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javajunitmockito

Junit test with Mockito: Error ExceptionInInitializerError

i am getting the following error during junit tests:

 java.lang.ExceptionInInitializerError
    at org.mockito.cglib.core.KeyFactory$Generator.generateClass(KeyFactory.java:167)
    at org.mockito.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
    at org.mockito.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:217)
    at org.mockito.cglib.core.KeyFactory$Generator.create(KeyFactory.java:145)
    at org.mockito.cglib.core.KeyFactory.create(KeyFactory.java:117)
    at org.mockito.cglib.core.KeyFactory.create(KeyFactory.java:109)
    at org.mockito.cglib.core.KeyFactory.create(KeyFactory.java:105)
    at org.mockito.cglib.proxy.Enhancer.<clinit>(Enhancer.java:70)
    at org.mockito.internal.creation.cglib.ClassImposterizer.createProxyClass(ClassImposterizer.java:95)
    at org.mockito.internal.creation.cglib.ClassImposterizer.imposterise(ClassImposterizer.java:57)
    at org.mockito.internal.creation.cglib.ClassImposterizer.imposterise(ClassImposterizer.java:49)
    at org.mockito.internal.creation.cglib.CglibMockMaker.createMock(CglibMockMaker.java:24)
    at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:33)
    at org.mockito.internal.MockitoCore.mock(MockitoCore.java:59)
    at org.mockito.Mockito.mock(Mockito.java:1284)
    at org.mockito.Mockito.mock(Mockito.java:1162)
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @6cc7b4de
    at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
    at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
    at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:199)
    at java.base/java.lang.reflect.Method.setAccessible(Method.java:193)
    at org.mockito.cglib.core.ReflectUtils$2.run(ReflectUtils.java:57)
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:318)
    at org.mockito.cglib.core.ReflectUtils.<clinit>(ReflectUtils.java:47)

I tried debugging the issue but unable to identify the issue as the code is failing in the ResultSet resultSet = Mockito.mock(ResultSet.class) step. How can i resolve the issue. Any suggestion/help is highly appreciated.

Solution

  • As discussed in comments, the problem was caused by pulling outdated version of mockito - 2.0.2-beta from 2015 which is nearly 10 years old.