MockMVC - 基于RESTful风格的SpringMVC的测试
对于前后端分离的项目而言,无法直接从前端静态代码中测试接口的正确性,因此可以通过
MockMVC
来模拟HTTP请求。基于RESTful风格
的SpringMVC
的测试,我们可以测试完整的Spring MVC流程,即从URL请求到控制器处理,再到视图渲染都可以测试。
package test.example.controller; import com.DemoApplication; import com.example.entity.TbUser; import com.example.services.TbUserService; import com.fasterxml.jackson.databind.ObjectMapper; import org.junit.Assert; import org.junit.Before; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.http.MediaType; import org.springframework.mock.web.MockHttpSession; import org.springframework.test.context.junit4.SpringRunner; import org.springframework.test.web.servlet.MockMvc; import org.springframework.test.web.servlet.request.MockHttpServletRequestBuilder; import org.springframework.test.web.servlet.result.MockMvcResultMatchers; import org.springframework.test.web.servlet.setup.MockMvcBuilders; import org.springframework.web.context.WebApplicationContext; import java.sql.Date; import java.util.List; import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get; import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post; import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print; import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status; @RunWith(SpringRunner.class) @SpringBootTest(classes = DemoApplication.class, webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT) public class UserControllerTest { @Autowired WebApplicationContext webApplicationContext; MockMvc mockMvc; MockHttpSession session; @Autowired TbUserService tbUserService; String contextPath = "/spring-start"; @Before public void setupMockMvc() { mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build(); //初始化MockMvc对象 session = new MockHttpSession(); session.setAttribute("user", "101"); } @Test public void getUsers() { List<TbUser> userList = tbUserService.queryPage(1, 10); Assert.assertTrue("not empty", userList.size() > 0); } @Test public void queryUsersTest() throws Exception { { String url = "/users"; MockHttpServletRequestBuilder requestBuilder = get(url).param("page", "1") .param("size", "10"); mockMvc.perform(requestBuilder).andExpect(status().isOk()).andDo(print()); } } @Test public void getUserListTest() throws Exception { String url = "/user/list"; MockHttpServletRequestBuilder requestBuilder = get(url).param("page", "0") .param("size", "10").contentType(MediaType.APPLICATION_JSON_UTF8).accept(MediaType.APPLICATION_JSON_UTF8); mockMvc.perform(requestBuilder).andDo(print()); } @Test public void createUserTest() throws Exception { ObjectMapper mapper = new ObjectMapper(); TbUser tbUser = new TbUser(); tbUser.setUserName("mock username"); tbUser.setUserSex("2"); tbUser.setUserBirthday(Date.valueOf("1991-12-12")); tbUser.setUserEmail("cdchencw@126.com"); tbUser.setUserEdu("4"); tbUser.setUserTelephone("13211335451"); tbUser.setUserAddress("湖北省武汉市"); String json = mapper.writeValueAsString(tbUser); String url = "/user/create"; MockHttpServletRequestBuilder requestBuilder = post(url).content(json) .contentType(MediaType.APPLICATION_JSON_UTF8).accept(MediaType.APPLICATION_JSON_UTF8); mockMvc.perform(requestBuilder) .andExpect(status().is(200)) .andExpect(MockMvcResultMatchers.content().contentType(MediaType.APPLICATION_JSON_UTF8)) .andDo(print()).andReturn(); } }
