SPRING-MVC的控制器測試

Question

當我不執行測試時，控制器中出現“說空指針異常”錯誤。 一切正常。

Controller :
@RequestMapping(value = "/studentinsection/{sectionId}", method = RequestMethod.GET)
    public ModelAndView studentInSectionForm(@ModelAttribute("studentInSectionFormData") StudentInSectionForm studentInSectionFormData,
                                             @PathVariable Integer sectionId,
                                             ModelMap model) {
        ArrayList<StudentInSections> studentInSectionList = (ArrayList<StudentInSections>)
                studentInSectionsService.retrieveAllStudentInSections(sectionId, 1);

        StudentSection studentSection = studentSectionService.retrieveStudentSection(sectionId);

        logger.info("section Name is:" + studentSection.getSectionName());

        ArrayList<User> userList = new ArrayList<User>();
        for (StudentInSections studentInSections : studentInSectionList) {
            String studentName =
                    (userService.retrieveUserName(studentInSections.getStudentId(), 1));
            User users = userService.retrieveUser(studentName);
            userList.add(users);
        }


        logger.info("sectionId is " + sectionId);

        ArrayList<User> allStudents = (ArrayList<User>)
                userService.retrieveAllStudents();

        studentInSectionFormData.setStudentInSectionList(studentInSectionList);
        model.addAttribute("studentList", allStudents);
        model.addAttribute("userList", userList);
        model.addAttribute("studentSectionName", studentSection.getSectionName());
        model.addAttribute("studentSectionId", studentSection.getSectionId());
        return new ModelAndView("studentinsection", "studentInSectionFormData", studentInSectionFormData);
    }


Testing is as follow:

    @Test
    public void testStudentInSectionForm() throws Exception {
        mockMvc.perform(get("/studentinsection/1"))
                .andExpect(status().isFound())
                .andExpect(redirectedUrl("studentinsection"));
    }

這將所有內容都傳遞到控制器中，即使在記錄器中sectionId被打印為1，也比studentin sectionList返回nullMointerException還要好。 幫助我解決我的問題。

Answer 1

看來上下文未正確加載。 什么是異常stacktrace。

您也可以查看請求：

  mockMvc.perform(get("/studentinsection/1"))
   .andExpect(status().isFound())
   .andDo(print())