mock SpringMVC 测试控制器方法

从Spring3.2开始 Spring包含了一种mockSpringMVC并针对controller执行http请求的机制

如(该代码选自spring实战4)：

public void shouldShowRecentSpittles() throws Exception{
List<Spittle> expectedSpittles = createSpittleList(20);
SpittleRespository mockRepository =
mock(SpittleRespository.class);
when(mockRepository.findSpittles(Long.MAX_VALUE, 20))
.thenReturn(expectedSpittles);

SpittleController controller =
new SpittleController(mockRepository);
MockMvc mockMvc = standaloneSetup(controller)
.setSingleView(
new InternalResourceView("/WEB-INF/views/spittles.jsp"))
.build();

mockMvc.perform(get("/spittles"))
.andExpect(view().name("spittles"))
.andExpect(model().attributeExists("spittleList"))
.andExpect(model().attribute("spittleList",
CoreMatchers.hasItems(expectedSpittles.toArray())));
}

　　

public interface SpittleRespository {

List<Spittle> findSpittles(long max, int count);
public Spittle findOne(long id);

}

　　mock 以及when thenreturn 的用法在我的理解看来就是 mock方法实现了一个接口对象 when thenreturn方法对该接口对象的方法写死传入参数及返回值 之后再利用mockMvc模拟http方法请求controller 并且验证view model等属性