快速入门-这个方法中包含了大多数的常见情况:
@RunWith(SpringRunner.class)
@SpringBootTest
@AutoConfigureMockMvc
public class CourseControllerTest {
@Autowired
private MockMvc mockMvc;
//ObjectMapper是一个可以重复使用的对象
@Autowired
private ObjectMapper mapper;
@Test
public void courseListTest() throws Exception{
mockMvc.perform(MockMvcRequestBuilders.get("/course"))
.andExpect(MockMvcResultMatchers.status().isOk());
}
@Test
public void createTest() throws Exception{
String json = "{"name":"Mock测试","classHour":"4课时","id":"rn:practice:Course:5af27fa5d34f435e581e5bbf"}";
//将json格式字符串转换成Course对象里的属性值
Course course = mapper.readValue(json,Course.class);
//perform,执行一个RequestBuilders请求,会自动执行SpringMVC的流程并映射到相应的控制器执行处理
mockMvc.perform(
//构造一个post请求
MockMvcRequestBuilders.post("/course")
.contentType(MediaType.APPLICATION_JSON_UTF8)
//使用writeValueAsString()方法来获取对象的JSON字符串表示
.content(mapper.writeValueAsString(course)))
//andExpect,添加ResultMathcers验证规则,验证控制器执行完成后结果是否正确,【这是一个断言】
.andExpect(MockMvcResultMatchers.status().is(200))
.andExpect(MockMvcResultMatchers.content().contentType(MediaType.APPLICATION_JSON_UTF8))
//假定返回的结果中,"name" 值为 "Mock测试2",如果不是的话,会抛出异常java.lang.AssertionError,并给出期望值和实际值
.andExpect(MockMvcResultMatchers.jsonPath("$.name").value("Mock测试2"))
//添加ResultHandler结果处理器,比如调试时 打印结果(print方法)到控制台
.andDo(print())
//返回相应的MvcResult
.andReturn();
}
原理:
一 MockMvcBuilder
MockMvcBuilder
是用来构造MockMvc
的构造器,其主要有两个实现:StandaloneMockMvcBuilder
和DefaultMockMvcBuilder
,分别对应两种测试方式,即独立安装和集成Web环境
测试(此种方式并不会集成真正的web环境,而是通过相应的Mock API
进行模拟测试,无须启动服务器)。对于我们来说直接使用静态工厂MockMvcBuilders
创建即可。
1.集成Web环境方式
MockMvcBuilders.webAppContextSetup(WebApplicationContext context):指定WebApplicationContext,将会从该上下文获取相应的控制器并得到相应的MockMvc;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:config/IncotermsRestServiceTest-context.xml")
@WebAppConfiguration
public class IncotermsRestServiceTest {
@Autowired
private WebApplicationContext wac;
private MockMvc mockMvc;
@Before
public void setup() {
this.mockMvc = MockMvcBuilders.webAppContextSetup(this.wac).build(); //构造MockMvc
}
...
}
注意:
(1)@WebAppConfiguration:测试环境使用,用来表示测试环境使用的ApplicationContext将是WebApplicationContext类型的;value指定web应用的根;
(2)通过@Autowired WebApplicationContext wac:注入web环境的ApplicationContext容器;
(3)然后通过MockMvcBuilders.webAppContextSetup(wac).build()创建一个MockMvc进行测试;
2.独立测试方式
MockMvcBuilders.standaloneSetup(Object... controllers):通过参数指定一组控制器,这样就不需要从上下文获取了;
public class PricingExportResultsRestServiceTest {
@InjectMocks
private PricingExportResultsRestService pricingExportResultsRestService;
@Mock
private ExportRateScheduleService exportRateScheduleService;
@Mock
private PricingUrlProvider pricingUrlProvider;
private MockMvc mockMvc;
@Before
public void setup() {
MockitoAnnotations.initMocks(this);
mockMvc = MockMvcBuilders.standaloneSetup(pricingExportResultsRestService).build(); //构造MockMvc
}
...
