public abstract class AbstractClass {
    protected boolean isRendered() {
        System.out.println("### real isRendered() is called");
        return false;
    }
}

public class ImplementationClass extends AbstractClass {}

public class ImplementationClassTest {
    @Tested private ImplementationClass implementationClass;
    @Mocked private AbstractClass mockAbstractClass;

    @Test public void testWillSucceedBecauseIsRenderedIsMockedWithExpectedResultAtAbstractClass() throws Exception {
        new NonStrictExpectations() {{ mockAbstractClass.isRendered(); result = true; }};
        assertThat( implementationClass.isRendered(), is( true ));
    }

    @Test public void testWillSucceedBecauseIsRenderedIsMockedWithExpectedResultAtImplementationClass() throws Exception {
        new NonStrictExpectations( implementationClass ) {{ implementationClass.isRendered(); result = true; }};
        assertThat( implementationClass.isRendered(), is( true ));
    }

    @Test public void testWillUnexpectedlyFailBecauseTheRealIsRenderedIsCalled() throws Exception {
        // just the declaration for the partial mock let the test fail,
        // it is not necessary to record any method calls for the partial mock
        new NonStrictExpectations( implementationClass ) {{ mockAbstractClass.isRendered(); result = true; }};
        assertThat( implementationClass.isRendered(), is( true ));
    }
}