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准备

书写MyList类

package com.github.shoothzj.mockito;

import java.util.AbstractList;

public class MyList extends AbstractList {

    @Override
    public String get(final int index) {
        return null;
    }
    @Override
    public int size() {
        return 0;
    }

    final public int finalMethod() {
        return 0;
    }

}

书写FinalList，我们接下来书写一个Final类，继承MyList

public final class FinalList extends MyList {

    @Override
    public int size() {
        return 1;
    }
}

配置Mockito支持Final方法和Final类

在src/test/resources/mockito-extensions中添加名为org.mockito.plugins.MockMaker的文件，内容为

mock-maker-inline

mock final方法

package com.github.shoothzj.mockito;

import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import org.mockito.Mockito;

class MyListTest {

    @Test
    public void testMockFinalMethod() {
        MyList myList = new MyList();
        MyList mock = Mockito.mock(MyList.class);
        Mockito.when(mock.finalMethod()).thenReturn(1);

        Assertions.assertNotEquals(mock.finalMethod(), myList.finalMethod());
    }

}

mock final类

package com.github.shoothzj.mockito;

import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import org.mockito.Mockito;

class FinalListTest {

    @Test
    public void testMockFinalClass() {
        FinalList finalList = new FinalList();

        FinalList mock = Mockito.mock(FinalList.class);
        Mockito.when(mock.size()).thenReturn(2);

        Assertions.assertNotEquals(mock.size(), finalList.size());
    }

}