}
主要是两个步骤:
(1)首先自己创建相应的控制器,注入相应的依赖
(2)通过MockMvcBuilders.standaloneSetup模拟一个Mvc测试环境,通过build得到一个MockMvc
二 MockMvc
先看一个测试例子1:
@Test
public void createIncotermSuccess() throws Exception {
IncotermTo createdIncoterm = new IncotermTo();
createdIncoterm.setId(new IncotermId(UUID.fromString("6305ff33-295e-11e5-ae37-54ee7534021a")));
createdIncoterm.setCode("EXW");
createdIncoterm.setDescription("code exw");
createdIncoterm.setLocationQualifier(LocationQualifier.DEPARTURE);
when(inventoryService.create(any(IncotermTo.class))).thenReturn(createdIncoterm); mockMvc.perform(post("/secured/resources/incoterms/create").accept(MediaType.APPLICATION_JSON).contentType(MediaType.APPLICATION_JSON)
.content("{"code" : "EXW", "description" : "code exw", "locationQualifier" : "DEPARTURE"}".getBytes()))
//.andDo(print())
.andExpect(status().isOk())
.andExpect(jsonPath("id.value").exists())
.andExpect(jsonPath("id.value").value("6305ff33-295e-11e5-ae37-54ee7534021a"))
.andExpect(jsonPath("code").value("EXW"));
}
perform:执行一个RequestBuilder请求,会自动执行SpringMVC的流程并映射到相应的控制器执行处理;
andExpect:添加ResultMatcher验证规则,验证控制器执行完成后结果是否正确;
andDo:添加ResultHandler结果处理器,比如调试时打印结果到控制台;
andReturn:最后返回相应的MvcResult;然后进行自定义验证/进行下一步的异步处理;
看一个具体的例子2:
@Test
public void testView() throws Exception {
MvcResult result = mockMvc.perform(MockMvcRequestBuilders.get("/user/1"))
.andExpect(MockMvcResultMatchers.view().name("user/view"))
.andExpect(MockMvcResultMatchers.model().attributeExists("user"))
.andDo(MockMvcResultHandlers.print())
.andReturn();
Assert.assertNotNull(result.getModelAndView().getModel().get("user"));
}
整个过程:
- mockMvc.perform执行一个请求;
- MockMvcRequestBuilders.get("/user/1")构造一个请求
- ResultActions.andExpect添加执行完成后的断言
- ResultActions.andDo添加一个结果处理器,表示要对结果做点什么事情,比如此处使用MockMvcResultHandlers.print()输出整个响应结果信息。
- ResultActions.andReturn表示执行完成后返回相应的结果。
整个测试过程非常有规律:
- 准备测试环境
- 通过MockMvc执行请求
- 添加验证断言
3.1 添加结果处理器
3.2 得到MvcResult进行自定义断言/进行下一步的异步请求 - 卸载测试环境
三 RequestBuilder/MockMvcRequestBuilders
从名字可以看出,RequestBuilde
r用来构建请求的,其提供了一个方法buildRequest(ServletContext servletContext)
用于构建MockHttpServletRequest
;其主要有两个子类MockHttpServletRequestBuilder
和MockMultipartHttpServletRequestBuilder
(如文件上传使用),即用来Mock客户端
请求需要的所有数据。
1.MockMvcRequestBuilders主要API
MockHttpServletRequestBuilder get(String urlTemplate, Object... urlVariables):根据uri模板和uri变量值得到一个GET请求方式的MockHttpServletRequestBuilder;如get(/user/{id}, 1L);
MockHttpServletRequestBuilder post(String urlTemplate, Object... urlVariables):同get类似,但是是POST方法;
MockHttpServletRequestBuilder put(String urlTemplate, Object... urlVariables):同get类似,但是是PUT方法;
MockHttpServletRequestBuilder delete(String urlTemplate, Object... urlVariables) :同get类似,但是是DELETE方法;
MockHttpServletRequestBuilder options(String urlTemplate, Object... urlVariables):同get类似,但是是OPTIONS方法;
MockHttpServletRequestBuilder request(HttpMethod httpMethod, String urlTemplate, Object... urlVariables): 提供自己的Http请求方法及uri模板和uri变量,如上API都是委托给这个API;
MockMultipartHttpServletRequestBuilder fileUpload(String urlTemplate, Object... urlVariables):提供文件上传方式的请求,得到MockMultipartHttpServletRequestBuilder;
RequestBuilder asyncDispatch(final MvcResult mvcResult):创建一个从启动异步处理的请求的MvcResult进行异步分派的RequestBuilder;
