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