该系列文章翻译自https://www.baeldung.com/mockito-series

我们为MyList类增加了一个final方法，并且扩展了一个final类，如下：

public class MyList extends AbstractList {
    final public int finalMethod() {
        return 0;
    }
}

public final class FinalList extends MyList {
 
    @Override
    public int size() {
        return 1;
    }
}

1. 配置

为了让Mockito能够模拟final类和方法，需要做额外的配置。我们需要在项目的src/test/resources/mockito-extensions 目录下添加文件org.mockito.plugins.MockMaker,并在文件中添加一行

mock-maker-inline

image.png

2. 模拟final方法

@Test
public void whenMockFinalMethodMockWorks() {
 
    MyList myList = new MyList();
 
    MyList mock = mock(MyList.class);
    when(mock.finalMethod()).thenReturn(1);
 
    assertNotEquals(mock.finalMethod(), myList.finalMethod());
}

3. 模拟final类

@Test
public void whenMockFinalClassMockWorks() {
 
    FinalList finalList = new FinalList();
 
    FinalList mock = mock(FinalList.class);
    when(mock.size()).thenReturn(2);
 
    assertNotEquals(mock.size(), finalList.size());
}