NoClassDefFoundError for MockitoInvocationHandler class

Question

I am using mockito-all-1.9.5-rc1.jar and powermock-mockito-1.4.12-full.jar. When I run this simple unit test for mocking final method in non-final class.

import static org.junit.Assert.assertEquals;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;

@RunWith(PowerMockRunner.class)
@PrepareForTest(ABC.class)
public class ABCTest {

    @Test
    public void finalCouldBeMock() {
        final ABC abc = PowerMockito.mock(ABC.class);
        PowerMockito.when(abc.myMethod()).thenReturn("toto");
        assertEquals("toto", abc.myMethod());
    }

}

When I ran it, I got java.lang.NoClassDefFoundError: org/mockito/internal/MockitoInvocationHandler Caused by: java.lang.ClassNotFoundException: org.mockito.internal.MockitoInvocationHandler

When I search fo class MockitoInvocationHandler in mockito-all-1.9.5-rc1.jar and powermock-mockito-1.4.12-full.jar. I couldn't find any. Need help with this issue! Thank you

Solution

Mockito 1.9.5-rc1 had to be refactored internally to allow third party mock maker. MockitoInvocationHandler was part of the Mockito's internals (as the package name suggests) up to Mockito 1.9.0.

Due to these changes, current some older version Powermock releases as of today are not compatible with the latest Mockito release.

Another reason to avoid mocking/stubbing finals or statics ;)

Hope that helps Cheers,