Mockito （一）

曾经终败给现在 2021-12-24 19:21 269阅读 0赞

## 几个概念 ##

Mock

Stub

Spy

## 使用 ##

### 多次调用返回不同的结果 ###

1 when(mock.someMethod("some arg"))
    2    .thenThrow(new RuntimeException())  // 第一次会抛出异常
    3    .thenReturn("foo"); // 第二次会返回这个结果
    4 //First call: throws runtime exception:
    5 mock.someMethod("some arg"); // 第一次
    6 //Second call: prints "foo"
    7 System.out.println(mock.someMethod("some arg")); // 第二次
    8 //Any consecutive call: prints "foo" as well (last stubbing wins).
    9 System.out.println(mock.someMethod("some arg")); // 第n次(n> 2)，依旧以最后返回最后一个配置

### 部分Mock - spy ###

3 //you can enable partial mock capabilities selectively on mocks:
    4 Foo mock = mock(Foo.class);
    5 //Be sure the real implementation is 'safe'.
    6 //If real implementation throws exceptions or depends on specific state of the object then you're in trouble.
    7 when(mock.someMethod()).thenCallRealMethod();

1 List list = new LinkedList();
     2 List spy = spy(list);
     3 //optionally, you can stub out some methods:
     4 when(spy.size()).thenReturn(100);
     5 //using the spy calls *real* methods
     6 spy.add("one");
     7 spy.add("two");
     8 //prints "one" - the first element of a list
     9 System.out.println(spy.get(0));
    10 //size() method was stubbed - 100 is printed
    11 System.out.println(spy.size());
    12 //optionally, you can verify
    13 verify(spy).add("one");
    14 verify(spy).add("two");

### Mock 依赖Bean ###

使用@InjectMocks，自动将模拟对象或侦查域注入到被测试对象中。

// FileService 依赖 FileDao
    @InjectMocks
    @Autowired
    private FileService fileService;
    
    @Mock
    private FileDao fileDao;

更多的使用方法可以参考[Mockito浅谈][Mockito]

## 参考 ##

*  [JUnit + Mockito 单元测试（二）][JUnit _ Mockito]
 *  [Unit tests with Mockito - Tutorial][]
 *  [Mockito官网][Mockito 1]
 *  [单元测试利器-Mockito 中文文档 ][-Mockito _]

转载于:https://www.cnblogs.com/tonyq/p/7599225.html

[Mockito]: http://www.jianshu.com/p/77db26b4fb54
[JUnit _ Mockito]: http://blog.csdn.net/zhangxin09/article/details/42422643
[Unit tests with Mockito - Tutorial]: http://www.vogella.com/tutorials/Mockito/article.html
[Mockito 1]: http://site.mockito.org/
[-Mockito _]: http://blog.csdn.net/bboyfeiyu/article/details/52127551