为java spring控制器创建单元测试时NullPointerExecption失败

我对莫基托和朱尼来说是个新手。我正在为“忘记密码”工作流创建一个测试用例。下面是控制器和测试的代码。由于NullPointerException，测试用例失败。我在下面添加了stacktrace。有人能帮我修一下密码吗？谢谢

@RequestMapping(value = "/user/public/forgotPassword", method = RequestMethod.POST)
public ModelAndView sendforgetPasswordLink(@ModelAttribute ForgetPasswordBean forgetPasswordBean,BindingResult result, HttpSession session) {

    BreadCrumbBuilder.addLinktoBreadCrumb(session, new Link(Constants.FORGET_PASSWORD_TITLE, "/user/public/forgotPassword", Constants.GROUP_USER, 0));

    Map<String, String> breadCrumbs = HomePageController.setupInitialBreadCrumbs(session);
    breadCrumbs.put(Constants.FORGET_PASSWORD_TITLE,    "/user/public/forgotPassword"); 
    session.setAttribute(SessionAttributes.BREAD_CRUMBS,breadCrumbs);

    ModelAndView mav = new ModelAndView(); 
    mav.addObject("displayTitle", Constants.FORGET_PASSWORD_TITLE);

    PublicUser user = publicUserService.findPublicUserByEmail(forgetPasswordBean.getEmail().toLowerCase());
    if(user == null) {
        result.reject("email", "An account does not exist for this email.");
        mav.setViewName("publicuser/forgetPassword.jsp");
        return mav;
    }

    String randomId = java.util.UUID.randomUUID().toString();
    user.setTempId(randomId);
    mailService.sendForgetPasswordLink(user);
    publicUserService.savePublicUser(user);
    String msg = "Password reset instructions have been sent to your email.";

    mav.addObject("msg", msg);
    mav.setViewName("message.jsp");
    return mav;
}

跟踪从这里开始

java.lang.NullPointerException
at gov.hhs.cdelr.web.PublicUserControllerTest.TestForgetPasswordForNoUserFound(PublicUserControllerTest.java:105)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
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.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
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.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

第410行是这一行：

result.reject("email", "An account does not exist for this email.");

---

由于您的测试代码似乎不完整，我假设您忘记为这个测试用例初始化mockBindingResult

遗憾的是，我不能告诉你更多，因为我既没有看到设置方法，也没有看到测试类的其他部分

安装方法可能会有所帮助，因为它将在每次测试之前运行，您应该在其中初始化mockBindingResult

@Before
public void setUp() {
    // Do Stuff before every test
}

---

由于您的测试代码似乎不完整，我假设您忘记为这个测试用例初始化mockBindingResult

遗憾的是，我不能告诉你更多，因为我既没有看到设置方法，也没有看到测试类的其他部分

安装方法可能会有所帮助，因为它将在每次测试之前运行，您应该在其中初始化mockBindingResult

@Before
public void setUp() {
    // Do Stuff before every test
}

---

非常感谢！是的，我没有在setupMock（）中初始化它。现在可以了，非常感谢！是的，我没有在setupMock（）中初始化它。现在可以了。