NoClassDefFoundError org/mockito/cglib/proxy/MethodInterceptor on PowerMock 1.7 using JUnit4/Mockito2 jars

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Karl Koster

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Aug 10, 2017, 12:36:21 PM8/10/17

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I am desperately trying to sort this out. I was delighted to see that PowerMock now supports Mockito2, but I have written a simple test case to verify everything is working and I keep getting the exception above. I have verified that there is no other version of Mockito in the classpath (using the one that came bundled with powermock-mockito2-junit-1.7.0.zip from the powermock page: https://dl.bintray.com/powermock/generic/distributions/powermock-mockito2-junit-1.7.0.zip). The test class looks is follows:


@PrepareForTest({StaticClass.class})
public class Test {
    private static final int INTEREST_ID = 1;

    @Rule
    public PowerMockRule powerMockRule = new PowerMockRule();

    @Mock
    private SomeClass someClass;

    @Before
    public void setup() {
        MockitoAnnotations.initMocks(this);
        PowerMockito.mockStatic(StaticClass.class);
        when(StaticClass.staticMethod()).thenReturn(someClass);
    }

    @Test
    public void verify_static_mock() {

        SomeClass someClass = StaticClass.staticMethod();
        assertThat("The did not find expected object", someClass, equalTo(this.someClass));
    }

}

I get the following stack trace (internal package names elided):

java.lang.IllegalStateException: Could not initialize plugin: interface org.mockito.plugins.MockMaker

	at org.mockito.internal.configuration.plugins.PluginLoader$1.invoke(PluginLoader.java:66)
	at com.sun.proxy.$Proxy12.isTypeMockable(Unknown Source)
	at org.mockito.internal.util.MockUtil.typeMockabilityOf(MockUtil.java:29)
	at org.mockito.internal.util.MockCreationValidator.validateType(MockCreationValidator.java:22)
	at org.mockito.internal.creation.MockSettingsImpl.validatedSettings(MockSettingsImpl.java:186)
	at org.mockito.internal.creation.MockSettingsImpl.confirm(MockSettingsImpl.java:180)
	at org.mockito.internal.MockitoCore.mock(MockitoCore.java:62)
	at org.mockito.Mockito.mock(Mockito.java:1729)
	at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:33)
	at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:16)
	at org.mockito.internal.configuration.IndependentAnnotationEngine.createMockFor(IndependentAnnotationEngine.java:38)
	at org.mockito.internal.configuration.IndependentAnnotationEngine.process(IndependentAnnotationEngine.java:62)
	at org.mockito.internal.configuration.InjectingAnnotationEngine.processIndependentAnnotations(InjectingAnnotationEngine.java:57)
	at org.mockito.internal.configuration.InjectingAnnotationEngine.process(InjectingAnnotationEngine.java:41)
	at org.mockito.MockitoAnnotations.initMocks(MockitoAnnotations.java:69)
	at com....Test.setup(Test.java:59)
	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.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
	at org.powermock.modules.junit4.rule.PowerMockStatement$1.run(PowerMockRule.java:83)
	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:1846)
	at org.powermock.reflect.internal.WhiteboxImpl.doInvokeMethod(WhiteboxImpl.java:810)
	at org.powermock.reflect.internal.WhiteboxImpl.invokeMethod(WhiteboxImpl.java:675)
	at org.powermock.reflect.Whitebox.invokeMethod(Whitebox.java:401)
	at org.powermock.classloading.AbstractClassloaderExecutor.getResult(AbstractClassloaderExecutor.java:76)
	at org.powermock.classloading.AbstractClassloaderExecutor.invokeWithClassLoader(AbstractClassloaderExecutor.java:64)
	at org.powermock.classloading.AbstractClassloaderExecutor.executeWithClassLoader(AbstractClassloaderExecutor.java:56)
	at org.powermock.classloading.SingleClassloaderExecutor.execute(SingleClassloaderExecutor.java:33)
	at org.powermock.classloading.AbstractClassloaderExecutor.execute(AbstractClassloaderExecutor.java:40)
	at org.powermock.modules.junit4.rule.PowerMockStatement.evaluate(PowerMockRule.java:75)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.lang.NoClassDefFoundError: org/mockito/cglib/proxy/MethodInterceptor
	at org.powermock.api.mockito.internal.mockmaker.PowerMockMaker.<init>(PowerMockMaker.java:43)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
	at java.lang.Class.newInstance0(Class.java:357)
	at java.lang.Class.newInstance(Class.java:310)
	at org.mockito.internal.configuration.plugins.PluginLoader.loadImpl(PluginLoader.java:96)
	at org.mockito.internal.configuration.plugins.PluginLoader.loadPlugin(PluginLoader.java:45)
	at org.mockito.internal.configuration.plugins.PluginRegistry.<init>(PluginRegistry.java:18)
	at org.mockito.internal.configuration.plugins.Plugins.<clinit>(Plugins.java:17)
	at org.mockito.internal.configuration.GlobalConfiguration.tryGetPluginAnnotationEngine(GlobalConfiguration.java:55)
	at org.mockito.MockitoAnnotations.initMocks(MockitoAnnotations.java:68)
	... 38 more
Caused by: java.lang.ClassNotFoundException: org.mockito.cglib.proxy.MethodInterceptor
	at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
	at org.powermock.core.classloader.MockClassLoader.loadModifiedClass(MockClassLoader.java:202)
	at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass1(DeferSupportingClassLoader.java:89)
	at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:79)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
	... 51 more

