使用MockMVC测试Spring MVC路由器
我正在尝试使用Spring测试来测试我的Spring MVC webapp。 它使用springmvc-router进行路由，这似乎打破了测试，当我使用@RequestMapping而不是我的routes.conf文件时，它可以正常工作。
我有一个名为valid.jsp的.jsp文件，当我从Jetty运行开发站点时，它显示正常。 控制器是：
@Controller @EnableWebMvc public class AuthController { public String valid() { return "valid"; } }
我的GET /valid authController.valid文件映射了GET /valid authController.valid 。
现在，我的测试仪看起来像
@RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations = {"/test-context.xml", "/spring/spring-security.xml", "file:src/main/webapp/WEB-INF/mvc-config.xml"}) @WebAppConfiguration @Import(RouteConfig.class) public class AuthControllerTest { private MockMvc mockMvc; @Autowired private WebApplicationContext webApplicationContext; @Autowired private AuthenticationManager authenticationManager; @Before public void init() { MockitoAnnotations.initMocks(this); mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).dispatchOptions(true).build(); } @Test public void testValid() throws Exception { mockMvc.perform(get("/validation-success")) .andDo(print()) .andExpect(status().isOk()); }
运行mockMvc.perform() ，抛出NullPointerException：
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NullPointerException at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:943) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:822) at javax.servlet.http.HttpServlet.service(HttpServlet.java:668) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:807) at org.springframework.test.web.servlet.TestDispatcherServlet.service(TestDispatcherServlet.java:64) at javax.servlet.http.HttpServlet.service(HttpServlet.java:770) at org.springframework.mock.web.MockFilterChain$ServletFilterProxy.doFilter(MockFilterChain.java:170) at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:137) at org.springframework.test.web.servlet.MockMvc.perform(MockMvc.java:141) at com.mypackage.AuthControllerTest.testValid(AuthControllerTest.java:45) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74) at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83) at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:232) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71) at org.junit.runners.ParentRunner.run(ParentRunner.java:309) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:175) at org.junit.runner.JUnitCore.run(JUnitCore.java:160) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:77) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:195) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:63) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120) Caused by: java.lang.NullPointerException at org.resthub.web.springmvc.router.HTTPRequestAdapter.parseRequest(HTTPRequestAdapter.java:196) at org.resthub.web.springmvc.router.RouterHandlerMapping.getHandlerInternal(RouterHandlerMapping.java:166) at org.springframework.web.servlet.handler.AbstractHandlerMapping.getHandler(AbstractHandlerMapping.java:300) at org.springframework.web.servlet.DispatcherServlet.getHandler(DispatcherServlet.java:1101) at org.springframework.test.web.servlet.TestDispatcherServlet.getHandler(TestDispatcherServlet.java:104) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:916) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:931) ... 41 more
所以问题是：是否可以将Spring的测试框架与springmvc-router一起使用？
在做了一些挖掘之后，我发现HTTPRequestAdapter.parseRequest()方法存在MockMVC发送请求的方式的问题。 具体来说，MockMVC发送的请求不包含名称为host的请求中的标头。
HTTPRequestAdapter需要该头并且不考虑它可以为null的事实，因此它生成NullPointerException 。
我用这段代码解决了这个问题：
mockMvc.perform(get("/validation-success") .header("host", "localhost:80")) .andExpect(status().isOk());
host头不会为空，您的测试应该通过。