2.MockHttpServletRequestBuilder和MockMultipartHttpServletRequestBuilder API
(1)MockHttpServletRequestBuilder API
MockHttpServletRequestBuilder header(String name, Object... values)/MockHttpServletRequestBuilder headers(HttpHeaders httpHeaders):添加头信息;
MockHttpServletRequestBuilder contentType(MediaType mediaType):指定请求的contentType头信息;
MockHttpServletRequestBuilder accept(MediaType... mediaTypes)/MockHttpServletRequestBuilder accept(String... mediaTypes):指定请求的Accept头信息;
MockHttpServletRequestBuilder content(byte[] content)/MockHttpServletRequestBuilder content(String content):指定请求Body体内容;
MockHttpServletRequestBuilder cookie(Cookie... cookies):指定请求的Cookie;
MockHttpServletRequestBuilder locale(Locale locale):指定请求的Locale;
MockHttpServletRequestBuilder characterEncoding(String encoding):指定请求字符编码;
MockHttpServletRequestBuilder requestAttr(String name, Object value) :设置请求属性数据;
MockHttpServletRequestBuilder sessionAttr(String name, Object value)/MockHttpServletRequestBuilder sessionAttrs(Map<string, object=""> sessionAttributes):设置请求session属性数据;
MockHttpServletRequestBuilder flashAttr(String name, Object value)/MockHttpServletRequestBuilder flashAttrs(Map<string, object=""> flashAttributes):指定请求的flash信息,比如重定向后的属性信息;
MockHttpServletRequestBuilder session(MockHttpSession session) :指定请求的Session;
MockHttpServletRequestBuilder principal(Principal principal) :指定请求的Principal;
MockHttpServletRequestBuilder contextPath(String contextPath) :指定请求的上下文路径,必须以“/”开头,且不能以“/”结尾;
MockHttpServletRequestBuilder pathInfo(String pathInfo) :请求的路径信息,必须以“/”开头;
MockHttpServletRequestBuilder secure(boolean secure):请求是否使用安全通道;
MockHttpServletRequestBuilder with(RequestPostProcessor postProcessor):请求的后处理器,用于自定义一些请求处理的扩展点;
(2)MockMultipartHttpServletRequestBuilder
继承自MockHttpServletRequestBuilder,又提供了如下API
MockMultipartHttpServletRequestBuilder file(String name, byte[] content)/MockMultipartHttpServletRequestBuilder file(MockMultipartFile file):指定要上传的文件;
四 ResultActions
调用MockMvc.perform(RequestBuilder requestBuilder)后将得到ResultActions,通过ResultActions完成如下三件事:
ResultActions andExpect(ResultMatcher matcher) :添加验证断言来判断执行请求后的结果是否是预期的;
ResultActions andDo(ResultHandler handler) :添加结果处理器,用于对验证成功后执行的动作,如输出下请求/结果信息用于调试;
MvcResult andReturn() :返回验证成功后的MvcResult;用于自定义验证/下一步的异步处理;
五 ResultMatcher/MockMvcResultMatchers
1.ResultMatcher用来匹配执行完请求后的结果验证,其就一个match(MvcResult result)断言方法,如果匹配失败将抛出相应的异常;spring mvc测试框架提供了很多***ResultMatchers来满足测试需求。注意这些***ResultMatchers并不是ResultMatcher的子类,而是返回ResultMatcher实例的。Spring mvc测试框架为了测试方便提供了MockMvcResultMatchers静态工厂方法方便操作;
2.具体的API如下:
HandlerResultMatchers handler():请求的Handler验证器,比如验证处理器类型/方法名;此处的Handler其实就是处理请求的控制器;
RequestResultMatchers request():得到RequestResultMatchers验证器;
ModelResultMatchers model():得到模型验证器;
ViewResultMatchers view():得到视图验证器;
FlashAttributeResultMatchers flash():得到Flash属性验证;
StatusResultMatchers status():得到响应状态验证器;
HeaderResultMatchers header():得到响应Header验证器;
CookieResultMatchers cookie():得到响应Cookie验证器;
ContentResultMatchers content():得到响应内容验证器;
JsonPathResultMatchers jsonPath(String expression, Object ... args)/ResultMatcher jsonPath (String expression, Matcher matcher):得到Json表达式验证器;
