Java 使用 MockMVC 测试 Spring MVC 路由器

Testing Spring MVC Router with MockMVC

提问by AVP

I'm trying to test my Spring MVC webapp with Spring test. It uses springmvc-routerfor routing and that appears to break the tests, which work fine when I use @RequestMappinginstead of my routes.conffile.

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，这似乎破坏了测试，当我使用@RequestMapping而不是我的routes.conf文件时，它可以正常工作。

I have a .jspfile called valid.jsp, and it displays fine when I run the development site from Jetty. The controller is:

我有一个.jsp名为的文件valid.jsp，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";
  }
}

My routes.conffile maps GET /valid authController.valid.

我的routes.conf文件映射GET /valid authController.valid。

Now, my tester looks like

现在，我的测试员看起来像

@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());
  }

When the mockMvc.perform()is run, a NullPointerException is thrown:

当mockMvc.perform()运行时，则抛出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.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.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access
mockMvc.perform(get("/validation-success")
       .header("host", "localhost:80"))
       .andExpect(status().isOk());
0(ParentRunner.java:53)
    at org.junit.runners.ParentRunner.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

So the question is: is it possible to use Spring's test framework with springmvc-router?

所以问题是：是否可以将 Spring 的测试框架与 springmvc-router 一起使用？

采纳答案by TheMasster12

After doing some digging, I've discovered that the HTTPRequestAdapter.parseRequest()method has an issue with the way that MockMVC sends requests. Specifically, the request sent by MockMVC doesn't include a header in the request with the name host.

在做了一些挖掘之后，我发现该HTTPRequestAdapter.parseRequest()方法在 MockMVC 发送请求的方式上存在问题。具体来说，MockMVC 发送的请求在请求中不包含名称为 的标头host。

HTTPRequestAdapterrequires that header and does not account for the fact that it can be null, so it generates the NullPointerException.

HTTPRequestAdapter需要该标头并且不考虑它可以为空的事实，因此它生成NullPointerException.

I fixed the issue with this code:

我用这段代码解决了这个问题：

##代码##

The hostheader won't be null and your tests should pass.

该host头将不为空，你的测试应该通过。