（三）如何做一些测试桩 (Stub)

import org.junit.Test;

import java.util.LinkedList;

import static org.mockito.Mockito.*;



public class MockitoDemo {



    @Test(expected = RuntimeException.class)
    public void when_thenReturn(){
        //You can mock concrete classes, not only interfaces
        // 你可以mock具体的类型,不仅只是接口
        LinkedList mockedList = mock(LinkedList.class);

        //stubbing
        // 测试桩
        when(mockedList.get(0)).thenReturn("first");
        when(mockedList.get(1)).thenThrow(new RuntimeException());

        //following prints "first"
        // 输出“first”
        System.out.println(mockedList.get(0));

        //following throws runtime exception
        // 抛出异常
        System.out.println(mockedList.get(1));

        //following prints "null" because get(999) was not stubbed
        // 因为get(999) 没有打桩，因此输出null
        System.out.println(mockedList.get(999));

        //Although it is possible to verify a stubbed invocation, usually it's just redundant
        //If your code cares what get(0) returns then something else breaks (often before even verify() gets executed).
        //If your code doesn't care what get(0) returns then it should not be stubbed. Not convinced? See here.
        // 验证get(0)被调用的次数
        verify(mockedList).get(0);
    }

}