XpathResultMatchers xpath(String expression, Object... args)/XpathResultMatchers xpath(String expression, Map<string, string=""> namespaces, Object... args):得到Xpath表达式验证器;
ResultMatcher forwardedUrl(final String expectedUrl):验证处理完请求后转发的url(绝对匹配);
ResultMatcher forwardedUrlPattern(final String urlPattern):验证处理完请求后转发的url(Ant风格模式匹配,@since spring4);
ResultMatcher redirectedUrl(final String expectedUrl):验证处理完请求后重定向的url(绝对匹配);
ResultMatcher redirectedUrlPattern(final String expectedUrl):验证处理完请求后重定向的url(Ant风格模式匹配,@since spring4)
六 一些常用的测试
1.测试普通控制器
mockMvc.perform(get("/user/{id}", 1)) //执行请求
.andExpect(model().attributeExists("user")) //验证存储模型数据
.andExpect(view().name("user/view")) //验证viewName
.andExpect(forwardedUrl("/WEB-INF/jsp/user/view.jsp"))//验证视图渲染时forward到的jsp
.andExpect(status().isOk())//验证状态码
.andDo(print()); //输出MvcResult到控制台
2.得到MvcResult自定义验证
MvcResult result = mockMvc.perform(get("/user/{id}", 1))//执行请求
.andReturn(); //返回MvcResult
Assert.assertNotNull(result.getModelAndView().getModel().get("user")); //自定义断言
3.验证请求参数绑定到模型数据及Flash属性
mockMvc.perform(post("/user").param("name", "zhang")) //执行传递参数的POST请求(也可以post("/user?name=zhang"))
.andExpect(handler().handlerType(UserController.class)) //验证执行的控制器类型
.andExpect(handler().methodName("create")) //验证执行的控制器方法名
.andExpect(model().hasNoErrors()) //验证页面没有错误
.andExpect(flash().attributeExists("success")) //验证存在flash属性
.andExpect(view().name("redirect:/user")); //验证视图
4.文件上传
byte[] bytes = new byte[] {1, 2};
mockMvc.perform(fileUpload("/user/{id}/icon", 1L).file("icon", bytes)) //执行文件上传
.andExpect(model().attribute("icon", bytes)) //验证属性相等性
.andExpect(view().name("success")); //验证视图
5.JSON请求/响应验证
String requestBody = "{"id":1, "name":"zhang"}";
mockMvc.perform(post("/user")
.contentType(MediaType.APPLICATION_JSON).content(requestBody)
.accept(MediaType.APPLICATION_JSON)) //执行请求
.andExpect(content().contentType(MediaType.APPLICATION_JSON)) //验证响应contentType
.andExpect(jsonPath("$.id").value(1)); //使用Json path验证JSON 请参考http://goessner.net/articles/JsonPath/
String errorBody = "{id:1, name:zhang}";
MvcResult result = mockMvc.perform(post("/user")
.contentType(MediaType.APPLICATION_JSON).content(errorBody)
.accept(MediaType.APPLICATION_JSON)) //执行请求
.andExpect(status().isBadRequest()) //400错误请求
.andReturn();
Assert.assertTrue(HttpMessageNotReadableException.class.isAssignableFrom(result.getResolvedException().getClass()));//错误的请求内容体
6.异步测试
//Callable
MvcResult result = mockMvc.perform(get("/user/async1?id=1&name=zhang")) //执行请求
.andExpect(request().asyncStarted())
.andExpect(request().asyncResult(CoreMatchers.instanceOf(User.class))) //默认会等10秒超时
.andReturn();
mockMvc.perform(asyncDispatch(result))
.andExpect(status().isOk())
.andExpect(content().contentType(MediaType.APPLICATION_JSON))
.andExpect(jsonPath("$.id").value(1));
7.全局配置
mockMvc = webAppContextSetup(wac)
.defaultRequest(get("/user/1").requestAttr("default", true)) //默认请求 如果其是Mergeable类型的,会自动合并的哦mockMvc.perform中的RequestBuilder
.alwaysDo(print()) //默认每次执行请求后都做的动作
.alwaysExpect(request().attribute("default", true)) //默认每次执行后进行验证的断言
.build();
mockMvc.perform(get("/user/1"))
.andExpect(model().attributeExists("user"));