JMockIt ha esito negativo con AgentInitializationException: JAR dell'agente caricato ma l'inizializzazione dell'agente non è riuscita

Question

Sto sviluppando un plug-in per Eclipse Kepler. L'aggiunta di @RunWith (JMockit.class) per la mia classe di test causa il seguente errore:

JMockit: Reinitializing under custom class loader org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@b7ccec1[com.mypackage.myclass:2.3.9.201508161221(id=1)] 
java.lang.reflect.InvocationTargetException 
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
     at java.lang.reflect.Method.invoke(Method.java:606) 
     at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:382) 
     at sun.instrument.InstrumentationImpl.loadClassAndCallAgentmain(InstrumentationImpl.java:407) 
Caused by: java.lang.VerifyError 
     at sun.instrument.InstrumentationImpl.redefineClasses0(Native Method) 
     at sun.instrument.InstrumentationImpl.redefineClasses(InstrumentationImpl.java:170) 
     at mockit.internal.startup.Startup.redefineMethods(Startup.java:242) 
     at mockit.internal.startup.Startup.redefineMethods(Startup.java:236) 
     at mockit.internal.mockups.MockClassSetup.applyClassModifications(MockClassSetup.java:134) 
     at mockit.internal.mockups.MockClassSetup.redefineMethodsInClassHierarchy(MockClassSetup.java:91) 
     at mockit.internal.mockups.MockClassSetup.redefineMethods(MockClassSetup.java:76) 
     at mockit.MockUp.redefineMethods(MockUp.java:240) 
     at mockit.MockUp.redefineClassOrImplementInterface(MockUp.java:222) 
     at mockit.MockUp.<init>(MockUp.java:131) 
     at mockit.integration.junit4.internal.RunNotifierDecorator.<init>(RunNotifierDecorator.java:21) 
     at mockit.internal.startup.JMockitInitialization.loadInternalStartupMocksForJUnitIntegration(JMockitInitialization.java:42) 
     at mockit.internal.startup.JMockitInitialization.initialize(JMockitInitialization.java:27) 
     at mockit.internal.startup.Startup.applyStartupMocks(Startup.java:72) 
     at mockit.internal.startup.Startup.reapplyStartupMocks(Startup.java:124) 
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
     at java.lang.reflect.Method.invoke(Method.java:606) 
     at mockit.internal.util.MethodReflection.invoke(MethodReflection.java:94) 
     at mockit.internal.util.MethodReflection.invoke(MethodReflection.java:159) 
     at mockit.internal.startup.Startup.reinitializeJMockitUnderCustomClassLoader(Startup.java:118) 
     at mockit.internal.startup.Startup.agentmain(Startup.java:101) 
     ... 6 more 
java.lang.IllegalStateException: com.sun.tools.attach.AgentInitializationException: Agent JAR loaded but agent failed to initialize 
     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
     at java.lang.reflect.Constructor.newInstance(Constructor.java:526) 
     at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:262) 
     at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:153) 
     at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:124) 
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:606) 
     at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray2(ReflectionUtils.java:208) 
     at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:156) 
     at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:82) 
     at org.eclipse.tycho.surefire.osgibooter.OsgiSurefireBooter.run(OsgiSurefireBooter.java:91) 
     at org.eclipse.tycho.surefire.osgibooter.AbstractUITestApplication$1.run(AbstractUITestApplication.java:35) 
     at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) 
     at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135) 
     at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4145) 
     at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3762) 
     at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1113) 
     at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) 
     at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:997) 
     at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:140) 
     at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:611) 
     at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) 
     at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:567) 
     at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150) 
     at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124) 
     at org.eclipse.tycho.surefire.osgibooter.UITestApplication.runApplication(UITestApplication.java:31) 
     at org.eclipse.tycho.surefire.osgibooter.AbstractUITestApplication.run(AbstractUITestApplication.java:120) 
     at org.eclipse.tycho.surefire.osgibooter.UITestApplication.start(UITestApplication.java:37) 
     at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) 
     at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) 
     at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) 
     at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:354) 
     at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181) 
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:606) 
     at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:636) 
     at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591) 
     at org.eclipse.equinox.launcher.Main.run(Main.java:1450) 
     at org.eclipse.equinox.launcher.Main.main(Main.java:1426) 
Caused by: com.sun.tools.attach.AgentInitializationException: Agent JAR loaded but agent failed to initialize 
     ... 39 more 

sto facendo qualcosa di sbagliato o si tratta di un bug JMockit? Sto usando la versione JMockIt 1.18, JUnit 4.12

Answer 1

Mi sarei aspettato che @RunWith(JMockit.class) si sarebbe dovuto occupare di questo problema.

In ogni caso, dall'esercitazione di JMockit here, ci sono alcune note da controllare, nel caso in cui queste risolvano il problema. In particolare, questi due sembrano essere più rilevanti:

• (Note for Eclipse users: when specifying the order of jars in the >classpath, make sure to use the "Order and Export" tab of the "Java Build >Path" window. Also, make sure the Eclipse project uses the JRE from a JDK >installation instead of a "plain" JRE, since the latter lacks the >"attach" native library.)
• In other situations (like running on JDK implementations other than >the Oracle JDKs), you may need to pass "-javaagent:path>/jmockit.jar" as a JVM initialization parameter. This can be done in >the "Run/Debug Configuration" for both Eclipse and IntelliJ IDEA, or with >build tools such as Ant and Maven.

Answer 2

clic destro del progetto in Package Explorer

click Properties. go to Java Build Path. Libraries tab. click on 'Add Library' button select JUnit click Next. You should be able to handle it from there.

Dopo di che, se si utilizza la copertura come: si sarà in grado di vedere la copertura.