Unexpected error (Mockito can only mock non-private & non-final classes.) in version 2.24.0

Hi,

Since version 2.24.0 I got the error “Mockito can only mock non-private & non-final classes.”. Reverting back to Mockito 2.23.4 resolves the problem.

Stacktrace Underlying exception : java.lang.IllegalArgumentException: Could not create type at nl.tkp.ddw.pensioenaangifte.test.model.unittesten.AanleveringFilteringStepDefinitions.setup(AanleveringFilteringStepDefinitions.java:43) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at cucumber.runtime.Utils$1.call(Utils.java:26) at cucumber.runtime.Timeout.timeout(Timeout.java:16) at cucumber.runtime.Utils.invoke(Utils.java:20) at cucumber.runtime.java.JavaHookDefinition.execute(JavaHookDefinition.java:60) at cucumber.runner.HookDefinitionMatch.runStep(HookDefinitionMatch.java:16) at cucumber.runner.TestStep.executeStep(TestStep.java:63) at cucumber.runner.TestStep.run(TestStep.java:49) at cucumber.runner.TestCase.run(TestCase.java:40) at cucumber.runner.Runner.runPickle(Runner.java:40) at cucumber.runtime.junit.PickleRunners$NoStepDescriptions.run(PickleRunners.java:146) at cucumber.runtime.junit.FeatureRunner.runChild(FeatureRunner.java:68) at cucumber.runtime.junit.FeatureRunner.runChild(FeatureRunner.java:23) 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 cucumber.runtime.junit.FeatureRunner.run(FeatureRunner.java:73) at cucumber.api.junit.Cucumber.runChild(Cucumber.java:124) at cucumber.api.junit.Cucumber.runChild(Cucumber.java:65) 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 cucumber.api.junit.Cucumber$1.evaluate(Cucumber.java:133) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:110) at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:58) at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:38) at org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:62) at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24) at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32) at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93) at com.sun.proxy.$Proxy2.processTestClass(Unknown Source) at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:118) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24) at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:175) at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:157) at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:404) at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63) at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.IllegalArgumentException: Could not create type at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:154) at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:365) at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:174) at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:376) at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.mockClass(TypeCachingBytecodeGenerator.java:32) at org.mockito.internal.creation.bytebuddy.SubclassByteBuddyMockMaker.createMockType(SubclassByteBuddyMockMaker.java:71) at org.mockito.internal.creation.bytebuddy.SubclassByteBuddyMockMaker.createMock(SubclassByteBuddyMockMaker.java:42) at org.mockito.internal.creation.bytebuddy.ByteBuddyMockMaker.createMock(ByteBuddyMockMaker.java:25) at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:35) at org.mockito.internal.MockitoCore.mock(MockitoCore.java:62) at org.mockito.Mockito.mock(Mockito.java:1896) at org.mockito.internal.configuration.MockAnnotationProcessor.processAnnotationForMock(MockAnnotationProcessor.java:44) at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:19) at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:16) at org.mockito.internal.configuration.IndependentAnnotationEngine.createMockFor(IndependentAnnotationEngine.java:38) at org.mockito.internal.configuration.IndependentAnnotationEngine.process(IndependentAnnotationEngine.java:62) at org.mockito.internal.configuration.InjectingAnnotationEngine.processIndependentAnnotations(InjectingAnnotationEngine.java:49) at org.mockito.internal.configuration.InjectingAnnotationEngine.process(InjectingAnnotationEngine.java:41) at org.mockito.MockitoAnnotations.initMocks(MockitoAnnotations.java:69) ... 63 more Caused by: java.lang.NoSuchMethodError: net.bytebuddy.dynamic.loading.MultipleParentClassLoader$Builder.appendMostSpecific(Ljava/util/Collection;)Lnet/bytebuddy/dynamic/loading/MultipleParentClassLoader$Builder; at org.mockito.internal.creation.bytebuddy.SubclassBytecodeGenerator.mockClass(SubclassBytecodeGenerator.java:83) at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator$1.call(TypeCachingBytecodeGenerator.java:37) at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator$1.call(TypeCachingBytecodeGenerator.java:34) at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:152) ... 81 more

Versioninfo Java: 1.8 JVM vendor name: Oracle Corporation JVM vendor version: 25.191-b12 JVM name: Java HotSpot™ 64-Bit Server VM JVM version: 1.8.0_191-b12 JVM info: mixed mode OS name: Mac OS X OS version: 10.13.6 Mockito-core: 2.24.0

[frankvanderkuur]

Since quite some people have the same issue, i’ve reopened the issue.

[taher435]

I am also getting the same error. Reverting back to 2.23.+ fixes the issue.