It appears the class org.powermock.api.mockito.internal.mockmaker.PowerMockMaker has an instance of org.powermock.api.mockito.repackaged.CglibMockMaker

which in turn references internal Mockito classes in the package org.mockito.cglib (which don't exist in Mockito2). The PluginLoader successfully loads the PowerMockMaker class,

but when it tries to instantiate it, this exception is thrown.

Is there a work around for this?

Karl Koster

unread,

Aug 10, 2017, 1:17:56 PM8/10/17

to PowerMock

Just a follow up. I tried this using @RunWith(PowerMockRunner) instead of PowerMockRule and it fails at a different point;

java.lang.ClassNotFoundException: org.mockito.exceptions.Reporter

at java.net.URLClassLoader$1.run(URLClassLoader.java:202)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:190)

at java.lang.ClassLoader.loadClass(ClassLoader.java:306)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)

at java.lang.ClassLoader.loadClass(ClassLoader.java:247)

at org.powermock.core.classloader.MockClassLoader.loadModifiedClass(MockClassLoader.java:202)

at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass1(DeferSupportingClassLoader.java:89)

at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:79)

at java.lang.ClassLoader.loadClass(ClassLoader.java:247)

at sun.reflect.GeneratedSerializationConstructorAccessor5.newInstance(Unknown Source)

at java.lang.reflect.Constructor.newInstance(Constructor.java:513)

at org.objenesis.instantiator.sun.SunReflectionFactoryInstantiator.newInstance(SunReflectionFactoryInstantiator.java:48)

at org.powermock.reflect.internal.WhiteboxImpl.newInstance(WhiteboxImpl.java:260)

at org.powermock.reflect.Whitebox.newInstance(Whitebox.java:139)

at org.powermock.api.extension.reporter.AbstractMockingFrameworkReporterFactory.getInstanceForClassLoader(AbstractMockingFrameworkReporterFactory.java:41)

at org.powermock.api.extension.reporter.AbstractMockingFrameworkReporterFactory.create(AbstractMockingFrameworkReporterFactory.java:35)

at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.getMockingFrameworkReporter(JUnit4TestSuiteChunkerImpl.java:140)

at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:119)

at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:57)

at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:59)

at org.junit.runner.JUnitCore.run(JUnitCore.java:137)

at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)

at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)

at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)

at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

Disconnected from the target VM, address: '127.0.0.1:53532', transport: 'socket'

Exception in thread "main" java.lang.NoClassDefFoundError: org/mockito/exceptions/Reporter