看这个类的src，看看PowerMock的旧版本(例如，1.4.12)，您将看到assertNoAnnotations方法的调用已经处理过了。从1.5版本开始，该类不使用此类调用。

最后一个版本的Mockito是1.9.5。现在，如果您查看InjectingAnnotationEngine (由PowerMockitoInjectingAnnotationEngine扩展)的1.9.0版本的1.9.0版本的src，您将看到存在assertNoAnnotations方法持久化。而且，在1.9.5版本中-这个方法已经消失了。

我认为，您将通过更新使用的框架版本来消除此错误。