单元测试-mock基础

本文较短，只是备份一下mock的几个常用基础例子方便复习

目录

介绍mock的使用例子

maven资源

        <dependency>
            <groupId>org.mockito</groupId>
            <artifactId>mockito-all</artifactId>
            <version>1.8.5</version>
        </dependency>

1 mock一个对象

annotation

@Mock private TestOpt tt;

静态方法调用

List mockedList = Mockito.mock(ArrayList.class);

2 mock传参与返回设定

 精确匹配

public void case0() {//匹配调用
        List mockedList = Mockito.mock(ArrayList.class);
        Mockito.when(mockedList.get(0)).thenReturn("first");
        Mockito.when(mockedList.get(1)).thenThrow(new RuntimeException());
        System.out.println(mockedList.get(0));//first
        System.out.println(mockedList.get(1));//exception
    }

模糊匹配

public void case1(){//模糊调用
        TestOpt tt = Mockito.mock(TestOpt.class);
        Mockito.when(tt.one(Mockito.anyInt(), Mockito.anyInt())).thenReturn(3).thenReturn(4);//多次调用
        System.out.println(tt.one(3, 11));//3
        System.out.println(tt.one(3, 11));//4
    }

3 调用次数判断并集合annotation使用

    @Mock private TestOpt tt;
    @Mock private service ser;
    @Test
    public void case2(){//调用次数+注解
        MockitoAnnotations.initMocks(this);//annotation调用
        Mockito.when(this.ser.services(1, 10)).thenReturn("100");
        Mockito.when(this.tt.one(1, 40)).thenReturn(20);
        System.out.println(ser.services(1, 10));System.out.println(ser.services(1, 9));

//校验次数
         tt.three();
         tt.three();
         System.out.println(tt.one(1, 40));System.out.println(tt.one(1, 33));
         Mockito.verify(tt, Mockito.times(2)).three();
         Mockito.verify(tt, Mockito.atLeast(1)).three();
         Mockito.verify(tt, Mockito.atLeastOnce()).three();
//         Mockito.verify(tt, Mockito.never()).three(); //从未调用
    }
    

随手写的类--用于测试

public class TestOpt implements TestOptI {
    public int one(int a ,int b){
        return a+b;
    }
    public int two(int a ,int b){
        return one(a, b)+one(a, b)+one(a, b);
    }
    public int three(){
        return 300;
    }
}

public class service {
    TestOptI i = null;
    public String services(int a,int b){
        i = new TestOpt();
        return String.valueOf(i.one(a, 2)+i.three());
    }
}