如何使用@PathVariable对Spring MVC控制器进行单元测试？

Z时代
2024-01-10
分类：问答

我有一个与此类似的简单带注释的控制器：

@Controller
public class MyController {
  @RequestMapping("/{id}.html")
  public String doSomething(@PathVariable String id, Model model) {
    // do something
    return "view";
  }
}

我想用这样的单元测试来测试它：

public class MyControllerTest {
  @Test
  public void test() {
    MockHttpServletRequest request = new MockHttpServletRequest();
    request.setRequestURI("/test.html");
    new AnnotationMethodHandlerAdapter()
      .handle(request, new MockHttpServletResponse(), new MyController());
    // assert something
  }
}

问题是AnnotationMethodHandlerAdapter.handler（）方法引发异常：

java.lang.IllegalStateException: Could not find @PathVariable [id] in @RequestMapping at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.resolvePathVariable(AnnotationMethodHandlerAdapter.java:642) at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.resolvePathVariable(HandlerMethodInvoker.java:514) at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.resolveHandlerArguments(HandlerMethodInvoker.java:262) at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:146)

回答：

从Spring 3.2开始，有一种合适的方法可以轻松，优雅地进行测试。你将可以执行以下操作：

@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration
@ContextConfiguration("servlet-context.xml")
public class SampleTests {
  @Autowired
  private WebApplicationContext wac;
  private MockMvc mockMvc;
  @Before
  public void setup() {
    this.mockMvc = webAppContextSetup(this.wac).build();
  }
  @Test
  public void getFoo() throws Exception {
    this.mockMvc.perform(get("/foo").accept("application/json"))
        .andExpect(status().isOk())
        .andExpect(content().mimeType("application/json"))
        .andExpect(jsonPath("$.name").value("Lee"));
  }
}