Junit的：MethodNotFoundException与PowerMock

Question

在运行基于DBUnit的JUnit测试情况下，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 

我班的样子：

@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的是无状态会话Bean接口。我无法在这个奇怪的例外的任何地方找到任何解释。请让我知道，如果你有任何想法。

谢谢。

Answer 1

我认为你使用PowerMock和Mockito的不兼容版本。

如果你看看你的stacktrack，你会发现，这个异常是由PowerMockitoInjectingAnnotationEngine抛出的，而这个类找不到assertNoAnnotations的方法。

最后一个Powermock版本是1.5.6。所以，现在看看这个类的src中的旧版PowerMock（例如1.4.12），你会看到，有调用assertNoAnnotations方法处理。从1.5版本开始，此类不使用此类调用。

最后一个版本的Mockito是1.9.5。现在，如果你看（它被PowerMockitoInjectingAnnotationEngine扩展）的src为1.9.0版本的Mockito，你会看到，有assertNoAnnotations方法存在。并且，在1.9.5版本中 - 此方法消失。

我想，你会通过更新你使用的框架版本来摆脱这个错误。